What is
a Microprocessor?
Microprocessor is a program-controlled device, which fetches the instructions from memory, decodes and executes the instructions. Most Micro Processor are single- chip devices.
Microprocessor is a program-controlled device, which fetches the instructions from memory, decodes and executes the instructions. Most Micro Processor are single- chip devices.
What
are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
Why
crystal is a preferred clock source?
Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
In 8085
which is called as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.
Flag is called as Low order register & Accumulator is called as High order Register.
What is
Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
What
happens when HLT instruction is executed in processor?
The Micro Processor enters into Halt-State and the buses are tri-stated.
The Micro Processor enters into Halt-State and the buses are tri-stated.
Which
Stack is used in 8085?
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first
What is
Program counter?
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
What
are the various registers in 8085?
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
What’s
the speed and device maximum specs for Firewire?
IEEE 1394 (Firewire) supports the maximum of 63 connected devices with speeds up to 400 Mbps. Where’s MBR located on the disk? Main Boot Record is located in sector 0, track 0, head 0, cylinder 0 of the primary active partition.
IEEE 1394 (Firewire) supports the maximum of 63 connected devices with speeds up to 400 Mbps. Where’s MBR located on the disk? Main Boot Record is located in sector 0, track 0, head 0, cylinder 0 of the primary active partition.
Where
does CPU Enhanced mode originate from?
Intel’s 80386 was the first 32-bit processor, and since the company had to backward-support the 8086. All the modern Intel-based processors run in the Enhanced mode, capable of switching between Real mode (just like the real 8086) and Protected mode, which is the current mode of operation.
Intel’s 80386 was the first 32-bit processor, and since the company had to backward-support the 8086. All the modern Intel-based processors run in the Enhanced mode, capable of switching between Real mode (just like the real 8086) and Protected mode, which is the current mode of operation.
How
many bit combinations are there in a byte?
Byte contains 8 combinations of bits.
Byte contains 8 combinations of bits.
Have
you studied buses? What types?
There are three types of buses.
Address bus: This is used to carry the Address to the memory to fetch either Instruction or Data.
Data bus : This is used to carry the Data from the memory.
Control bus : This is used to carry the Control signals like RD/WR, Select etc.
There are three types of buses.
Address bus: This is used to carry the Address to the memory to fetch either Instruction or Data.
Data bus : This is used to carry the Data from the memory.
Control bus : This is used to carry the Control signals like RD/WR, Select etc.
What is
the Maximum clock frequency in 8086?
5 Mhz is the Maximum clock frequency in 8086.
5 Mhz is the Maximum clock frequency in 8086.
What is
meant by Maskable interrupts?
An interrupt that can be turned off by the programmer is known as Maskable interrupt.
An interrupt that can be turned off by the programmer is known as Maskable interrupt.
What is
Non-Maskable interrupts?
An interrupt which can be never be turned off (ie. disabled) is known as Non-Maskable interrupt
An interrupt which can be never be turned off (ie. disabled) is known as Non-Maskable interrupt
What
are the different functional units in 8086?
Bus Interface Unit and Execution unit, are the two different functional units in 8086.
Bus Interface Unit and Execution unit, are the two different functional units in 8086.
What
are the various segment registers in 8086?
Code, Data, Stack, Extra Segment registers in 8086.
Code, Data, Stack, Extra Segment registers in 8086.
What
does EU do?
Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.
Execution Unit receives program instruction codes and data from BIU, executes these instructions and store the result in general registers.
Which
Stack is used in 8086? k is used in 8086?
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first.
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first.
What
are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
What is
SIM and RIM instructions?
SIM is Set Interrupt Mask. Used to mask the hardware interrupts.
RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
SIM is Set Interrupt Mask. Used to mask the hardware interrupts.
RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
What is
the difference between 8086 and 8088?
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086.
The BIU in 8088 is 8-bit data bus & 16- bit in 8086.Instruction queue is 4 byte long in 8088and 6 byte in 8086.
Give
example for Non-Maskable interrupts?
Trap is known as Non-Maskable interrupts, which is used in emergency condition.
Trap is known as Non-Maskable interrupts, which is used in emergency condition.
Give
examples for Micro controller?
Z80, Intel MSC51 &96, Motorola are the best examples of Microcontroller.
Z80, Intel MSC51 &96, Motorola are the best examples of Microcontroller.
What is
clock frequency for 8085?
3 MHz is the maximum clock frequency for 8085.
3 MHz is the maximum clock frequency for 8085.
Give an
example of one address microprocessor?
8085 is a one address microprocessor.
8085 is a one address microprocessor.
Give
examples for 8 / 16 / 32 bit Microprocessor?
8-bit Processor - 8085 / Z80 / 6800; 16-bit Processor - 8086 / 68000 / Z8000; 32-bit Processor - 80386 / 80486
8-bit Processor - 8085 / Z80 / 6800; 16-bit Processor - 8086 / 68000 / Z8000; 32-bit Processor - 80386 / 80486
What is
meant by a bus?
A bus is a group of conducting lines that carriers data, address, & control signals.
A bus is a group of conducting lines that carriers data, address, & control signals.
What
are the various registers in 8085?
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
Why
crystal is a preferred clock source?
Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
In 8085
which is called as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.
Flag is called as Low order register & Accumulator is called as High order Register.
Name 5
different addressing modes?
