WAEC - Computer Studies (2021)

1
Quantitative data can exist in
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(B)
continuous and discrete forms
2
Data created by the user is called
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(A)
primary data
3
The sequence of operation of a computer is
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(A)
accept data, process date and produce output
4
Which of the following descriptions is not true about data?
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(D)
is used for decision making
5
Which of the following statements is true about super computers? They
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(C)
can process billions of operations in a second
6
The Slide Rule is accurate to
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(B)
3-4 decimal places
7
What factors will motivate a field engineer into choosing a notebook computer over a desktop computer?
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(C)
Size, convenience and battery life
8
A collection of wires through which data are transmitted from one part of the computer to another is known as
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(B)
bus
9
The total possible combinations of the input variables for a logic gate containing three input variables is
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(C)
8
10
What is the least number of 750 MB capacity CD-ROM discs needed to transfer 10 GB size file?
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(C)
14
11

The logic gates represented in Figure 1 is called
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(B)
NAND gate
12

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?
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(A)
X
13

Use the logic gate in Fig 2 to answer question 13.

Which of the following statements is true about logic gates X and Y?
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(B)
The output state of each depends on the input state
14

The logical equation for the logic circuit in Figure 3 is
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(D)
Z=\(\overline{A.B}\) + \(\overline{C}\)
15
The operation of a computer and peripherals attached to it is controlled by
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(D)
system software
16
COBOL was developed for
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(A)
business operations
17
The operating system performs the following operations except
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(C)
creation of data
18
The fundamental purpose of the BIOS is
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(A)
initializing and testing hardware components
19
The IF... THEN statement in BASIC is called
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(A)
an assignment statement
20
The use of natural language and symbols to write instructions for the computer is called
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(D)
high level language programming
21
Which of the following stages of the SDLC is post-operational stage?
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(D)
Maintenance
22
The expression 5 + 3*4/2 - 3^2 in QBASIC evaluate to
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(C)
2
23

Use figure 4 to answer question 23

The basic problem with the flow chart is that it has
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(A)
no direction
24

Use Figure 4 to answer question 24

What activity is the flowchart made to represent?
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(C)
Evaluation on how to pick an orange
25

Use Figure 4 to answer question 25

If N in the flowchart is represented by 10, which of the following conditions is not true?
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(B)
If C = 10, stop picking orange
26
A computer system on the network that stores pages, takes request from clients as well as send out information is called a
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(C)
web server
27

The device is Figure 5 uses a transmission method called
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(A)
broadcast
28

In Figure 6 the signals from modem X to modem Y is
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(A)
analogue
29
The "/exams"in the web address; https;//www.waec.org.ng/exams is called
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(B)
path
30
Which of the following statements about URL is true? It is
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(D)
the address of document or 'page' on the world wide web
31

The type of network represented in Figure 7 is called
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(A)
LAN
32
In MS Excel, the cell that contains the pointer or cursor is called
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(A)
active cell
33

The part of the graphic interface in Figure 8 labelled V is called
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(D)
fit to window
34
The figure 2 in the number 1101\(_2\) is indicated in MS Word using a feature called
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(B)
subscript
35

The part of the MS Access interface labelled X in Figure 9 is called
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(B)
Report wizard
36
Which of the following formulas will display the current seconds past the minute os the clock in MS Excel?
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(B)
=MINUTES(NOW())
37

The part of the MS Word interface labelled II in Figure 10 is called
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(B)
Print Layout
38
What type of relationship can you deduce from the statement a department has many employees?
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(B)
One-to-many
39
The screen background where icons and windows are displayed is GUI is called
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(B)
desktop
40
The windows shortcut key for closing an active application is
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(A)
Alt+F4
41
Changing the default settings or appearance of the Taskbar in windows by a user is known as
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(A)
customization
42

The part of the computer system shown in Figure 11 is used to
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(B)
power on or off the computer
43
A single character in an EBCDIC encoding system can be represented using
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(C)
8 bits
44
Evaluate 10011\(_2\) - 1111\(_2\)
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(B)
00100\(_2\)
45
The binary number 0.1101 in decimal is
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(A)
0.8125