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Microprocessor and Interfacing MCQ

1. In 8086 microprocessor the following has the highest priority among all type interrupts.

NMI

DIV 0

TYPE 255

OVER FLOW

Answer

Correct Answer: NMI

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2. In 8086, Example for Non maskable interrupts are

Trap

RST6.5

INTR

None of these

Answer

Correct Answer: Trap

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3. RIM is used to check whether, ______

The write operation is done or not

The interrupt is Masked or not

A & b

None of these

Answer

Correct Answer: The interrupt is Masked or not

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4. What is SIM?

Select Interrupt Mask

Sorting Interrupt Mask

Set Interrupt Mask.

None of these

Answer

Correct Answer: Set Interrupt Mask.

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5. Which stack is used in 8085?

FIFO

LIFO

FILO

None of these

Answer

Correct Answer: LIFO

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6. What are level Triggering interrupts?

INTR&TRAP

RST6.5&RST5.5

RST7.5&RST6.5

None of these

Answer

Correct Answer: RST6.5&RST5.5

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7. In 8085 name the 16 bit registers?

Stack pointer

Program counter

A & b

None of these

Answer

Correct Answer: A & b

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8. Which interrupt has the highest priority?

INTR

TRAP

RST6.5

None of these

Answer

Correct Answer: TRAP

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9. The external device is connected to a pin called the ______ pin on the processor chip

Interrupt

Transfer

Both

None of these

Answer

Correct Answer: Interrupt

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10. The standard I/O is also called

Isolated I/O

Parallel I/O

Both a and b

None of these

Answer

Correct Answer: Isolated I/O

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11. The microcomputer system by using the ____device interface

Input

Output

Both A and B

None of these

Answer

Correct Answer: Both A and B

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12. The ____ place the data from a register onto the data bus

CPU

ALU

Both A and B

None of these

Answer

Correct Answer: CPU

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13. DMA stands for

Direct memory access

Direct memory allocation

Data memory access

Data memory allocation

Answer

Correct Answer: Direct memory access

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14. Which are the READ operation can in simple steps

Address

Data

Control

All of these

Answer

Correct Answer: All of these

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15. MDR stands for

Memory data register

Memory data recode

Micro data register

None of these

Answer

Correct Answer: Memory data register

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16. MAR stands for

Memory address register

Memory address recode

Micro address register

None of these

Answer

Correct Answer: Memory address register

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17. WE stands for

Write enable

Wrote enable

Write envy

None of these

Answer

Correct Answer: Write enable

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18. CS stands for:

Cable select

Chip select

Control select

Cable system

Answer

Correct Answer: Chip select

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19. When memory write or I/O read are active data is from the processor:

Input

Output

Processor

None of these

Answer

Correct Answer: Output

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20. When memory read or I/O read are active data is to the processor :

Input

Output

Processor

None of these

Answer

Correct Answer: Input

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21. Which bus transfer singles from the CPU to external device and others that carry singles from external device to the CPU:

Control bus

Data bus

Address bus

None of these

Answer

Correct Answer: Control bus

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22. CPU can read & write data by using :

Control bus

Data bus

Address bus

None of these

Answer

Correct Answer: Data bus

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23. A 16 bit address bus can generate___ addresses:

32767

25652

65536

None of these

Answer

Correct Answer: 65536

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24. Which bus carry addresses:

System bus

Address bus

Control bus

Data bus

Answer

Correct Answer: Address bus

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25. The external system bus architecture is created using from ______ architecture:

Pascal

Dennis Ritchie

Charles Babbage

Von Neumann

Answer

Correct Answer: Von Neumann

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26. _____ a subsystem that transfer data between computer components inside a computer or between computer:

Chip

Processor

Bus

Answer

Correct Answer: Bus

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27. MSD stands for:

Least significant digit

Most significant digit

Medium significant digit

Low significant digit

Answer

Correct Answer: Most significant digit

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28. The left side of any binary number is called:

