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Computer Science · Oct / Nov 2020 · Paper 11 · Question 9

0478

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The question as text

Victoria is entering data into a computer system. The data will be transmitted to cloud storage.

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  • 9(a)[4]

    1
    0
    0
    0

  • 9(b)[2]

    Two from:

    Checksum
    Automatic repeat request // ARQ

  • 9(c)[4]

    Any four from:

    Data is input with check digit
    A calculation is performed on the (inputted) data // by example
    The calculated digit is compared to a stored value
    If it matches, the data entered is correct
    If it does not match, the data entered is incorrect
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