2021 WAEC (WASSCE) Computer Studies Past Questions & Answers

Question 1

Which of the following descriptions is not true about data?

Accepted Answer

D. is used for decision making

Answer

A. It can be converted to information

Answer

B. is a collection of raw facts and figures

Answer

C. is unorganized

Question 2

The binary number 0.1101 in decimal is

Accepted Answer

A. 0.8125

Answer

B. 0.8215

Answer

C. 0.8225

Answer

D. 0.8512

Question 3

A computer program that gathers information about a person or organization without their knowledge or consent  is known known as

Accepted Answer

D. spyware

Answer

A. adware

Answer

B. time bomb

Answer

C. trojan horse

Question 4

Which of the following statements about URL is true? It is

Accepted Answer

D. the address of document or 'page' on the world wide web

Answer

A. a computer software program

Answer

B. a type of web server

Answer

C. an acronym for unlimited resources for learning

Question 5

Quantitative data can exist in

Accepted Answer

B. continuous and discrete forms

Answer

A. continuous form only

Answer

C. nominal and ordinal forms

Answer

D. ordinal form only

Question 6

Which of the following formulas will display the current seconds past the minute os the clock in MS Excel?

Accepted Answer

D. =MINUTES(HOUR(NOW()))

Answer

A. =MINUTES()

Answer

B. =MINUTES(NOW())

Answer

C. =MINUTE(YEAR())

Question 7

What is the least number of 750 MB capacity CD-ROM discs needed to transfer 10 GB size file?

Accepted Answer

C. 14

Answer

A. 75

Answer

B. 31

Answer

D. 13

Question 8

What factors will motivate a field engineer into choosing a notebook computer over a desktop computer?

Accepted Answer

C. Size, convenience and battery life

Answer

A. Cost, convenience and battery life

Answer

B. Cost, size and convenience

Answer

D. Size, cost and battery life

Question 9

Use the logic gate in Fig 2 to answer question 13. Which of the following statements is true about logic gates X and Y?

Accepted Answer

B. The output state of each depends on the input state

Answer

A. They both have multiple output variables

Answer

C. The output is true only if all inputs are true

Answer

D. They are both equivalent gates.

Question 10

Changing the default settings or appearance of the Taskbar in windows by a user is known as

Accepted Answer

A. customization

Answer

B. designing

Answer

C. generalization

Answer

D. globalization

Question 11

The total possible combinations of the input variables for a logic gate containing three input variables is

Accepted Answer

C. 8

Answer

A. 3

Answer

B. 4

Answer

D. 12

Question 12

The operation of a computer and peripherals attached to it is controlled by

Accepted Answer

D. system software

Answer

A. application

Answer

B. hardware

Answer

C. live ware

Question 13

What type of relationship can you deduce from the statement a department has many employees?

Accepted Answer

B. One-to-many

Answer

A. One-to-one

Answer

C. Many-to-many

Answer

D. Many-to-one

Question 14

The following actions are the effects of virus infection in a system except

Accepted Answer

C. hard disk failure

Answer

A. deletion of files

Answer

B. slow operation

Answer

D. display of unwanted messages

Question 15

The operating system performs the following operations except

Accepted Answer

C. creation of data

Answer

A. organization of data

Answer

B. resource allocation

Answer

D. arrangement of files

Question 16

The screen background where icons and windows are displayed is GUI is called

Accepted Answer

B. desktop

Answer

A. explorer

Answer

C. opening screen

Answer

D. homepage

Question 17

The sequence of operation of a computer is

Accepted Answer

A. accept data, process date and produce output

Answer

B. accept data, produce data and produce information

Answer

C. produce data, supply data and produce output

Answer

D. process data, produce data and display information

Question 18

The part of the MS Word interface labelled II in Figure 10 is called

Accepted Answer

A. Read mode

Answer

B. Print Layout

Answer

C. Proofing error

Answer

D. Web layout

Question 19

The type of network represented in Figure 7 is called

Accepted Answer

B. MAN

Answer

A. LAN

Answer

C. PAN

Answer

D. WAN

Question 20

The logical equation for the logic circuit in Figure 3 is

Accepted Answer

C. Z=A+B.C

Answer

A. $\overline{A+B}$ $\overline{C}$

Answer

B. Z=A.B+C

Answer

D. Z=$\overline{A.B}$ + $\overline{C}$

Question 21

Data created by the user is called

Accepted Answer

A. primary data

Answer

B. qualitative data

Answer

C. quantitative data

Answer

D. secondary data

Question 22

The device is Figure 5 uses a transmission method called

Accepted Answer

D. unicast

Answer

A. broadcast

Answer

B. podcast

Answer

C. multicast

Question 23

The windows shortcut key for closing an active application is

Accepted Answer

A. Alt+F4

Answer

B. Ctrl+Alt+Del

Answer

C. Ctrl+Esc.

Answer

D. Ctrl+Shift+Del

Question 24

Use the logic gate in Fig 2 to answer question 12. Which of the logic gates will give an output opposite to the input state?

