JAMB and WAEC Computer Studies questions

548 questions with answers and explanations. Tap an option to check yourself.

1. Question 221· Data processing and information· WAEC

   Real-time processing is required for

   • Ayearly reports
   • Bmonthly bills
   • Cair traffic control
   • Dprinting certificates

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   Explanation and discussion

2. Question 222· Data processing and information· JAMB

   The system development life cycle begins with

   • Aproblem identification and a feasibility study
   • Bmaintenance
   • Ccoding
   • Dtesting

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3. Question 223· Data processing and information· JAMB

   Data validation checks that data is

   • Areasonable and within acceptable rules
   • Bcorrectly copied from the source
   • Cencrypted
   • Dbacked up

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   Explanation and discussion

4. Question 224· Data processing and information· JAMB

   In sequential file organisation, records are

   • Aindexed only
   • Breached directly by address
   • Cstored randomly
   • Dstored and read one after another in order

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5. Question 225· Data processing and information· WAEC

   Checking that an age entered lies between 10 and 25 is a

   • Aformat check
   • Bpresence check
   • Crange check
   • Dlength check

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   Explanation and discussion

6. Question 226· Data processing and information· WAEC

   Batch processing is suitable for

   • Aa payroll run at the end of each month
   • Bairline seat booking
   • CATM withdrawals
   • Donline chat

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   Explanation and discussion

7. Question 227· Data processing and information· JAMB

   A presence check ensures that

   • Adata is sorted
   • Bdata is in range
   • Cdata is numeric
   • Da required field is not left empty

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8. Question 228· Data processing and information· WAEC

   A collection of related fields describing one item, such as one student, is a

   • Afile
   • Brecord
   • Cdatabase
   • Dbyte

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   Explanation and discussion

9. Question 229· Data processing and information· JAMB

   Data redundancy means

   • Adata loss
   • Bunnecessary duplication of data
   • Cdata encryption
   • Ddata sorting

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   Explanation and discussion

10. Question 230· Data processing and information· WAEC

    Real-time processing is needed for

    • Aarchiving old files
    • Bmonthly payrolls
    • Cend-of-year reports
    • Dairline seat reservations

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    Explanation and discussion

11. Question 231· Data processing and information· WAEC

    Information is

    • Araw facts
    • Bprocessed data that is meaningful
    • Chardware
    • Da program

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12. Question 232· Data processing and information· WAEC

    Raw facts that have not been processed are called

    • Adata
    • Binformation
    • Cknowledge
    • Doutput

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13. Question 233· Data processing and information· JAMB

    Online processing means that

    • Aprocessing is done by hand
    • Bdata is processed later in batches
    • Cno processing occurs
    • Ddata is processed immediately as it is entered

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14. Question 234· Data processing and information· WAEC

    The stages of the data processing cycle are

    • Atyping, printing and saving only
    • Binput, processing, output and storage
    • Cbooting and shutdown
    • Dscanning and copying

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15. Question 235· Data processing and information· WAEC

    Processing transactions in groups at a set time, such as payroll at month end, is

    • Areal-time processing
    • Bbatch processing
    • Conline processing
    • Dinteractive processing

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16. Question 236· Data processing and information· WAEC

    A primary key in a database

    • Ais a printer key
    • Bis a password
    • Cuniquely identifies each record
    • Dis optional for every table

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17. Question 237· Data processing and information· WAEC

    Sorting arranges records

    • Ain a particular order
    • Binto different files
    • Crandomly
    • Dfor deletion

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18. Question 238· Data processing and information· WAEC

    Checking that data entered falls within an acceptable range is

    • Asorting
    • Bverification
    • Cvalidation
    • Dmerging

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19. Question 239· Data processing and information· WAEC

    Arranging records in alphabetical or numerical order is

    • Amerging
    • Bsorting
    • Cdeleting
    • Dprinting

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20. Question 240· Data processing and information· WAEC

    The basic data processing cycle is

    • Ainput → processing → output
    • Boutput → input → processing
    • Cprocessing → output → input
    • Dstorage → printing → input

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    Explanation and discussion