Computer Hardware and Software MCQs

Question 1

When referring to instruction words, a mnemonic is:

Accepted Answer

a short abbreviation for the operation to be performed

Answer

a short abbreviation for the operand address

Answer

a short abbreviation for the data word stored at the operand address

Answer

shorthand for machine language

Question 2

What is the difference between mnemonic codes and machine codes?

Accepted Answer

Machine codes are in binary, mnemonic codes are in shorthand English.

Answer

There is no difference.

Answer

Machine codes are in shorthand English, mnemonic codes are in binary.

Answer

Machine codes are in shorthand English, mnemonic codes are a high-level language.

Question 3

Which bus is bidirectional?

Accepted Answer

data bus

Answer

control bus

Answer

address bus

Answer

multiplexed bus

Question 4

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

Accepted Answer

assembly language programs

Answer

firmware

Answer

BASIC interpreter instructions

Answer

flowchart instructions

Question 5

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

Accepted Answer

microcomputer

Answer

CPU

Answer

compiler

Answer

ALU

Question 6

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

Accepted Answer

3

Answer

2

Answer

5

Answer

8

Question 7

Which of the following is not a computer bus?

Accepted Answer

timer bus

Answer

data bus

Answer

control bus

Answer

address bus

Question 8

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

Accepted Answer

memory-mapped I/O

Answer

wired I/O

Answer

I/O mapping

Answer

dedicated I/O

Question 9

How many bits are used in the data bus?

Accepted Answer

8

Answer

7

Answer

9

Answer

16