WAEC - Computer Studies (2021)

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

The logic gates represented in Figure 1 is called
Svar
(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?
Svar
(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?
Svar
(B)
The output state of each depends on the input state
14

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

Use figure 4 to answer question 23

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

Use Figure 4 to answer question 24

What activity is the flowchart made to represent?
Svar
(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?
Svar
(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
Svar
(C)
web server
27

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

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

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

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

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

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

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