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Sorting Algorithms: Bubble and Merge

Quiz by GCSE AQA Computer Science

GCSE (AQA)
Computer Science
English National Curriculum

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12 questions
Show answers
  • Q1
    Which algorithm iterates through a data set repeatedly, swapping values that are in the wrong order?
    Binary
    Merge
    Linear
    Bubble
    45s
    3.1.4.a
  • Q2
    Using a bubble sort on the following list: 3, 17, 6, 5, 8. What will the list look like after the first pass?
    3,5,6,8,17
    3,17,6,8,5
    3,6,5,8,17
    17,8,6,5,3
    45s
    3.1.4.a
  • Q3
    Using a bubble sort on the following list: 3, 17, 6, 5, 8. What will the list look like after the second pass?
    17,8,6,5,3
    3,5,6,8,17
    3,5,6,8,17
    3,17,6,8,5
    45s
    3.1.4.a
  • Q4
    How many passes would the following list (3,17,6,5,8) need to sort it using a bubble sort?
    One
    Two
    Three
    Four
    45s
    3.1.4.a
  • Q5
    Why do you need an additional pass through a list at the end of a bubble sort?
    You do not need a final pass
    To make the algorithm more complex
    As a final validation check
    To make it look neater
    45s
    3.1.4.a
  • Q6
    What is the first action in a merge sort?
    To compare the first two values
    To compare the last two values
    To split the items up into their own data sets
    To split the data set at the middle value
    45s
    3.1.4.a
  • Q7
    Which sorting algorithm needs to iterate through the list repeatedly?
    Binary
    Merge
    Bubble
    Linear
    45s
    3.1.4.a
  • Q8
    Which sorting algorithm splits a list of items into individual lists?
    Linear
    Merge
    Bubble
    Binary
    45s
    3.1.4.a
  • Q9
    What sorting algorithm does this pseudocode represent?
    Question Image
    Bubble
    Linear
    Binary
    Merge
    45s
    3.1.4.a
  • Q10
    Which sorting algorithm uses the divide and conquer approach to sorting data sets?
    Bubble
    Insertion
    Merge
    None of these
    45s
    3.1.4.a
  • Q11
    What does a sorting algorithm do?
    Sorts data sets into alphabetical or numerical order
    Searches data sets by comparing values
    Writes data items to an array or list
    Saves data items in an array or list
    45s
    3.1.4.a
  • Q12
    How can a trace table help with sorting algorithms?
    All of these
    It can be used to keep track of where you have previously swapped values
    You can use it to test the algorithm for logical errors
    It can be used to keep track of progression through the swaps or passes
    45s
    3.1.4.a

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