Immediate, Direct, Register, Register indirect, Implied addressing modes
Immediate, Direct, Register, Register indirect, Implied addressing modes
In what
way interrupts are classified in 8085?
In 8085 the interrupts are classified as Hardware and Software interrupts.
In 8085 the interrupts are classified as Hardware and Software interrupts.
What is
the difference between primary & secondary storage device?
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk.
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk.
Which
Stack is used in 8085?
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
What is
Program counter?
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
What is
the RST for the TRAP?
RST 4.5 is called as TRAP.
RST 4.5 is called as TRAP.
What
are level-triggering interrupt?
RST 6.5 & RST 5.5 are level-triggering interrupts.
RST 6.5 & RST 5.5 are level-triggering interrupts.
Which
interrupt is not level-sensitive in 8085?
RST 7.5 is a raising edge-triggering interrupt.
RST 7.5 is a raising edge-triggering interrupt.
What
are Software interrupts?
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
What
are the various flags used in 8085?
Sign flag, Zero flag, Auxiliary flag, Parity flag, Carry flag.
Sign flag, Zero flag, Auxiliary flag, Parity flag, Carry flag.
In 8085
name the 16 bit registers?
Stack pointer and Program counter all have 16 bits.
Stack pointer and Program counter all have 16 bits.
What is
Stack Pointer?
Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
What
happens when HLT instruction is executed in processor?
The Micro Processor enters into Halt-State and the buses are tri-stated.
The Micro Processor enters into Halt-State and the buses are tri-stated.
What
does Quality factor mean?
The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
How
many interrupts are there in 8085?
There are 12 interrupts in 8085.
There are 12 interrupts in 8085.
What is
Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Which
interrupt has the highest priority?
TRAP has the highest priority
TRAP has the highest priority
What
are Hardware interrupts?
TRAP, RST7.5, RST6.5, RST5.5, INTR
TRAP, RST7.5, RST6.5, RST5.5, INTR
Can an
RC circuit be used as clock source for 8085?
Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal
Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal
What is a
Microprocessor?
Microprocessor is a program-controlled device, which fetches the instructions from memory, decodes and executes the instructions. Most Micro Processor are single- chip devices.
What is the difference between microprocessor and microcontroller?
The major difference is microprocessor doesn’t have inbuilt memory but micro-controller has inbuilt memory .In Microprocessor more op-codes, few bit handling instructions. But in Microcontroller: fewer op-codes, more bit handling Instructions. Micro-controller can be defined as a device that includes micro processor, memory, & input / output signal lines on a single chip.
Give examples for 8 / 16 / 32 bit Microprocessor?
8-bit Processor - 8085 / Z80 / 6800;
16-bit Processor - 8086 / 68000 / Z8000;
32-bit Processor - 80386 / 80486.
Why 8085 processor is called an 8 bit processor?
Because 8085 processor has 8 bit ALU (Arithmetic Logic Review).
Expand HCMOS?
High-density n- type Complimentary Metal Oxide Silicon field effect transistor.
What does microprocessor speed depend on?
The processing speed depends on DATA BUS WIDTH.
What is the Maximum clock frequency in 8086?
5 Mhz is the Maximum clock frequency in 8086
Is the address bus unidirectional? Is the data bus is Bi-directional?
The address bus is unidirectional because the address information is always given by the Micro Processor to address a memory location of an input / output devices.
The data bus is Bi-directional because the same bus is used for transfer of data between Micro Processor and memory or input / output devices in both the direction.
What is the disadvantage of microprocessor?
It has limitations on the size of data. Most Microprocessor does not support floating-point operations.
What is the difference between primary & secondary storage device?
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM.
Secondary devices are: Floppy disc / Hard disk.
Difference between SRAM and DRAM?
Static RAM: No refreshing, 6 to 8 MOS transistors are required to form one memory cell, Information stored as voltage level in a flip flop.
Dynamic RAM: Refreshed periodically, 3 to 4 transistors are required to form one memory cell, Information is stored as a charge in the gate to substrate capacitance.
What is an interrupt?
Interrupt is a signal send by external device to the processor so as to request the processor to perform a particular work.
What are the different types of interrupts?
Maskable and Non-maskable interrupts.
What is cache memory?
Cache memory is a small high-speed memory. It is used for temporary storage of data & information between the main memory and the CPU (center processing unit). The cache memory is only in RAM.
Expand DMA?
Direct Memory Access
Differentiate between RAM and ROM?
RAM: Random Access Memory. Read / Write memory, High Speed, Volatile Memory. ROM: Read only memory, Low Speed, Non Volatile Memory
What is NV-RAM?
Nonvolatile Read Access Memory, also called Flash memory.
What is a flag?
Flag is a flip-flop used to store the information about the status of a processor and the status of the instruction executed most recently
What are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
What is meant by Maskable interrupt?
An interrupt that can be turned off by the programmer is known as Maskable interrupt.
What is Non-Maskable interrupt?
An interrupt which can be never be turned off (ie.disabled) is known as Non-Maskable interrupt.
Which interrupts are generally used for critical events?
Non-Maskable interrupts are used in critical events. Such as Power failure, Emergency, Shut off etc.
Give examples for Maskable interrupts?
RST 7.5, RST6.5, RST5.5 are Maskable interrupts
Give example for Non-Maskable interrupts?
Trap is known as Non-Maskable interrupts, which is used in emergency condition.
