Computer Studies past questions: WAEC SSCE 2021

49 objective questions, with answers. Free to read and practise.

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49 questions, one at a time, marked as you go or at the end. No account needed.

1.
A collection of wires through which data are transmitted from one part of the computer to another is known as
1. A.address
2. B.bus
3. C.driver
4. D.register
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Answer: B bus
2.
A computer program that gathers information about a person or organization without their knowledge or consent is known known as
1. A.adware
2. B.time bomb
3. C.trojan horse
4. D.spyware
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Answer: D spyware
3.
A computer system on the network that stores pages, takes request from clients as well as send out information is called a
1. A.client
2. B.web page
3. C.web server
4. D.website
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Answer: C web server
4.
A single character in an EBCDIC encoding system can be represented using
1. A.4 bits
2. B.6 bits
3. C.8 bits
4. D.16 bits
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Answer: C 8 bits
5.
Changing the default settings or appearance of the Taskbar in windows by a user is known as
1. A.customization
2. B.designing
3. C.generalization
4. D.globalization
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Answer: A customization
6.
COBOL was developed for
1. A.business operations
2. B.game developers
3. C.mobile application developers
4. D.search engines optimization
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Answer: A business operations
7.
Data created by the user is called
1. A.primary data
2. B.qualitative data
3. C.quantitative data
4. D.secondary data
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Answer: A primary data
8.
Evaluate 10011 \(_2\) - 1111 \(_2\)
1. A.00010 \(_2\)
2. B.00100 \(_2\)
3. C.01000 \(_2\)
4. D.10000 \(_2\)
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Answer: B 00100 \(_2\)
9.
In Figure 6 the signals from modem X to modem Y is
1. A.analogue
2. B.digital
3. C.imaginary
4. D.aperiodic
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Answer: A analogue
10.
In MS Excel, the cell that contains the pointer or cursor is called
1. A.active cell
2. B.current cell
3. C.default cell
4. D.passive cell
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Answer: A active cell
11.
Quantitative data can exist in
1. A.continuous form only
2. B.continuous and discrete forms
3. C.nominal and ordinal forms
4. D.ordinal form only
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Answer: B continuous and discrete forms
12.
The "/exams"in the web address; https;//www.waec.org.ng/exams is called
1. A.domain name
2. B.path
3. C.port
4. D.subdomain
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Answer: B path
13.
The binary number 0.1101 in decimal is
1. A.0.8125
2. B.0.8215
3. C.0.8225
4. D.0.8512
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Answer: A 0.8125
14.
The device is Figure 5 uses a transmission method called
1. A.broadcast
2. B.podcast
3. C.multicast
4. D.unicast
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Answer: A broadcast
15.
The expression \(5 + 3*4/2 - 3^2\) in QBASIC evaluate to
1. A.7
2. B.4
3. C.2
4. D.1
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Answer: C 2
16.
The figure 2 in the number 1101 \(_2\) is indicated in MS Word using a feature called
1. A.superscript
2. B.subscript
3. C.root
4. D.exponentiation
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Answer: B subscript
17.
The file access method shown in Figure 12 is called
1. A.hashed access
2. B.indexed access
3. C.random access
4. D.sequential access
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Answer: B indexed access
18.
The following actions are the effects of virus infection in a system except
1. A.deletion of files
2. B.slow operation
3. C.hard disk failure
4. D.display of unwanted messages
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Answer: C hard disk failure
19.
The fundamental purpose of the BIOS is
1. A.initializing and testing hardware components
2. B.testing the system performance
3. C.updating the system performance
4. D.saving the operating system's file
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Answer: A initializing and testing hardware components
20.
The IF... THEN statement in BASIC is called
1. A.an assignment statement
2. B.an object
3. C.a class
4. D.a control structure
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Answer: A an assignment statement
21.
The logic gates represented in Figure 1 is called
1. A.AND gate
2. B.NAND gate
3. C.NOR gate
4. D.OR gate
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Answer: B NAND gate
22.
The logical equation for the logic circuit in Figure 3 is
1. A.\(\overline{A+B}\) \(\overline{C}\)
2. B.Z=A.B+C
3. C.Z=A+B.C
4. D.Z= \(\overline{A.B}\) + \(\overline{C}\)
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Answer: D Z= \(\overline{A.B}\) + \(\overline{C}\)
23.
The operating system performs the following operations except
1. A.organization of data
2. B.resource allocation
3. C.creation of data
4. D.arrangement of files
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Answer: C creation of data
24.
The operation of a computer and peripherals attached to it is controlled by
1. A.application
2. B.hardware
3. C.live ware
4. D.system software
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Answer: D system software
25.
The part of the computer system shown in Figure 11 is used to
1. A.perform memory test
2. B.power on or off the computer
3. C.print a document from the computer
4. D.reset the computer to factory setting
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Answer: B power on or off the computer
26.
The part of the graphic interface in Figure 8 labelled V is called
1. A.pan
2. B.zoom in
3. C.zoom out
4. D.fit to window
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Answer: D fit to window
27.
The part of the MS Access interface labelled X in Figure 9 is called
