WAEC - Computer Studies (2020)

• 1

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

   

  Răspuns

  (D)

  Transfer
• 2

  The communication of knowledge, concepts and ideas is referred to as? 

  Răspuns

  (B)

  information transmission. 
• 3

  The equivalent of the decimal number 89 in base 4 is? 

  Răspuns

  (D)

  1121.
• 4

  Choose the incorrect statement about microcomputers? 

  Răspuns

  (D)

  Most micros use rigid disk storage devices rather than floppy disk drives.
• 5

  Under classification by data representation. computers can be? 

  Răspuns

  (A)

  analogue, digital and hybrid. 
• 6

  Pascal's calculating machine was useful in? 

  Răspuns

  (A)

  addition and subtraction only. 
• 7

  Arrange the following inventions in chronological order.

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

   

  Răspuns

  (D)

  I, II, III and IV
• 8

  Handwritten letters, typeset documents or printout Characters can be read into the computer by? 

  Răspuns

  (D)

  Optical Mark Reader.
• 9

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

   

  Răspuns

  (D)

  OR
• 10

  

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

   

   

  Răspuns

  (B)

  1. 
• 11

  

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

   

   

   

   

  Răspuns

  (B)

  1. 
• 12

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

   

  Răspuns

  (C)

  a 64-bit data bus. 
• 13

  Which of the following memory types are nonvolatile?

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

   

  Răspuns

  (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

   

  Răspuns

  (D)

   S
• 15

  One attribute of the Read Only Memory is that it? 

  Răspuns

  (C)

   stores the BIOS. 
• 16

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

   

  Răspuns

  (D)

   system software 
• 17

  Antivirus software is an example of? 

  Răspuns

  (D)

  utility software.
• 18

  Which of the following devices will not require the use of system software to operate? 

  Răspuns

  (A)

  Analogue camera 
• 19

  Which of the following application packages is most suitable for database management? 

  Răspuns

  (D)

  Fox Pro
• 20

  Files that contain machine language instructions are called? 

  Răspuns

  (B)

  executable files 
• 21

  The following are types of errors in programming except? 

  Răspuns

  (D)

  arithmetic error.
• 22

  The stages of software development do not include? 

  Răspuns

  (B)

   conversion. 
• 23

   

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

   

  Răspuns

  (D)

  P *(1 + R /100) ^N
• 24

  An algorithm can be described as? 

  Răspuns

  (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? 

  Răspuns

  (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 . 

  Răspuns

  (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? 

  Răspuns

  (A)

   barcode. 
• 28

  A rectangular image consisting of black lines and white spaces representing data which can be optically read is called? 

  Răspuns

  (A)

   barcode. 
• 29

  The following are types of data network except? 

  Răspuns

  (A)

  MAC. 
• 30

  The minimum number of computers that can constitute a network is? 

  Răspuns

  (D)

  two.
• 31

  If a computer user wants to access the national database from a remote location, the user will require a? 

  Răspuns

  (C)

  communication software, telephone line and decoder. 
• 32

  

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

  Răspuns

  (A)

  Hybrid topology
• 33

  In networking, bandwidth means?

  Răspuns

  (C)

  transmission capacity of a communication channel.
• 34

  A pre-designed document coordinating fonts, a layout and a background is also known as? 

  Răspuns

  (D)

  template
• 35

  The following are functions of database management system except? 

  Răspuns

  (C)

  rule enforcement. 
• 36

  To make the entire slides in a presentation to have the same "look" in MS PowerPoint, a user  should? 

  Răspuns

  (C)

  use a presentation design template. 
• 37

  In MS Excel, the average of 10 numbers give B1, B2,...,B10 is? 

  Răspuns

  (D)

  = B1 +B2 +... + B10/10.
• 38

  To centre worksheet titles across a range of cells MS Excel, the user must? 

  Răspuns

  (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? 

  Răspuns

  (B)

   a little bit below a normal line of text. 
• 40

  In database application, the field length determines the? 

  Răspuns

  (A)

  maximum number of characters the field can accommodate. 
• 41

  Removing a program on a computer properly requires? 

  Răspuns

  (D)

  uninstalling.
• 42

  A feature on the computer desktop that indicates the current active applications is called? 

  Răspuns

  (D)

  task bar.
• 43

  In a Windows operation involving dragging and dropping an item on the desktop, the item will be? 

  Răspuns

  (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?

   

  Răspuns

  (D)

   I, Il and III
• 45

  A single hexadecimal digit is represented by? 

  Răspuns

  (C)

  four bits 
• 46

  The decimal fraction 0.9375 converts to binary? 

  Răspuns

  (C)

   0.1111. 
• 47

  The EBCDIC coding system was developed on? 

  Răspuns

  (A)

   IBM mainframe computers. 
• 48

  Which of the following is not a criterion files? 

  Răspuns

  (C)

  Storage medium 
• 49

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

  I File

  ll. Field

  III. Character

  IV, Record

   

  Răspuns

  (A)

  III, II, I and IV 
• 50

   

  Which of the following statements best describes sequential file organization? 

  Răspuns

  (C)

  Records are sorted according to a key field.