Least significant digit

Most significant digit

Medium significant digit

Low significant digit

Answer

Correct Answer: Most significant digit

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29. A nibble can be represented in the from of:

Octal digit

Decimal

Hexadecimal

None of these

Answer

Correct Answer: Hexadecimal

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30. The 16 bit register is separated into groups of 4 bit where each groups is called:

BCD

Nibble

Half byte

None of these

Answer

Correct Answer: Nibble

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31. How many bit stored by status register:

1 bit

4 bit

6 bit

8 bit

Answer

Correct Answer: 1 bit

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32. SP stand for:

Stack pointer

Stack pop

Stack push

None of these

Answer

Correct Answer: Stack pointer

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33. Which is the basic stack operation:

PUSH

POP

BOTH A and B

None of these

Answer

Correct Answer: BOTH A and B

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34. Stack words on:

LILO

LIFO

FIFO

None of these

Answer

Correct Answer: LIFO

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35. The processor uses the stack to keep track of where the items are stored on it this by using the:

Stack pointer register

Queue pointer register

Both a & b

None of these

Answer

Correct Answer: Stack pointer register

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36. The area of memory with addresses near zero are called:

High memory

Mid memory

Memory

Low memory

Answer

Correct Answer: Low memory

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37. The status register is also called the____:

Condition code register

Flag register

A and B

None of these

Answer

Correct Answer: A and B

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38. In which register instruction is decoded prepared and ultimately executed:

Instruction register

Current register

Both a and b

None of these

Answer

Correct Answer: Instruction register

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39. _________ Stores the instruction currently being executed:

Instruction register

Current register

Both a and b

None of these

Answer

Correct Answer: Instruction register

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40. The overflow is operand by:

Answer

Correct Answer: O

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41. The zero is operand by:

Answer

Correct Answer: Z

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42. The sign is operand by:

Answer

Correct Answer: S

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43. The carry is operand by:

Answer

Correct Answer: C

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44. Which are the flags of status register:

Over flow flag

Carry flag

Half carry flag

Zero flag

All of these

Answer

Correct Answer: All of these

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45. LA stands for:

Load accumulator

Least accumulator

Last accumulator

None of these

Answer

Correct Answer: Load accumulator

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46. Single address computer instruction has two parts:

The operation code

The operand

A and B

None of these

Answer

Correct Answer: A and B

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47. How many parts of single address computer instruction :

Answer

Correct Answer: 2

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48. How many bit of instruction on our simple computer consist of one____:

2‐bit

6‐bit

12‐bit

None of these

Answer

Correct Answer: 12‐bit

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49. The act of acquiring an instruction is referred as the____ the instruction:

Fetching

Fetch cycle

Both a and b

None of these

Answer

Correct Answer: Fetching

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50. SP stands for:

Status pointer

Stack pointer

A and b

None of these

Answer

Correct Answer: Stack pointer

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51. IR stands for:

Intel register

In counter register

Index register

Instruction register

Answer

Correct Answer: Instruction register

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52. PC stands for:

Program counter

Points counter

Paragraph counter

Paint counter

Answer

Correct Answer: Program counter

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53. Which register is a temporary storage location:

General purpose register

Dedicated register

A and B

None of these

Answer

Correct Answer: A and B

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54. In Microprocessor one of the operands holds a special register called:

Calculator

Dedicated

Accumulator

None of these

Answer

Correct Answer: Accumulator

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55. The register section is related to______ of the computer:

Processing

ALU

Main memory

None of these

Answer

Correct Answer: Main memory

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56. In which form CPU provide output:

Computer signals

Digital signals

Metal signals

None of these

Answer

Correct Answer: Digital signals

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57. MOS stands for:

Metal oxide semiconductor

Memory oxide semiconductor

Metal oxide select

None of these

Answer

Correct Answer: Metal oxide semiconductor

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58. Which technology using the microprocessor is fabricated on a single chip:

