Computer Science questions and answers

Computer Science Questions and Answers

Challenge your competence level in computers, computing, algorithms, hardware and software with these Computer science questions and answers.

1.

Which of the following controls the way in which the computer system functions and provides a means by which users can interact with the computer

A.

CPU

B.

application software

C.

operating system

D.

ALU

Correct answer is C

Operating system controls the way in which the computer system functions and provides a means by which users can interact with the computer

2.

In computer architecture, the type of bus that connects the major components of a computer system is

A.

address

B.

data bus

C.

control bus

D.

system bus

Correct answer is D

In computer architecture, the system bus is the main communication route that connects the major components of a computer system, such as the CPU, memory, and input/output devices. It is composed of the data bus, address bus, and control bus. Therefore, the correct answer is 'system bus'.

3.

Using Boolean identities, reduce the given Boolean expression:
A(A+1) + A(B+0) + C.1

A.

A + B + C

B.

A.B.C

C.

A.B + C

D.

A + C

Correct answer is D

Using Boolean identities, the given Boolean expression A(A+1) + A(B+0) + C.1 can be reduced as follows: A.1 + A.B + C = A + A.B + C = A + C. The Boolean identity A + A.B = A is used here, which states that if A is true, the whole expression is true regardless of the value of B.

4.

The first stage of data processing activities is ?

A.

Manipulation

B.

Collection

C.

Conversion

D.

Sorting

Correct answer is B

The first stage of data processing is the collection or gathering of data and recording it in a usable form

5.

One of the following is not a good way to prevent virus

A.

encryption

B.

use of firewall

C.

carelessly exposing your vital and personal information

D.

use of antivirus software

Correct answer is C

Ways of preventing virus
- use of antivirus software
- use of firewall
- exercising care in giving out personal and vital information
- encryptions