JAMB Computer Studies questions: Data processing and information

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

1. Question 1· Data processing and information· JAMB

   Raw facts that have not been processed are

   • Adata
   • Binformation
   • Cknowledge
   • Doutput

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2. Question 2· Data processing and information· JAMB

   A record in a file is

   • Aa program
   • Ba single character
   • Ca whole database
   • Da collection of related fields about one item

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   Explanation and discussion

3. Question 3· Data processing and information· JAMB

   Information technology refers to

   • Athe use of computers and telecommunications to store, process and transmit information
   • Bonly typing
   • Conly printing
   • Donly radio

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4. Question 4· Data processing and information· JAMB

   Processed data that is meaningful to the user is

   • Anoise
   • Braw data
   • Cinput
   • Dinformation

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5. Question 5· Data processing and information· JAMB

   SQL is a language used to

   • Aquery and manage databases
   • Bdesign hardware
   • Ccreate animations
   • Dwrite operating systems only

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6. Question 6· Data processing and information· JAMB

   Data integrity means that data is

   • Alarge
   • Bsecret
   • Caccurate and consistent
   • Ddeleted

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7. Question 7· 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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8. Question 8· 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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9. Question 9· 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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10. Question 10· 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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11. Question 11· Data processing and information· JAMB

    Data redundancy means

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

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12. Question 12· 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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13. Question 13· Data processing and information· JAMB

    A transaction file contains

    • Aprograms
    • Bthe main permanent data
    • Crecords of day-to-day changes used to update the master file
    • Dbackups only

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14. Question 14· Data processing and information· JAMB

    Checking that data entered is reasonable and within allowed limits is

    • Avalidation
    • Bsorting
    • Cmerging
    • Dformatting

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15. Question 15· Data processing and information· JAMB

    A check digit is used to

    • Acompress files
    • Bencrypt data
    • Csort records
    • Ddetect errors in codes such as ISBNs

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16. Question 16· Data processing and information· JAMB

    A database management system (DBMS) allows users to

    • Aplay music
    • Bdraw pictures
    • Ccreate, store and retrieve data efficiently
    • Dbrowse the web

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17. Question 17· Data processing and information· JAMB

    A key field is used to

    • Aidentify and sort records
    • Bcolour a record
    • Cdelete a file
    • Dprint a report

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18. Question 18· Data processing and information· JAMB

    A master file contains

    • Aerror messages
    • Beach day's transactions only
    • Cprograms
    • Drelatively permanent main data such as customer details

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    Explanation and discussion