What are the various segment registers in 8086?
Code, Data, Stack, Extra Segment registers in 8086.
Which Stack is used in 8086?
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first.
What is SIM and RIM instructions?
SIM is Set Interrupt Mask. Used to mask the hardware interrupts.
RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
What is Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Give an example of one address microprocessor?
8085 is a one address microprocessor.
In what way interrupts are classified in 8085?
In 8085 the interrupts are classified as Hardware and Software interrupts.
What are Hardware interrupts?
TRAP, RST7.5, RST6.5, RST5.5, INTR.
What are Software interrupts?
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
Which interrupt has the highest priority?
TRAP has the highest priority.
Name 5 different addressing modes?
Immediate, Direct, Register, Register indirect, Implied addressing modes.
How many interrupts are there in 8085?
There are 12 interrupts in 8085.
What is the RST
Microprocessor is a program-controlled device, which fetches the instructions from memory, decodes and executes the instructions. Most Micro Processor are single- chip devices.
What is the difference between microprocessor and microcontroller?
The major difference is microprocessor doesn’t have inbuilt memory but micro-controller has inbuilt memory .In Microprocessor more op-codes, few bit handling instructions. But in Microcontroller: fewer op-codes, more bit handling Instructions. Micro-controller can be defined as a device that includes micro processor, memory, & input / output signal lines on a single chip.
Give examples for 8 / 16 / 32 bit Microprocessor?
8-bit Processor - 8085 / Z80 / 6800;
16-bit Processor - 8086 / 68000 / Z8000;
32-bit Processor - 80386 / 80486.
Why 8085 processor is called an 8 bit processor?
Because 8085 processor has 8 bit ALU (Arithmetic Logic Review).
Expand HCMOS?
High-density n- type Complimentary Metal Oxide Silicon field effect transistor.
What does microprocessor speed depend on?
The processing speed depends on DATA BUS WIDTH.
What is the Maximum clock frequency in 8086?
5 Mhz is the Maximum clock frequency in 8086
Is the address bus unidirectional? Is the data bus is Bi-directional?
The address bus is unidirectional because the address information is always given by the Micro Processor to address a memory location of an input / output devices.
The data bus is Bi-directional because the same bus is used for transfer of data between Micro Processor and memory or input / output devices in both the direction.
What is the disadvantage of microprocessor?
It has limitations on the size of data. Most Microprocessor does not support floating-point operations.
What is the difference between primary & secondary storage device?
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM.
Secondary devices are: Floppy disc / Hard disk.
Difference between SRAM and DRAM?
Static RAM: No refreshing, 6 to 8 MOS transistors are required to form one memory cell, Information stored as voltage level in a flip flop.
Dynamic RAM: Refreshed periodically, 3 to 4 transistors are required to form one memory cell, Information is stored as a charge in the gate to substrate capacitance.
What is an interrupt?
Interrupt is a signal send by external device to the processor so as to request the processor to perform a particular work.
What are the different types of interrupts?
Maskable and Non-maskable interrupts.
What is cache memory?
Cache memory is a small high-speed memory. It is used for temporary storage of data & information between the main memory and the CPU (center processing unit). The cache memory is only in RAM.
Expand DMA?
Direct Memory Access
Differentiate between RAM and ROM?
RAM: Random Access Memory. Read / Write memory, High Speed, Volatile Memory. ROM: Read only memory, Low Speed, Non Volatile Memory
What is NV-RAM?
Nonvolatile Read Access Memory, also called Flash memory.
What is a flag?
Flag is a flip-flop used to store the information about the status of a processor and the status of the instruction executed most recently
What are the flags in 8086?
In 8086 Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace flag, Interrupt flag, Direction flag, and Sign flag.
What is meant by Maskable interrupt?
An interrupt that can be turned off by the programmer is known as Maskable interrupt.
What is Non-Maskable interrupt?
An interrupt which can be never be turned off (ie.disabled) is known as Non-Maskable interrupt.
Which interrupts are generally used for critical events?
Non-Maskable interrupts are used in critical events. Such as Power failure, Emergency, Shut off etc.
Give examples for Maskable interrupts?
RST 7.5, RST6.5, RST5.5 are Maskable interrupts
Give example for Non-Maskable interrupts?
Trap is known as Non-Maskable interrupts, which is used in emergency condition.
What are the various segment registers in 8086?
Code, Data, Stack, Extra Segment registers in 8086.
Which Stack is used in 8086?
FIFO (First In First Out) stack is used in 8086.In this type of Stack the first stored information is retrieved first.
What is SIM and RIM instructions?
SIM is Set Interrupt Mask. Used to mask the hardware interrupts.
RIM is Read Interrupt Mask. Used to check whether the interrupt is Masked or not.
What is Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Give an example of one address microprocessor?
8085 is a one address microprocessor.
In what way interrupts are classified in 8085?
In 8085 the interrupts are classified as Hardware and Software interrupts.
What are Hardware interrupts?
TRAP, RST7.5, RST6.5, RST5.5, INTR.
What are Software interrupts?
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
Which interrupt has the highest priority?
TRAP has the highest priority.
Name 5 different addressing modes?
Immediate, Direct, Register, Register indirect, Implied addressing modes.
How many interrupts are there in 8085?
There are 12 interrupts in 8085.
What is the RST
for the TRAP?
