WAEC Data Processing Past Questions & Answers - Page 53

261.

In relational model, a tuple is a

A.

A column of table

B.

Key of a table

C.

Row of a table

D.

Two-dimensional table

Correct answer is C

No explanation has been provided for this answer.

262.

In word processing applications, the symbol B, I and U are commonly used buttons found on the 

A.

Standard toolbar

B.

Menu bar

C.

Formatting bar

D.

Drawing toolbar

Correct answer is C

No explanation has been provided for this answer.

263.

The following software programs coordinates and control all other computer progra, programs, hardware and users' action except

A.

ZENITH

B.

UNIX

C.

DOS

D.

DBSM

Correct answer is D

No explanation has been provided for this answer.

264.

A program designed to detect and prevent malicious programs from a computer system is

A.

Spyware

B.

Passcode

C.

Malware

D.

Firewall

Correct answer is D

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network.

265.

An internet-based system that allows people different geographical locations to have in-personmeeting is known as 

A.

Voice messaging

B.

Voice conferencing system

C.

On-line mailing

D.

Fax system

Correct answer is B

No explanation has been provided for this answer.