Accepted Answer

A. X

Answer

B. Y

Answer

C. Z

Answer

D. X and Y

Question 25

In Figure 6 the signals from modem X to modem Y is

Accepted Answer

A. analogue

Answer

B. digital

Answer

C. imaginary

Answer

D. aperiodic

Question 26

The "/exams"in the web address; https;//www.waec.org.ng/exams is called

Accepted Answer

B. path

Answer

A. domain name

Answer

C. port

Answer

D. subdomain

Question 27

The use of natural language and symbols to write instructions for the computer is called

Accepted Answer

D. high level language programming

Answer

A. machine language programming

Answer

B. assembly language programming

Answer

C. algorithm language programming

Question 28

Use figure 4 to answer question 23 The basic problem with the flow chart is that it has

Accepted Answer

A. no direction

Answer

B. no algorithm

Answer

C. END is a process

Answer

D. improper branch out

Question 29

The figure 2 in the number 1101$_2$ is indicated in MS Word using a feature called

Accepted Answer

B. subscript

Answer

A. superscript

Answer

C. root

Answer

D. exponentiation

Question 30

The part of the graphic interface in Figure 8 labelled V is called

Accepted Answer

D. fit to window

Answer

A. pan

Answer

B. zoom in

Answer

C. zoom out

Question 31

Which of the following stages of the SDLC is post-operational stage?

Accepted Answer

D. Maintenance

Answer

A. Analysis

Answer

B. Design

Answer

C. Investigation

Question 32

The expression 5 + 3*4/2 - 3^2 in QBASIC evaluate to

Accepted Answer

C. 2

Answer

A. 7

Answer

B. 4

Answer

D. 1

Question 33

Which of the following statements is true about super computers? They

Accepted Answer

C. can process billions of operations in a second

Answer

A. can fit on a single small chip

Answer

B. are easily affordable

Answer

D. are found across various homes and offices

Question 34

Evaluate 10011$_2$ - 1111$_2$

Accepted Answer

B. 00100$_2$

Answer

A. 00010$_2$

Answer

C. 01000$_2$

Answer

D. 10000$_2$

Question 35

A collection of wires through which data are transmitted from one part of the computer to another is known as

Accepted Answer

B. bus

Answer

A. address

Answer

C. driver

Answer

D. register

Question 36

COBOL was developed for

Accepted Answer

A. business operations

Answer

B. game developers

Answer

C. mobile application developers

Answer

D. search engines optimization

Question 37

A single character in an EBCDIC encoding system can be represented using

Accepted Answer

C. 8 bits

Answer

A. 4 bits

Answer

B. 6 bits

Answer

D. 16 bits

Question 38

Which of the following options is not a similarity between computer file and manual file? Both can

Accepted Answer

C. store multimedia

Answer

A. be accessed

Answer

B. be retrieved

Answer

D. contain information

Question 39

The fundamental purpose of the BIOS is

Accepted Answer

A. initializing and testing hardware components

Answer

B. testing the system performance

Answer

C. updating the system performance

Answer

D. saving the operating system's file

Question 40

Use Figure 4 to answer question 25 If N in the flowchart is represented by 10, which of the following conditions is not true?

Accepted Answer

A. If C > 10, do not pick orange.

Answer

B. If C = 10, stop picking orange

Answer

C. If C < 10, keep picking orange

Answer

D. If C = 10, continue picking orange

Question 41

The logic gates represented in Figure 1 is called

Accepted Answer

C. NOR gate

Answer

A. AND gate

Answer

B. NAND gate

Answer

D. OR gate

Question 42

The part of the MS Access interface labelled X in Figure 9 is called

Accepted Answer

C. Query design

Answer

A. Report view

Answer

B. Report wizard

Answer

D. Query view

Question 43

The Slide Rule is accurate to

Accepted Answer

B. 3-4 decimal places

Answer

A. 1-2 decimal places

Answer

C. 5 decimal places

Answer

D. 6 decimal places

Question 44

Use Figure 4 to answer question 24 What activity is the flowchart made to represent?

Accepted Answer

C. Evaluation on how to pick an orange

Answer

A. How to pick an orange

Answer

B. Instruction to pick an orange

Answer

D. Number of times to pick an orange

Question 45

The IF... THEN statement in BASIC is called

Accepted Answer

D. a control structure

Answer

A. an assignment statement

Answer

B. an object

Answer

C. a class

Question 46

To prevent unforeseen data loss, a user must

Accepted Answer

C. backup the data

Answer

A. edit the data

Answer

B. create the data

Answer

D. defragment the data

Question 47

In MS Excel, the cell that contains the pointer or cursor is called

Accepted Answer

A. active cell

Answer

B. current cell

Answer

C. default cell

Answer

D. passive cell

Question 48

A computer system on the network that stores pages, takes request from clients as well as send out information is called a

Accepted Answer

C. web server

Answer

A. client

Answer

B. web page

Answer

D. website

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