RST 4.5 is called as TRAP.
In 8085 which is called as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.
RST 4.5 is called as TRAP.
In 8085 which is called as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.
1. What is a Microprocessor?
Answer
Answer
A microprocessor is a programmable digital electronic component that incorporates the functions of a central processing unit (CPU) on a single semi conducting integrated circuit (IC). Instructions are fetched from memory, the they are decoded, and finally executed.
2. Why does microprocessor contain ROM chips?
Answer
Microprocessor uses ROM chips to store instructions, which are used to execute data.
3. What is the difference between a microprocessor and a microcontroller?
Answer
Microprocessor contains more op-codes, and few bit handling instructions. Where as a microcontroller contains few op-codes and more bit handling instructions. It can be called as a computer on a chip. In addition to all arithmetic and logic elements of a general purpose microprocessor, the microcontroller usually also integrates additional elements such as read-only and read-write memory, and input/output interfaces.
4. Give examples for 8, 16, and 32 bit microprocessors.
Answer
8-bit processors: MC6800, Intel 8008, Intel 8080, Z80.
16-bit processors: MC68000, Intel 8086.
32-bit processors: Intel 80386, Intel 80486, Z8000.
5. Give an example of a microprocessor, whose structure is pipelined.
Answer
All x86 processors have pipelined structure. Intel 8086, Intel 80386, etc.
6. What is flag? Give some examples of a flag.
Answer
7. What are most common registers present in a microprocessor?
Answer
Accumulator registers, Data registers, Temporary registers, Instruction registers, Stack Pointer, Program Counter and Condition Code Register.
8. Why is address bus unidirectional?
Answer
The address bus is unidirectional because the address is always given by the microprocessor, to address a memory location of an I/O device. Only microprocessor can write a value onto address bus, I/O devices can only read address bus.
9. Why is data bus bidirectional?
Answer
The data bus is bidirectional because the it is used by microprocessor, memory units, and I/O devices for both to transfer and receive data.
10. Expand RAM, ROM, PROM, EPROM, EEPROM.
Answer
RAM: Random Access Memory.
ROM: Read Only Memory.
PROM: Programmable Read Only Memory.
EPROM: Erasable Programmable Read Only Memory..
EEPROM: Electrically Erasable Programmable Read Only Memory.
8085
questions and answers
1. What are the various
registers in 8085?
- Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085 .
2. In 8085 name the 16 bit registers?
- Stack pointer and Program counter all have 16 bits.
3. What are the various flags used in 8085?
- Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag.
4. What is Stack Pointer?
- Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
5. What is Program counter?
- Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
6. Which Stack is used in 8085?
- LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
7. What happens when HLT instruction is executed in processor?
- The Micro Processor enters into Halt-State and the buses are tri-stated.
8. What is meant by a bus?
- A bus is a group of conducting lines that carriers data, address, & control signals.
9. What is Tri-state logic?
- Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
10. Give an example of one address microprocessor?
- 8085 is a one address microprocessor.
11. In what way interrupts are classified in 8085?
- In 8085 the interrupts are classified as Hardware and Software interrupts.
12. What are Hardware interrupts?
- TRAP, RST7.5, RST6.5, RST5.5, INTR.
13. What are Software interrupts?
- RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
14. Which interrupt has the highest priority?
- TRAP has the highest priority.
15. Name 5 different addressing modes?
- Immediate, Direct, Register, Register indirect, Implied addressing modes.
16. How many interrupts are there in 8085?
- There are 12 interrupts in 8085.
17. What is clock frequency for 8085?
- 3 MHz is the maximum clock frequency for 8085.
18. What is the RST for the TRAP?
- RST 4.5 is called as TRAP.
19. In 8085 which is called as High order / Low order Register? - Flag is called as Low order register & Accumulator is called as High order Register.
20. What are input & output devices?
- Keyboards, Floppy disk are the examples of input devices. Printer, LED / LCD display, CRT Monitor are the examples of output devices.
21. Can an RC circuit be used as clock source for 8085?
- Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal.
22. Why crystal is a preferred clock source?
- Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
23. Which interrupt is not level-sensitive in 8085?
- RST 7.5 is a raising edge-triggering interrupt.
24. What does Quality factor mean?
- The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
25. What are level-triggering interrupt?
- RST 6.5 & RST 5.5 are level-triggering interrupts
- Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085 .
2. In 8085 name the 16 bit registers?
- Stack pointer and Program counter all have 16 bits.
3. What are the various flags used in 8085?
- Sign flag, Zero flag, Auxillary flag, Parity flag, Carry flag.
4. What is Stack Pointer?
- Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
5. What is Program counter?
- Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
6. Which Stack is used in 8085?
- LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
7. What happens when HLT instruction is executed in processor?
- The Micro Processor enters into Halt-State and the buses are tri-stated.
8. What is meant by a bus?
- A bus is a group of conducting lines that carriers data, address, & control signals.
9. What is Tri-state logic?
- Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
10. Give an example of one address microprocessor?
- 8085 is a one address microprocessor.
11. In what way interrupts are classified in 8085?
- In 8085 the interrupts are classified as Hardware and Software interrupts.
12. What are Hardware interrupts?
- TRAP, RST7.5, RST6.5, RST5.5, INTR.
13. What are Software interrupts?
- RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
14. Which interrupt has the highest priority?
- TRAP has the highest priority.
