WAEC - Computer Studies (2020)

• 1

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

   

  Одговорити

  (D)

  Transfer
• 2

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

  Одговорити

  (B)

  information transmission. 
• 3

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

  Одговорити

  (D)

  1121.
• 4

  Choose the incorrect statement about microcomputers? 

  Одговорити

  (D)

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

  Under classification by data representation. computers can be? 

  Одговорити

  (A)

  analogue, digital and hybrid. 
• 6

  Pascal's calculating machine was useful in? 

  Одговорити

  (A)

  addition and subtraction only. 
• 7

  Arrange the following inventions in chronological order.

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

   

  Одговорити

  (D)

  I, II, III and IV
• 8

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

  Одговорити

  (D)

  Optical Mark Reader.
• 9

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

   

  Одговорити

  (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

   

  Одговорити

  (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

   

  Одговорити

  (D)

   S
• 15

  One attribute of the Read Only Memory is that it? 

  Одговорити

  (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? 

  Одговорити

  (D)

  utility software.
• 18

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

  Одговорити

  (A)

  Analogue camera 
• 19

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

  Одговорити

  (D)

  Fox Pro
• 20

  Files that contain machine language instructions are called? 

  Одговорити

  (B)

  executable files 
• 21

  The following are types of errors in programming except? 

  Одговорити

  (D)

  arithmetic error.
• 22

  The stages of software development do not include? 

  Одговорити

  (B)

   conversion. 
• 23

   

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

   

  Одговорити

  (D)

  P *(1 + R /100) ^N
• 24

  An algorithm can be described as? 

  Одговорити

  (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? 

  Одговорити

  (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 . 

  Одговорити

  (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? 

  Одговорити

  (A)

   barcode. 
• 28

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

  Одговорити

  (A)

   barcode. 
• 29

  The following are types of data network except? 

  Одговорити

  (A)

  MAC. 
• 30

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

  Одговорити

  (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?

  Одговорити

  (A)

  Hybrid topology
• 33

  In networking, bandwidth means?

  Одговорити

  (C)

  transmission capacity of a communication channel.
• 34

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

  Одговорити

  (D)

  template
• 35

  The following are functions of database management system except? 

  Одговорити

  (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? 

  Одговорити

  (D)

  = B1 +B2 +... + B10/10.
• 38

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

  Одговорити

  (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? 

  Одговорити

  (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? 

  Одговорити

  (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? 

  Одговорити

  (C)

  four bits 
• 46

  The decimal fraction 0.9375 converts to binary? 

  Одговорити

  (C)

   0.1111. 
• 47

  The EBCDIC coding system was developed on? 

  Одговорити

  (A)

   IBM mainframe computers. 
• 48

  Which of the following is not a criterion files? 

  Одговорити

  (C)

  Storage medium 
• 49

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

  I File

  ll. Field

  III. Character

  IV, Record

   

  Одговорити

  (A)

  III, II, I and IV 
• 50

   

  Which of the following statements best describes sequential file organization? 

  Одговорити

  (C)

  Records are sorted according to a key field.