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Computer Hardware and Software MCQ Questions & Answers

Computer Hardware and Software MCQs : This section focuses on the "Computer Hardware and Software". These Multiple Choice Questions (MCQs) should be practiced to improve the Computer Hardware and Software skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

How many bits are used in the data bus?

A. 7
B. 8
C. 9
D. 16

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Question 2

The technique of assigning a memory address to each I/O device in the SAM system is called:

A. wired I/O
B. I/O mapping
C. dedicated I/O
D. memory-mapped I/O

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Question 3

Which bus is bidirectional?

A. data bus
B. control bus
C. address bus
D. multiplexed bus

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Question 4

Exceptions to the 8085 microprocessor normal operation are called:

A. jump instructions
B. decoding
C. interrupts
D. jump instructions or interrupts

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Question 5

A microprocessor unit, a memory unit, and an input/output unit form a:

A. CPU
B. compiler
C. microcomputer
D. ALU

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Question 6

How many bits are used in the address bus?

A. 7
B. 8
C. 9
D. 16

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Question 7

A port can be:

A. strictly for input
B. strictly for output
C. bidirectional
D. all the above

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Question 8

The software used to drive microprocessor-based systems is called:

A. assembly language programs
B. firmware
C. BASIC interpreter instructions
D. flowchart instructions

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Question 9

How many buses are connected as part of the 8085 microprocessor?

A. 2
B. 3
C. 5
D. 8

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Question 10

Which of the following is not a computer bus?

A. data bus
B. timer bus
C. control bus
D. address bus

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Question 11

When referring to instruction words, a mnemonic is:

A. a short abbreviation for the operand address
B. a short abbreviation for the operation to be performed
C. a short abbreviation for the data word stored at the operand address
D. shorthand for machine language

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Question 12

What is the difference between mnemonic codes and machine codes?

A. There is no difference.
B. Machine codes are in binary, mnemonic codes are in shorthand English.
C. Machine codes are in shorthand English, mnemonic codes are in binary.
D. Machine codes are in shorthand English, mnemonic codes are a high-level language.

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Question 13

Which of the following is not a basic element within the microprocessor?

A. microcontroller
B. arithmetic-logic unit (ALU)
C. temporary register
D. accumulator

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