WAEC - Computer Studies (2020)

  • 1

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

     

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

    Arrange the following inventions in chronological order.

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

     

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

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

     

    Trả lời
    (D)
    OR
  • 10

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

     

     

    Trả lời
    (B)
    1. 
  • 11

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

     

     

     

     

    Trả lời
    (B)
    1. 
  • 12

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

     

    Trả lời
    (C)
    a 64-bit data bus. 
  • 13

    Which of the following memory types are nonvolatile?

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

     

    Trả lời
    (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

     

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

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

     

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

     

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

     

    Trả lời
    (D)
    P *(1 + R /100) ^N
  • 24
    An algorithm can be described as? 
    Trả lời
    (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? 
    Trả lời
    (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 . 
    Trả lời
    (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? 
    Trả lời
    (A)
     barcode. 
  • 28
    A rectangular image consisting of black lines and white spaces representing data which can be optically read is called? 
    Trả lời
    (A)
     barcode. 
  • 29
    The following are types of data network except? 
    Trả lời
    (A)
    MAC. 
  • 30
    The minimum number of computers that can constitute a network is? 
    Trả lời
    (D)
    two.
  • 31
    If a computer user wants to access the national database from a remote location, the user will require a? 
    Trả lời
    (C)
    communication software, telephone line and decoder. 
  • 32

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

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

     

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

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

    I File

    ll. Field

    III. Character

    IV, Record

     

    Trả lời
    (A)
    III, II, I and IV 
  • 50

     

    Which of the following statements best describes sequential file organization? 

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