JAMB Computer Science Past Questions & Answers - Page 32

156.

What is the function of firewall?

A.

Service provider

B.

Cyber security

C.

Internet browser

D.

Storage device

Correct answer is B

Fire Wall could be either a software or hardware, but its major function is to help secure a computer system or website from hackers

157.

Which of the following is an example of software

A.

Joy stick

B.

Keyboard

C.

Operating systems

D.

Mouse

Correct answer is C

Operating system is the only example of software from the options

158.

Computer software can be classified into how many parts?

A.

3

B.

5

C.

2

D.

4

Correct answer is C

Computer software can be classified into two parts. These are : the system softwares and the application softwares

159.

The memory unit receives data and information from which unit?

A.

input unit

B.

output unit

C.

control unit

D.

arithmetic and logic unit

Correct answer is D

From the chart or table of data flow, the data moves from the input unit to the control unit where it is determined if it needs a logical or arithmetic function. From the control unit, it is passed on to the arithmetic and logical unit, where it is then processed before being transferred to the memory unit, to be stored till when needed

160.

The Domain name of a website is also its__________

A.

IP address

B.

TCP address

C.

Database system

D.

Network server

Correct answer is A

IP address. Usually, a domain name is used instead of an IP address, because the domain name is easier to work with, and is more human friendly that the IP address. Also, every domain is unique and has its IP address. Therefore, Domain names are used by computer uses, because the IP address is more complex to work with