POS

MOS

ALU

ABM

Answer

Correct Answer: MOS

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59. Which is the brain of computer:

ALU

CPU

None of these

Answer

Correct Answer: CPU

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60. A computer consists of

A central processing unit

A memory

Input and output unit

All of the above

Answer

Correct Answer: All of the above

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61. The metal disks, which are permanently housed in, sealed and contamination free containers are called

Hard disks

Floppy disk

Winchester disk

Flexible disk

Answer

Correct Answer: Winchester disk

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62. The silicon chips used for data processing are called

RAM chips

ROM chips

Micro processors

PROM chips

Answer

Correct Answer: PROM chips

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63. An error in computer data is called

Chip

Bug

CPU

Storage device

Answer

Correct Answer: Bug

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64. A 32 bit microprocessor has the word length equal to

2 byte

32 byte

4 byte

8 byte

Answer

Correct Answer: 4 byte

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65. Which of the following memories has the shortest access times?

Cache memory

Magnetic bubble memory

Magnetic core memory

RAM

Answer

Correct Answer: Cache memory

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66. Which of the following memories allows simultaneous read and write operations?

ROM

RAM

EPROM

None of above

Answer

Correct Answer: RAM

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67. The secondary storage devices can only store data but they cannot perform

Arithmetic Operation

Logic operation

Fetch operations

Either of the above

Answer

Correct Answer: Either of the above

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68. What is the responsibility of the logical unit in the CPU of a computer?

To produce result

To compare numbers

To control flow of information

To do math’s works

Answer

Correct Answer: To compare numbers

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69. Can you tell what passes into and out from the computer via its ports?

Data

Bytes

Graphics

Pictures

Answer

Correct Answer: Data

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70. Current SIMMs have either … or … connectors (pins)

9 or 32

30 or 70

28 or 72

30 or 72

Answer

Correct Answer: 30 or 72

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71. A/n …. Device is any device that provides information, which is sent to the CPU

Input

Output

CPU

Memory

Answer

Correct Answer: Input

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72. The term gigabyte refers to

1024 bytes

1024 kilobytes

1024 megabytes

1024 gigabyte

Answer

Correct Answer: 1024 megabytes

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73. A directly accessible appointment calendar is feature of a … resident package

CPU

Memory

Buffer

ALU

Answer

Correct Answer: Memory

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74. To locate a data item for storage is

Field

Feed

Database

Fetch

Answer

Correct Answer: Fetch

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75. Which of the following is used for manufacturing chips?

Control bus

Control unit

Parity unit

Semiconductor

Answer

Correct Answer: Semiconductor

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76. Which of the following terms is the most closely related to main memory?

Non volatile

Permanent

Control unit

Temporary

Answer

Correct Answer: Temporary

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77. The first digital computer built with IC chips was known as

IBM 7090

Apple – 1

IBM System / 360

VAX‐10

Answer

Correct Answer: IBM System / 360

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78. The ALU of a computer normally contains a number of high speed storage element called

Semiconductor memory

Registers

Hard disks

Magnetic disk

Answer

Correct Answer: Registers

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79. The instructions for starting the computer are house on

Random access memory

CD‐Rom

Read only memory chip

All of above

Answer

Correct Answer: Read only memory chip

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80. What are the three decisions making operations performed by the ALU of a computer?

Grater than

Less than

Equal to

All of the above

Answer

Correct Answer: All of the above

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81. The word length of a computer is measured in

Bytes

Millimeters

Meters

Bits

Answer

Correct Answer: Bits

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82. A typical personal computer used for business purposes would have… of RAM.

4 KB

16 K

64 K

256 K

Answer

Correct Answer: 256 K

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83. Which company is the biggest player in the microprocessor industry?

Motorola

IBM

Intel

AMD

Answer

Correct Answer: Intel

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84. Before a disk can be used to store data. It must be…….