15. Name 5 different addressing modes?
- Immediate, Direct, Register, Register indirect, Implied addressing modes.
16. How many interrupts are there in 8085?
- There are 12 interrupts in 8085.
17. What is clock frequency for 8085?
- 3 MHz is the maximum clock frequency for 8085.
18. What is the RST for the TRAP?
- RST 4.5 is called as TRAP.
19. In 8085 which is called as High order / Low order Register? - Flag is called as Low order register & Accumulator is called as High order Register.
20. What are input & output devices?
- Keyboards, Floppy disk are the examples of input devices. Printer, LED / LCD display, CRT Monitor are the examples of output devices.
21. Can an RC circuit be used as clock source for 8085?
- Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal.
22. Why crystal is a preferred clock source?
- Because of high stability, large Q (Quality Factor) & the frequency that doesn’t drift with aging. Crystal is used as a clock source most of the times.
23. Which interrupt is not level-sensitive in 8085?
- RST 7.5 is a raising edge-triggering interrupt.
24. What does Quality factor mean?
- The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
25. What are level-triggering interrupt?
- RST 6.5 & RST 5.5 are level-triggering interrupts
· 26.Which Stack is used in
8085?LIFO (Last In First Out) stack is used in 8085.In this type of
Stack the last stored information can be...
·
· 27.What are the various registers in
8085?Accumulator register, Temporary register, Instruction register,
Stack Pointer, Program Counter are the various registers in 8085...
·
· 28.What
are the various registers in 8085?Accumulator register,
Temporary register, Instruction register, Stack Pointer, Program Counter are
the various registers in 8085...
·
· 29.In 8085 name the 16 bit registers?Stack
pointer and Program counter all have 16 bits....
·
· 30.What is Stack Pointer?Stack
pointer is a special purpose 16-bit register in the Microprocessor, which holds
the address of the top of the...
·
· 31.Which
StacWhich Stack is used in 8086? k is used in 8086?FIFO
(First In First Out) stack is used in 8086.In this type of Stack the first
stored information is retrieved...
·
· 32.How
can I handle a destructor that fails?Write a
message to a log-file. But do not throw an exception. The C++ rule is that you
must never throw...
·
· 33.In
what way interrupts are classified in 8085?In 8085
the interrupts are classified as Hardware and Software interrupts....
·
· 34.What
method is used to place a value onto the top of a stack?push()
method, Push is the direction that data is being added to the stack. push()
member method places a value...
·
· 35.What
is clock frequency for 8085?3 MHz is the maximum clock
frequency for 8085....
36.What is clock frequency
for 8085?
3 MHz is the maximum clock frequency for 8085.
3 MHz is the maximum clock frequency for 8085.
37.Give an example of one
address microprocessor?
8085 is a one address microprocessor.
8085 is a one address microprocessor.
38.Give examples for 8 / 16
/ 32 bit Microprocessor?
8-bit Processor - 8085 / Z80 / 6800; 16-bit Processor - 8086 / 68000 / Z8000; 32-bit processor - 80386 / 80486
8-bit Processor - 8085 / Z80 / 6800; 16-bit Processor - 8086 / 68000 / Z8000; 32-bit processor - 80386 / 80486
39.What is meant by a bus?
A bus is a group of conducting lines that carriers data, address, & control signals.
A bus is a group of conducting lines that carriers data, address, & control signals.
40.What are the various
registers in 8085?
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085
41.Why crystal is a
preferred clock source?
Because of high stability, large Q (Quality Factor) & the frequency that doesn?t drift with aging. Crystal is used as a clock source most of the times.
Because of high stability, large Q (Quality Factor) & the frequency that doesn?t drift with aging. Crystal is used as a clock source most of the times.
42.In 8085 which is called
as High order / Low order Register?
Flag is called as Low order register & Accumulator is called as High order Register.
Flag is called as Low order register & Accumulator is called as High order Register.
43.Name 5 different
addressing modes?
Immediate, Direct, Register, Register indirect, Implied addressing modes
Immediate, Direct, Register, Register indirect, Implied addressing modes
44.In what way interrupts
are classified in 8085?
In 8085 the interrupts are classified as Hardware and Software interrupts.
In 8085 the interrupts are classified as Hardware and Software interrupts.
45.What is the difference
between primary & secondary storage device?
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk.
In primary storage device the storage capacity is limited. It has a volatile memory. In secondary storage device the storage capacity is larger. It is a nonvolatile memory. Primary devices are: RAM / ROM. Secondary devices are: Floppy disc / Hard disk.
46.Which Stack is used in
8085?
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
LIFO (Last In First Out) stack is used in 8085.In this type of Stack the last stored information can be retrieved first.
47.What is Program counter?
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
Program counter holds the address of either the first byte of the next instruction to be fetched for execution or the address of the next byte of a multi byte instruction, which has not been completely fetched. In both the cases it gets incremented automatically one by one as the instruction bytes get fetched. Also Program register keeps the address of the next instruction.
48.What is the RST for the
TRAP?
RST 4.5 is called as TRAP.
RST 4.5 is called as TRAP.
49.What are
level-triggering interrupt?
RST 6.5 & RST 5.5 are level-triggering interrupts.
RST 6.5 & RST 5.5 are level-triggering interrupts.
50.Which interrupt is not
level-sensitive in 8085?
RST 7.5 is a raising edge-triggering interrupt.
