JAMB Computer Science Past Questions & Answers - Page 42

206.

__________________ is the conversion of computer data from one format to another.

A.

data conversion

B.

data implementation

C.

data transmission

D.

data transfer

Correct answer is A

Data conversion is the process of translating data from one format to another

207.

How are the stages of SDLC implemented?

A.

Randomly, without overlapping

B.

sequentially, without overlapping

C.

sequentially with overlapping

D.

randomly with overlapping

Correct answer is B

the stages of SDLC are executed sequentially in order to ensure it goes accordingly. Also, they must be done sequential to gets results from previous stages to know what to improve in later stages. Also it does not overlap because, a stage must be concluded before another proceeds

208.

The combination of the arithmetic and logic units, as well as the ______________ unit makes up the central processing unit

A.

input

B.

memory

C.

control

D.

1/0

Correct answer is C

The control unit manages and coordinates the operation of a computer system. The ALU is responsible for performing all the arithmetic and bitwise operations. Therefore, both these units combine to form the brain of the computer, ie CPU

209.

Which of the following is a computer not used for?

A.

entertainment

B.

information

C.

social media

D.

none of the above

Correct answer is D

Computer is used in almost every aspect. Hence, it is almost impossible to say there is an aspect where computer isn't used

210.

The joystick typically have a button on _________ used to select the option pointed by the cursor

A.

bottom

B.

left

C.

right

D.

top

Correct answer is D

The bottom is placed on top of the joystick