1. A.Report view
2. B.Report wizard
3. C.Query design
4. D.Query view
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Answer: B Report wizard
28.
The part of the MS Word interface labelled II in Figure 10 is called
1. A.Read mode
2. B.Print Layout
3. C.Proofing error
4. D.Web layout
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Answer: B Print Layout
29.
The screen background where icons and windows are displayed is GUI is called
1. A.explorer
2. B.desktop
3. C.opening screen
4. D.homepage
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Answer: B desktop
30.
The sequence of operation of a computer is
1. A.accept data, process date and produce output
2. B.accept data, produce data and produce information
3. C.produce data, supply data and produce output
4. D.process data, produce data and display information
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Answer: A accept data, process date and produce output
31.
The Slide Rule is accurate to
1. A.1-2 decimal places
2. B.3-4 decimal places
3. C.5 decimal places
4. D.6 decimal places
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Answer: B 3-4 decimal places
32.
The total possible combinations of the input variables for a logic gate containing three input variables is
1. A.3
2. B.4
3. C.8
4. D.12
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Answer: C 8
33.
The type of network represented in Figure 7 is called
1. A.LAN
2. B.MAN
3. C.PAN
4. D.WAN
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Answer: A LAN
34.
The use of natural language and symbols to write instructions for the computer is called
1. A.machine language programming
2. B.assembly language programming
3. C.algorithm language programming
4. D.high level language programming
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Answer: D high level language programming
35.
The windows shortcut key for closing an active application is
1. A.Alt+F4
2. B.Ctrl+Alt+Del
3. C.Ctrl+Esc
4. D.Ctrl+Shift+Del
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Answer: A Alt+F4
36.
To prevent unforeseen data loss, a user must
1. A.edit the data
2. B.create the data
3. C.backup the data
4. D.defragment the data
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Answer: C backup the data
37.
Use figure 4 to answer question 23 The basic problem with the flow chart is that it has
1. A.no direction
2. B.no algorithm
3. C.END is a process
4. D.improper branch out
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Answer: A no direction
38.
Use Figure 4 to answer question 24 What activity is the flowchart made to represent?
1. A.How to pick an orange
2. B.Instruction to pick an orange
3. C.Evaluation on how to pick an orange
4. D.Number of times to pick an orange
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Answer: C Evaluation on how to pick an orange
39.
Use Figure 4 to answer question 25 If N in the flowchart is represented by 10, which of the following conditions is not true?
1. A.If C > 10, do not pick orange
2. B.If C = 10, stop picking orange
3. C.If C < 10, keep picking orange
4. D.If C = 10, continue picking orange
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Answer: B If C = 10, stop picking orange
40.
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?
1. A.X
2. B.Y
3. C.Z
4. D.X and Y
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Answer: A X
41.
Use the logic gate in Fig 2 to answer question 13. Which of the following statements is true about logic gates X and Y?
1. A.They both have multiple output variables
2. B.The output state of each depends on the input state
3. C.The output is true only if all inputs are true
4. D.They are both equivalent gates
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Answer: B The output state of each depends on the input state
42.
What factors will motivate a field engineer into choosing a notebook computer over a desktop computer?
1. A.Cost, convenience and battery life
2. B.Cost, size and convenience
3. C.Size, convenience and battery life
4. D.Size, cost and battery life
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Answer: C Size, convenience and battery life
43.
What is the least number of 750 MB capacity CD-ROM discs needed to transfer 10 GB size file?
1. A.75
2. B.31
3. C.14
4. D.13
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Answer: B 31
44.
What type of relationship can you deduce from the statement a department has many employees?
1. A.One-to-one
2. B.One-to-many
3. C.Many-to-many
4. D.Many-to-one
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Answer: B One-to-many
45.
Which of the following formulas will display the current seconds past the minute os the clock in MS Excel?
1. A.=MINUTES()
2. B.=MINUTES(NOW())
3. C.=MINUTE(YEAR())
4. D.=MINUTES(HOUR(NOW()))
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Answer: B =MINUTES(NOW())
46.
Which of the following options is not a similarity between computer file and manual file? Both can
1. A.be accessed
2. B.be retrieved
3. C.store multimedia
4. D.contain information
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Answer: C store multimedia
47.
Which of the following stages of the SDLC is post-operational stage?
1. A.Analysis
2. B.Design
3. C.Investigation
4. D.Maintenance
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Answer: D Maintenance
48.
Which of the following statements about URL is true? It is
1. A.a computer software program
2. B.a type of web server
3. C.an acronym for unlimited resources for learning
4. D.the address of document or 'page' on the world wide web
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Answer: D the address of document or 'page' on the world wide web
49.
Which of the following statements is true about super computers? They
1. A.can fit on a single small chip
2. B.are easily affordable
3. C.can process billions of operations in a second
4. D.are found across various homes and offices
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Answer: C can process billions of operations in a second

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