Formatted

Reformatted

Addressed

None of the above

Answer

Correct Answer: Formatted

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85. What type of memory is not directly addressable by the CPU and requires special softw3are called EMS (expanded memory specification)?

Extended

Expanded

Base

Conventional

Answer

Correct Answer: Expanded

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86. Which is the type of memory for information that does not change on your computer?

RAM

ROM

ERAM

RW / RAM

Answer

Correct Answer: ROM

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87. The Width of a processor’s data path is measured in bits. Which of the following are common data paths?

8 bits

12 bits

16 bits

32 bits

Answer

Correct Answer: 8 bits

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88. Which of the following items are examples of storage devices?

Floppy / hard disks

CD‐ROMs

Tape devices

All of the above

Answer

Correct Answer: All of the above

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89. Most important advantage of an IC is its

Easy replacement in case of circuit failure

Extremely high reliability

Reduced cost

Low powers consumption

Answer

Correct Answer: Extremely high reliability

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90. An integrated circuit is

A complicated circuit

An integrating device

Much costlier than a single transistor

Fabricated on a tiny silicon chip

Answer

Correct Answer: Fabricated on a tiny silicon chip

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91. The first microprocessor built by the Intel Corporation was called

8008

8080

4004

8800

Answer

Correct Answer: 4004

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92. One of the main feature that distinguish microprocessors from micro‐computers is

Words are usually larger in microprocessors

Words are shorter in microprocessors

Microprocessor does not contain I/O devices

Exactly the same as the machine cycle time

Answer

Correct Answer: Microprocessor does not contain I/O devices

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93. Registers, which are partially visible to users and used to hold conditional, are known as

Memory address registers

General purpose register

Flags

Answer

Correct Answer: General purpose register

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94. Which of the following memory medium is not used as main memory system?

Magnetic core

Semiconductor

Magnetic tape

Both a and b

Answer

Correct Answer: Magnetic tape

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95. The memory which is programmed at the time it is manufactured

PROM

RAM

PROM

EPROM

Answer

Correct Answer: PROM

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96. Which of the following memories needs refresh?

SRAM

DRAM

ROM

All of above

Answer

Correct Answer: DRAM

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97. Which of the following is used as a primary storage device?

Magnetic drum

PROM

Floppy disk

All of these

Answer

Correct Answer: PROM

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98. The language that the computer can understand and execute is called

Machine language

Application software

System program

All of the above

Answer

Correct Answer: Machine language

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99. Different components n the motherboard of a PC unit are linked together by sets of parallel electrical conducting lines. What are these lines called?

Conductors

Buses

Connectors

Consecutives

Answer

Correct Answer: Buses

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100. Which of the following are the two main components of the CPU?

Control Unit and Registers

Registers and Main Memory

Control unit and ALU

ALU and bus

Answer

Correct Answer: Control unit and ALU

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101. INTR: it implies the__________ signal:

INTRRUPT REQUEST

INTRRUPT RIGHT

INTRRUPT RONGH

INTRRUPT RESET

Answer

Correct Answer: INTRRUPT REQUEST

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102. Which is responsible for all the outside world communication by the microprocessor:

BIU

PIU

TIU

LIU

Answer

Correct Answer: BIU

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103. Which causes the microprocessor to immediately terminate its present activity:

RESET signal

INTERUPT signal

Both

None of these

Answer

Correct Answer: RESET signal

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104. Microprocessor reference that are not available in the cache are called_________:

Cache hits

Cache line

Cache misses

Cache memory

Answer

Correct Answer: Cache misses

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105. Microprocessor reference that are available in the cache are called______:

Cache hits

Cache line

Cache memory

All of these

Answer

Correct Answer: Cache hits

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Mechatronics Engineering MCQs | Topic-wise

MCQ on Applied Mechanics & Industrial Robotics	MCQ on Basic Mechatronics Engineering
MCQ on C Programming	MCQ on Digital Systems Design
MCQ on Elementary Machine Design	MCQ on Microprocessor and Interfacing
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