WAEC - Computer Studies (2020)

• 1

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

   

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  (D)

  Transfer
• 2

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

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  (B)

  information transmission. 
• 3

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

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  (D)

  1121.
• 4

  Choose the incorrect statement about microcomputers? 

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  (D)

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

  Under classification by data representation. computers can be? 

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  (A)

  analogue, digital and hybrid. 
• 6

  Pascal's calculating machine was useful in? 

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  (A)

  addition and subtraction only. 
• 7

  Arrange the following inventions in chronological order.

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

   

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  (D)

  I, II, III and IV
• 8

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

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  (D)

  Optical Mark Reader.
• 9

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

   

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  (D)

  OR
• 10

  

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

   

   

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  (B)

  1. 
• 11

  

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

   

   

   

   

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  (B)

  1. 
• 12

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

   

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  (C)

  a 64-bit data bus. 
• 13

  Which of the following memory types are nonvolatile?

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

   

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  (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

   

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  (D)

   S
• 15

  One attribute of the Read Only Memory is that it? 

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  (C)

   stores the BIOS. 
• 16

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

   

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  (D)

   system software 
• 17

  Antivirus software is an example of? 

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  (D)

  utility software.
• 18

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

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  (A)

  Analogue camera 
• 19

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

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  (D)

  Fox Pro
• 20

  Files that contain machine language instructions are called? 

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  (B)

  executable files 
• 21

  The following are types of errors in programming except? 

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  (D)

  arithmetic error.
• 22

  The stages of software development do not include? 

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  (B)

   conversion. 
• 23

   

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

   

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  (D)

  P *(1 + R /100) ^N
• 24

  An algorithm can be described as? 

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  (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? 

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  (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 . 

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  (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? 

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  (A)

   barcode. 
• 28

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

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  (A)

   barcode. 
• 29

  The following are types of data network except? 

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  (A)

  MAC. 
• 30

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

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  (D)

  two.
• 31

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

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  (C)

  communication software, telephone line and decoder. 
• 32

  

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

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  (A)

  Hybrid topology
• 33

  In networking, bandwidth means?

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  (C)

  transmission capacity of a communication channel.
• 34

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

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  (D)

  template
• 35

  The following are functions of database management system except? 

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  (C)

  rule enforcement. 
• 36

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

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  (C)

  use a presentation design template. 
• 37

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

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  (D)

  = B1 +B2 +... + B10/10.
• 38

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

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  (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? 

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  (B)

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

  In database application, the field length determines the? 

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  (A)

  maximum number of characters the field can accommodate. 
• 41

  Removing a program on a computer properly requires? 

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  (D)

  uninstalling.
• 42

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

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  (D)

  task bar.
• 43

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

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  (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?

   

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  (D)

   I, Il and III
• 45

  A single hexadecimal digit is represented by? 

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  (C)

  four bits 
• 46

  The decimal fraction 0.9375 converts to binary? 

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  (C)

   0.1111. 
• 47

  The EBCDIC coding system was developed on? 

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  (A)

   IBM mainframe computers. 
• 48

  Which of the following is not a criterion files? 

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  (C)

  Storage medium 
• 49

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

  I File

  ll. Field

  III. Character

  IV, Record

   

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  (A)

  III, II, I and IV 
• 50

   

  Which of the following statements best describes sequential file organization? 

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  (C)

  Records are sorted according to a key field.