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WAEC - Computer Studies (2020)

1

Which of the following is not a step involved in data conversion?

 

Answer
(D)
Transfer
2
The communication of knowledge, concepts and ideas is referred to as? 
Answer
(B)
information transmission. 
3
The equivalent of the decimal number 89 in base 4 is? 
Answer
(D)
1121.
4
Choose the incorrect statement about microcomputers? 
Answer
(D)
Most micros use rigid disk storage devices rather than floppy disk drives.
5
Under classification by data representation. computers can be? 
Answer
(A)
analogue, digital and hybrid. 
6
Pascal's calculating machine was useful in? 
Answer
(A)
addition and subtraction only. 
7

Arrange the following inventions in chronological order.

I. Slide Rule ll. Pascaline llI. Analytical Engine IV. Difference Engine

 

Answer
(D)
I, II, III and IV
8
Handwritten letters, typeset documents or printout Characters can be read into the computer by? 
Answer
(D)
Optical Mark Reader.
9

which of the following logic operations would select a record when at least one condition is satisfied? 

 

Answer
(D)
OR
10

In Figure 1, the value of Z when X = 1 and Y=0 is? 

 

 

Answer
(B)
1. 
11

In Figure 1, the value of Z when X = 1 and Y=0 is? 

 

 

 

 

Answer
(B)
1. 
12

A data bus that is capable of transferring 8 bytes of data at once can be rated as? 

 

Answer
(C)
a 64-bit data bus. 
13

Which of the following memory types are nonvolatile?

I. PROM II. SRAM II. EEPROM IV. DRAM

 

Answer
(A)
 I and lll only 
14

A company known as CIBITO has the following memory modules in four of its computers as shown in Table 1.

Which memory module will be appropriate for graphic design?

 

Table 1

Memory Module

 Memory Type

Number of Pins
P SIMM 30
Q SIMM 72
R SO DIMM 72
S DIMM 168

 

Answer
(D)
 S
15
One attribute of the Read Only Memory is that it? 
Answer
(C)
 stores the BIOS. 
16

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

 

Answer
(D)
 system software 
17
Antivirus software is an example of? 
Answer
(D)
utility software.
18
Which of the following devices will not require the use of system software to operate? 
Answer
(A)
Analogue camera 
19
Which of the following application packages is most suitable for database management? 
Answer
(D)
Fox Pro
20
Files that contain machine language instructions are called? 
Answer
(B)
executable files 
21
The following are types of errors in programming except? 
Answer
(D)
arithmetic error.
22
The stages of software development do not include? 
Answer
(B)
 conversion. 
23

 

Express P(1 + \(\frac{R}{100}\))\(^N\) as a BASIC programming notation.

 

Answer
(D)
P *(1 + R /100) ^N
24
An algorithm can be described as? 
Answer
(D)
a sequence of instructions for solving a problem.
25
The major difference between low level programming language and high level programming language Is that? 
Answer
(D)
low level languages do not need translators while high level languages do.
26
What will the following BASIC statement produce? PRINT "Afrikom Computer School" A . 
Answer
(C)
Afrikon Computer School displayed on the screen. 
27
A rectangular image consisting of black lines and white spaces representing data which can be optically read is called? 
Answer
(A)
 barcode. 
28
A rectangular image consisting of black lines and white spaces representing data which can be optically read is called? 
Answer
(A)
 barcode. 
29
The following are types of data network except? 
Answer
(A)
MAC. 
30
The minimum number of computers that can constitute a network is? 
Answer
(D)
two.
31
If a computer user wants to access the national database from a remote location, the user will require a? 
Answer
(C)
communication software, telephone line and decoder. 
32

Which type of network topology is represented in Figure 2 above?

Answer
(A)
Hybrid topology
33
In networking, bandwidth means?
Answer
(C)
transmission capacity of a communication channel.
34
A pre-designed document coordinating fonts, a layout and a background is also known as? 
Answer
(D)
template
35
The following are functions of database management system except? 
Answer
(C)
rule enforcement. 
36
To make the entire slides in a presentation to have the same "look" in MS PowerPoint, a user  should? 
Answer
(C)
use a presentation design template. 
37
In MS Excel, the average of 10 numbers give B1, B2,...,B10 is? 
Answer
(D)
= B1 +B2 +... + B10/10.
38
To centre worksheet titles across a range of cells MS Excel, the user must? 
Answer
(C)
 select the cells containing the title text and use the fill handle to centre the text across the range of cells. 
39
In graphics, a subscript text refers to a text that is positioned? 
Answer
(B)
 a little bit below a normal line of text. 
40
In database application, the field length determines the? 
Answer
(A)
maximum number of characters the field can accommodate. 
41
Removing a program on a computer properly requires? 
Answer
(D)
uninstalling.
42
A feature on the computer desktop that indicates the current active applications is called? 
Answer
(D)
task bar.
43
In a Windows operation involving dragging and dropping an item on the desktop, the item will be? 
Answer
(C)
moved to a new location. 
44

Digital signals can be represented by: 

I. Binary Codes

Il.0 and 1

III. High and Low Which of the following options is correct?

 

Answer
(D)
 I, Il and III
45
A single hexadecimal digit is represented by? 
Answer
(C)
four bits 
46
The decimal fraction 0.9375 converts to binary? 
Answer
(C)
 0.1111. 
47
The EBCDIC coding system was developed on? 
Answer
(A)
 IBM mainframe computers. 
48
Which of the following is not a criterion files? 
Answer
(C)
Storage medium 
49

Which of the following options best shows the arrangement of file structure? 

I File

ll. Field

III. Character

IV, Record

 

Answer
(A)
III, II, I and IV 
50

 

Which of the following statements best describes sequential file organization? 

Answer
(C)
Records are sorted according to a key field.