RST 7.5 is a raising edge-triggering interrupt.
51.What are Software
interrupts?
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
RST0, RST1, RST2, RST3, RST4, RST5, RST6, RST7.
52.What are the various
flags used in 8085?
Sign flag, Zero flag, Auxiliary flag, Parity flag, Carry flag.
Sign flag, Zero flag, Auxiliary flag, Parity flag, Carry flag.
53.In 8085 name the 16 bit
registers?
Stack pointer and Program counter all have 16 bits.
Stack pointer and Program counter all have 16 bits.
54.What is Stack Pointer?
Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address of the top of the stack.
55.What happens when HLT
instruction is executed in processor?
The Micro Processor enters into Halt-State and the buses are tri-stated.
The Micro Processor enters into Halt-State and the buses are tri-stated.
56.What does Quality factor
mean?
The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
57.How many interrupts are
there in 8085?
There are 12 interrupts in 8085.
There are 12 interrupts in 8085.
58.What is Tri-state logic?
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
Three Logic Levels are used and they are High, Low, High impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.
59.Which interrupt has the
highest priority?
TRAP has the highest priority
TRAP has the highest priority
60.What are Hardware
interrupts?
TRAP, RST7.5, RST6.5, RST5.5, INTR
TRAP, RST7.5, RST6.5, RST5.5, INTR
61.Can an RC circuit be
used as clock source for 8085?
Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal
Yes, it can be used, if an accurate clock frequency is not required. Also, the component cost is low compared to LC or Crystal
8086
questions and answers
- What
is a Microprocessor? - Microprocessor is a
program-controlled device, which fetches the instructions from memory,
decodes and executes the instructions. Most Micro Processor are single-
chip devices.
- Give
examples for 8 / 16 / 32 bit Microprocessor? -
8-bit Processor - 8085 / Z80 / 6800; 16-bit Processor - 8086 / 68000 /
Z8000; 32-bit Processor - 80386 / 80486.
- Why
8085 processor is called an 8 bit processor? -
Because 8085 processor has 8 bit ALU (Arithmetic Logic Review). Similarly
8086 processor has 16 bit ALU.
- What
is 1st / 2nd / 3rd / 4th generation processor? -
The processor made of PMOS / NMOS / HMOS / HCMOS technology is called 1st
/ 2nd / 3rd / 4th generation processor, and it is made up of 4 / 8 / 16 /
32 bits.
- Define
HCMOS? -
High-density n- type Complimentary Metal Oxide Silicon field effect
transistor.
- What
does microprocessor speed depend on? - The
processing speed depends on DATA BUS WIDTH.
- Is
the address bus unidirectional? - The address bus is
unidirectional because the address information is always given by the
Micro Processor to address a memory location of an input / output devices.
- Is
the data bus is Bi-directional? - The data bus is
Bi-directional because the same bus is used for transfer of data between
Micro Processor and memory or input / output devices in both the
direction.
- What
is the disadvantage of microprocessor? - It has
limitations on the size of data. Most Microprocessor does not support
floating-point operations.
- What
is the difference between microprocessor and microcontroller? -
In Microprocessor more op-codes, few bit handling instructions. But in
Microcontroller: fewer op-codes, more bit handling Instructions, and also
it is defined as a device that includes micro processor, memory, &
input / output signal lines on a single chip.
- What
is meant by LATCH? - Latch is a D- type
flip-flop used as a temporary storage device controlled by a timing signal,
which can store 0 or 1. The primary function of a Latch is data storage.
It is used in output devices such as LED, to hold the data for display.
- Why
does microprocessor contain ROM chips? -
Microprocessor contain ROM chip because it contain instructions to execute
data.
- What
is the difference between primary & secondary storage device? -
In primary storage device the storage capacity is limited. It has a
volatile memory. In secondary storage device the storage capacity is
larger. It is a nonvolatile memory. Primary devices are: RAM / ROM.
Secondary devices are: Floppy disc / Hard disk.
- Difference
between static and dynamic RAM? - Static RAM: No refreshing,
6 to 8 MOS transistors are required to form one memory cell, Information
stored as voltage level in a flip flop. Dynamic RAM: Refreshed
periodically, 3 to 4 transistors are required to form one memory cell,
Information is stored as a charge in the gate to substrate capacitance.
- What
is interrupt? -
Interrupt is a signal send by external device to the processor so as to
request the processor to perform a particular work.
- What
is cache memory? -
Cache memory is a small high-speed memory. It is used for temporary
storage of data & information between the main memory and the CPU
(center processing unit). The cache memory is only in RAM.
- What
is called .Scratch pad of computer.? - Cache
Memory is scratch pad of computer.
- Which
transistor is used in each cell of EPROM? -
Floating .gate Avalanche Injection MOS (FAMOS) transistor is used in each
cell of EPROM.
- Differentiate
between RAM and ROM? - RAM: Read / Write memory,
High Speed, Volatile Memory. ROM: Read only memory, Low Speed, Non Voliate
Memory.
- What
is a compiler? -
Compiler is used to translate the high-level language program into machine
code at a time. It doesn.t require special instruction to store in a
memory, it stores automatically. The Execution time is less compared to
Interpreter.
- Which
processor structure is pipelined? - All x86 processors have
pipelined structure.
