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Credit Extension Questions Set 2

 
COMMERCIAL DATA PROCESSING
   
KU
PS
         
1. Gail has just been sent a new Debit card from her bank. It is a smart card.    
  a. What is the difference between a smart card and a card with a magnetic stripe?
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  b. Gail goes to a shop that has 250 000 different items of stock. Information about each item is held in a stock file which is accessed and updated every time an item is sold.
    (i) Give one example of a storage medium which can only be accessed sequentially.
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    (ii) Give one example of a storage medium which can only be accessed randomly.
1
     
    (iii) What storage medium should be used for the stock file?
Give a reason for your answer.
2
     
  c. Each item that the superstore sells has a unique code that includes a check digit.

Is a check digit an example of validation or verification?
Give a reason for your answer.
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  d. Computer crime is a problem companies with computer systems have to be aware of.
    (i) Give two examples of computer crime.
2
    (ii) Describe two ways in which the Computer Misuse Act outlaws computer crime.
2
     
   
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RESOURCES
Walsh J: Computing Studies . - Chapter 13

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