JAMB Computer Science Past Questions & Answers - Page 25

121.

Which of the following software can't be categorized as an application software?

A.

DBM

B.

MS-DOS

C.

Spreadsheet

D.

word processor

Correct answer is B

MS-DOS can't be classified as an application software because, it is an operating system software. And OS are classified as system software not application software

122.

A half byte is known as ________

A.

data

B.

bit

C.

half byte

D.

nibble

Correct answer is D

A nibble is a 4 bit aggression, or half an octet. It has 16 possible values, and can be represented by a single hexadecimal digit which are called hex digit

123.

Which of the memories must be refreshed many times per second?

A.

EPROM

B.

ROM

C.

Static RAM

D.

Dynamic RAM

Correct answer is D

Dynamic RAM memory must be refreshed many times a second because without it being refreshed often, it will lose the data contents it holds

124.

Which of the following is not a type of computer network?

A.

VPN

B.

CAN

C.

WLAN

D.

DAN

Correct answer is D

Dan is not a type of computer network

125.

Which type of network can span several building, but is usually less than 30 square miles big?

A.

CAN

B.

LAN

C.

MAN

D.

WAN

Correct answer is C

CAN usually provides network for places which are less than 30 square miles