- What
is flag? -
Flag is a flip-flop used to store the information about the status of a
processor and the status of the instruction executed most recently
- What
is stack? -
Stack is a portion of RAM used for saving the content of Program Counter
and general purpose registers.
- Can
ROM be used as stack? - ROM cannot be used as
stack because it is not possible to write to ROM.
- What
is NV-RAM? -
Nonvolatile Read Write Memory, also called Flash memory. It is also know
as shadow RAM.
Interview Questions on
Microprocessor:-
1) What type of
architecture used in 8085 microprocessor?Interview Questions on Microprocessor
8085
Ans. 8085 has Von
Neumann architecture. It is named after the mathematician John
Von Neumann. It is based on the concept of stored program control.
In this architecture both the data and the program is stored in the same
memory.
2) What is the
function of accumulator?Interview Questions on Microprocessor 8085
Ans. Accumulator is
an 8 bit register which stores data and performs arithmetic and logical
operations. The result of the operation is stored in the accumulator. It is
designated by the letter ‘A’.
3) What are the
different types of flags in 8085 microprocessor?Interview Questions on
Microprocessor 8085
Ans. There are 5 different
flags in 8085 microprocessor. Though the flag register is of 8 bit but 3 bits
are not in use. Only 5 bits are used for the different flags. They are:-
a) Sign flag(s)-
This is designated by the letter ‘S’. If sign bit is 1 then the sign flag is
set to 1 and if the sign bit is zero then sign flag is reset to zero.
b) Zero flag(z)-
This is designated by the letter ‘z’. If the result of any arithmetic or
logical operation is zero i.e. all the bits are zero then zero flag is set to 1
else it is set to zero.
c) Auxiliary
carry- (AC) This flag is set to 1 only when any intermediate carry is
produced. Else it is reset to 0.
d) Parity
flag (P) – when the result of any operation has odd number of ones
then parity flag is set to 1 else if it has even number of ones then it is
reset to 0.
e) Carry flag(C)
– this flag is set to 1 only when a carry is produced in the result i.e. the
carry bit is 1 else if the carry bit is zero then the flag is reset to zero.
4) What are
the types of general purpose registers in 8085?
Ans. There are 6 general
purpose registers in 8085 microprocessor. They are designated by the letters –
B, C, D, E, H, and L. These are 8 bit registers and are used to store data
temporarily during the execution of any program. These registers can also be
used to store 16 bit data by using them in pairs i.e. BC, DE and HL. These
pairs cannot be changed as B cannot pair with any other register other than C.
5) What is
the length of stack pointer in 8085 microprocessor? And what is its use?
Interview Sample paper question answer on 8085 Microprocessor.
Ans. stack pointer is of
16 bits length and is used to point to the value at top of the stack for the
currently executed instruction.
6) What is
the memory size of 8085 microprocessor? Placement Interview Sample paper
question answer on 8085 Microprocessor
Ans. 8085 has 8 data
lines and 16 address lines. The memory size of any microprocessor depends on
the number of address lines. The general formula is 2^n, where n= number of
address lines. For 8085 there are 2^16= 64 Kbytes memory size.
7) How many
bits is 8085 microprocessor? Sample Paper Interview question answer
Ans. Microprocessor is
named on the basis of number of data lines in it. 8085 is a bit microprocessor
as it has 8 bit data lines.
8) What are
the various interrupts in 8085 microprocessor? Which is the highest priority
interrupt? Important questions on Microprocessor 8085
There are 6 types of
interrupts in 8085. They are
a) TRAP
b) RST 7.5
c) RST 6.5
d) RST 5.5
e) INTR
f) Interrupt acknowledgment
(INTA(bar)).
TRAP has the highest
priority among all the interrupts.
9) Which type of
cycle is used for fetch and execute instruction? Sample Paper Interview
question answer
Ans.
Instruction cycle is used for the fetch and execute instruction.
In this cycle the
instruction is fetched, decoded and executed to produce the required output.
10) How
many address lines are there in 8085 microprocessor? Sample Paper Interview
question answer
Ans. There are 16 address
lines in 8085. They are multiplexed address and data lines. Address bus of 8085
is of 16 bits. During the first machine cycle these address lines are used as
data lines and in the next machine cycle all the 16 lines act as address lines.
The multiplexed 8 address
and data lines refer to lower order address bit and the rest 8 for higher order
address bits.
11) What is a Microprocessor?
Ans:- Microprocessor is a
program-controlled device, that fetches the instructions from memory, decode it
& executes the instructions. Generally Microprocessor are single- chip
devices.
12) Why crystal is being
preferred as a clock source?
Ans:- Reasons-high
stability, large Q (Quality Factor) & the frequency that doesn’t drift with
aging. so crystal is used as a clock source most of the times.
13) Name High order / Low
order Register in 8085 microprocessor?
Ans:-Flag is called Low
order register & Accumulator is called High order Register in 8085
microprocessor.
14) Describe Tri-state logic?
Ans:- Three Logic Levels
are used and they are known as High, Low, High impedance state. The high and
low are said to be normal logic levels where as high impedance state is
electrical open circuit conditions. Tri-state logic has a enable line as third
line
15) What will happen if HLT
instruction is executed in processor?
Ans:- The Micro Processor
will enter into Halt-State and the buses will be tri-stated.
16) Which Stack is used in 8085?
