WAEC - Computer Studies (2020)

• 1

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

   

  Відповідь

  (D)

  Transfer
• 2

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

  Відповідь

  (B)

  information transmission. 
• 3

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

  Відповідь

  (D)

  1121.
• 4

  Choose the incorrect statement about microcomputers? 

  Відповідь

  (D)

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

  Under classification by data representation. computers can be? 

  Відповідь

  (A)

  analogue, digital and hybrid. 
• 6

  Pascal's calculating machine was useful in? 

  Відповідь

  (A)

  addition and subtraction only. 
• 7

  Arrange the following inventions in chronological order.

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

   

  Відповідь

  (D)

  I, II, III and IV
• 8

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

  Відповідь

  (D)

  Optical Mark Reader.
• 9

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

   

  Відповідь

  (D)

  OR
• 10

  

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

   

   

  Відповідь

  (B)

  1. 
• 11

  

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

   

   

   

   

  Відповідь

  (B)

  1. 
• 12

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

   

  Відповідь

  (C)

  a 64-bit data bus. 
• 13

  Which of the following memory types are nonvolatile?

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

   

  Відповідь

  (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

   

  Відповідь

  (D)

   S
• 15

  One attribute of the Read Only Memory is that it? 

  Відповідь

  (C)

   stores the BIOS. 
• 16

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

   

  Відповідь

  (D)

   system software 
• 17

  Antivirus software is an example of? 

  Відповідь

  (D)

  utility software.
• 18

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

  Відповідь

  (A)

  Analogue camera 
• 19

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

  Відповідь

  (D)

  Fox Pro
• 20

  Files that contain machine language instructions are called? 

  Відповідь

  (B)

  executable files 
• 21

  The following are types of errors in programming except? 

  Відповідь

  (D)

  arithmetic error.
• 22

  The stages of software development do not include? 

  Відповідь

  (B)

   conversion. 
• 23

   

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

   

  Відповідь

  (D)

  P *(1 + R /100) ^N
• 24

  An algorithm can be described as? 

  Відповідь

  (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? 

  Відповідь

  (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 . 

  Відповідь

  (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? 

  Відповідь

  (A)

   barcode. 
• 28

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

  Відповідь

  (A)

   barcode. 
• 29

  The following are types of data network except? 

  Відповідь

  (A)

  MAC. 
• 30

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

  Відповідь

  (D)

  two.
• 31

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

  Відповідь

  (C)

  communication software, telephone line and decoder. 
• 32

  

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

  Відповідь

  (A)

  Hybrid topology
• 33

  In networking, bandwidth means?

  Відповідь

  (C)

  transmission capacity of a communication channel.
• 34

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

  Відповідь

  (D)

  template
• 35

  The following are functions of database management system except? 

  Відповідь

  (C)

  rule enforcement. 
• 36

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

  Відповідь

  (C)

  use a presentation design template. 
• 37

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

  Відповідь

  (D)

  = B1 +B2 +... + B10/10.
• 38

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

  Відповідь

  (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? 

  Відповідь

  (B)

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

  In database application, the field length determines the? 

  Відповідь

  (A)

  maximum number of characters the field can accommodate. 
• 41

  Removing a program on a computer properly requires? 

  Відповідь

  (D)

  uninstalling.
• 42

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

  Відповідь

  (D)

  task bar.
• 43

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

  Відповідь

  (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?

   

  Відповідь

  (D)

   I, Il and III
• 45

  A single hexadecimal digit is represented by? 

  Відповідь

  (C)

  four bits 
• 46

  The decimal fraction 0.9375 converts to binary? 

  Відповідь

  (C)

   0.1111. 
• 47

  The EBCDIC coding system was developed on? 

  Відповідь

  (A)

   IBM mainframe computers. 
• 48

  Which of the following is not a criterion files? 

  Відповідь

  (C)

  Storage medium 
• 49

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

  I File

  ll. Field

  III. Character

  IV, Record

   

  Відповідь

  (A)

  III, II, I and IV 
• 50

   

  Which of the following statements best describes sequential file organization? 

  Відповідь

  (C)

  Records are sorted according to a key field.