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Iteration

Quiz by GCSE Computer Science Teacher 4

GCSE (AQA)
Computer Science
English National Curriculum

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10 questions
Show answers
  • Q1
    What is meant by iteration?
    Iteration is a looping a section of code
    Iteration is executing the lines in order line by line
    Iteration is checking whether a condition is false
    Iteration is checking whether a condition is true
    45s
    3.2.2.b
  • Q2
    What is the difference between a definite iteration and indefinite iteration?
    An indefinite iteration will loop a certain amount of times and a definite iteration will loop until a condition is met
    A definite iteration will loop a certain amount of times and a indefinite iteration will loop until a condition is met
    A definite and indefinite iteration will loop forever
    A definite and indefinite iteration will check if a condition is true
    60s
    3.2.2.b
  • Q3
    What does REPEAT UNTIL mean?
    The loop will continue until a condition is met
    The section of code will iteration while a condition is true
    The section of code will iterate to the maximum number
    The section of code will iterate for a certain amount of times
    45s
    3.2.2.b
  • Q4
    Which is the correct structure for a REPEAT-UNTIL loop?
    REPEAT UNTIL
    FOR i <-- 1 to 10 END FOR
    REPEAT END REPEAT
    WHILE END WHILE
    45s
    3.2.2.b
  • Q5
    What is the purpose of this piece of code?
    Question Image
    To check if the number is higher or lower than the guess
    To loop from 1 to 10
    To check if the number is equal to the guess
    It will keep repeating forever
    45s
    3.2.2.b
  • Q6
    Why would you use a WHILE iteration instead of a REPEAT UNTIL?
    It uses less amount code
    A while loop is significantly faster
    It's less processor heavy
    A REPEAT UNTIL must happen at least once and this may not always be desirable.
    45s
    3.2.2.b
  • Q7
    Which program will set off an alarm if the temperature goes below 10 degrees?
    REPEAT OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    temp <-- USERINPUT WHILE temp < 10 OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    temp <-- USERINPUT WHILE TRUE warningBeep() temp <-- USERINPUT END WHILE
    temp <-- USERINPUT WHILE temp = 10 OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    120s
    3.2.2.b
  • Q8
    What is meant by a count-controlled loop?
    A count-controlled loop will loop forever
    A count-controlled loop will check if a condition is true
    A count-controlled loop will be an indefinite loop
    A count-controlled loop will iterate a certain amount of times
    45s
    3.2.2.b
  • Q9
    Which is the correct format for a count-controlled loop?
    temp <-- USERINPUT WHILE temp = 10 OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    temp <-- USERINPUT WHILE temp < 10 OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    REPEAT OUTPUT warningBeep() temp <-- USERINPUT END WHILE
    FOR i <-- 1 to 10 END FOR
    45s
    3.2.2.b
  • Q10
    Which program will ask the user to work out the average test score for 30 pupils. The teacher needs to input each score?
    FOR i <-- 1 to 20 mark <-- USERINPUT totalScore = mark + totalScore END FOR average = totalScore / 30
    DO mark <-- USERINPUT totalScore = mark + totalScore UNTIL average = totalScore / 30
    WHILE MARK < 30 mark <-- USERINPUT totalScore = mark + totalScore average = totalScore / 30
    FOR i <-- 1 to 30 mark <-- USERINPUT totalScore = mark + totalScore END FOR average = totalScore / 30
    120s
    3.2.2.b

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