Ans:- LIFO (Last In First
Out) stack is used in 8085.In this type of Stack the information which is
stored last will be taken out or retrieved first.
17) Describe briefly Program
counter?
Ans:- Program counter
does either of the two things that is it holds the address of either the first
byte of the next instruction to be fetched for execution or the address of the
next byte of a multi byte instruction, which was not completely fetched. In
both the cases it is incremented automatically one by one as the instruction
bytes will be fetched. Program register also keeps the next instruction
address.
18) Name the 1st / 2nd / 3rd /
4th generation processor?
Ans:-The processor are
made of PMOS / NMOS / HMOS / HCMOS technology which is called 1st / 2nd /
3rd / 4th generation processor, and that is made up of 4 / 8 / 16 / 32
bits respectively.
19) Name the processor lines of two
major manufacturers?
Ans:- The Processor
lines names of two major manufacturers are as follows:- At High-end: Intel
– Pentium (II, III, IV), AMD – Athlon. At Low-end: Intel – Celeron, AMD –
Duron. 64-bit: Intel – Itanium 2, AMD – Opteron
20) Mention the speed and
device maximum specs for Firewire?
Ans:-IEEE 1394 (Firewire)
with speeds up to 400 Mbps can support the maximum of 63 connected devices
21) Where’s MBR located on the
disk?
Ans:- The place where MBR is situated is in sector 0, track 0,
head 0, cylinder 0 of the primary active partition.
22) Where does CPU Enhanced mode
originate from?
Ans:- Intel’s 80386 was
the first 32-bit processor, and so the company had to backward-support the
8086. All the modern Intel-based processors run in the enhanced mode which are
capable to switch in between real mode and protected mode, which is the current
mode of operation.
23) What are the types of buses?
Ans:- Three types of
buses are there:-
Address bus: It carries
the Address to the memory to fetch either instruction..
Data bus : It carries data from the memory.
Control bus : It carries the control signals like RD/WR, Select etc.
Data bus : It carries data from the memory.
Control bus : It carries the control signals like RD/WR, Select etc.
24) What does EU do?
Ans:- Execution Unit
receives both program instruction codes & data from Bus Interface Unit and
then executes these instructions and the result is being stored in registers.
25) Mention RST for the TRAP?
Ans:- RST 4.5
26) Can an RC circuit be used as
clock source for 8085?
Ans:-Yes,RC circuit can
be used as clock source if in case an accurate clock frequency is not required.
The cost of RC is low as compared to LC.
Microprocessor interview
questions on 8086
27) What are the types of flags in 8086?
Ans:- In 8086 there are 9 types of flags which are as follows
Carry flag, Parity flag, Auxiliary carry flag, Zero flag, Overflow flag, Trace
flag, Interrupt flag, Direction flag, and Sign flag.
28) What are the various interrupts in 8086?
28) What are the various interrupts in 8086?
Ans:- Two types of interrupts:-Maskable interrupts, Non-Maskable
interrupts.
29) What is meant by Maskable interrupts?
29) What is meant by Maskable interrupts?
Ans:- An interrupt that can be turned off by the programmer is
known as Maskable interrupts are those interrupts which can be turned off by
the programmer or can be ignored by the programmer.
30) What is Non-Maskable interrupts?
30) What is Non-Maskable interrupts?
Ans:- A processor interrupt which can be never be turned off
(i.e.disabled) or cannot be ignored by the programmer is known as Non-Maskable
interrupt.
31) Which interrupts are generally used for critical events?
31) Which interrupts are generally used for critical events?
Ans:- Non-Maskable interrupts are generally used in critical
events. For example- Power failure, Emergency, Shut off etc.
32) Give some examples for Maskable interrupts?
32) Give some examples for Maskable interrupts?
Ans:- Some examples for maskable interrupts are as follows:- RST
7.5, RST6.5, RST5.5
33) Give some example for Non-Maskable interrupts?
33) Give some example for Non-Maskable interrupts?
Ans:- Trap is called as Non-Maskable interrupts, which is used
during emergency condition.
34) What is the Maximum clock frequency in 8086?
34) What is the Maximum clock frequency in 8086?
Ans:- 5 Mhz
35) Name the various segment registers in 8086?
35) Name the various segment registers in 8086?
Ans:- The various segment registers in 8085 are- Code, Data,
Stack, Extra Segment registers.
36) Which Stack is used in 8086?
36) Which Stack is used in 8086?
Ans:- FIFO (First In First Out) stack is used in 8086.In this
type of Stack the information which is stored first is taken out or
retrieved first.
37) What is SIM and RIM instructions?
37) What is SIM and RIM instructions?
Ans:- SIM is Set Interrupt Mask. which is used to mask the
hardware interrupts. RIM is Read Interrupt Mask which is used to check whether
the interrupt is masked or not.
38) Which is the tool which is used to connect the user and the computer?
38) Which is the tool which is used to connect the user and the computer?
Ans:- Interpreter
39) What is the position of the Stack Pointer after the PUSH instruction?
39) What is the position of the Stack Pointer after the PUSH instruction?
Ans:- The address line is 02 less than the earlier value.
40) What is the position of the Stack Pointer after the POP instruction?
40) What is the position of the Stack Pointer after the POP instruction?
Ans:- The address line is
02 greater than the earlier value.
These are some of the
interview questions and answers on Microprocessor. If you want to add some
more, please mention in the comment section of the post.
