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Computer Science · Oct / Nov 2021 · Paper 12 · Question 5

0478

As printed in the paper

The question as text

Sammi works for a finance company and has a laptop that he uses for his work. He has confidential data about his customers stored on his laptop. Sammi does not connect the laptop to any networks.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 5(a)[3]

    Any three from:

    Password
    Add a biometric device to the laptop // set biometric password
    Use two-step verification // Use two factor authentication
    Physically lock the laptop away in a secure cupboard // Taking laptop with him at all times

  • 5(b)(i)[3]

    Any three from:

    A compression algorithm is used
    The resolution could be reduced
    Colour depth could be reduced // bits per pixel reduced
    Sounds not heard by human ear could be removed // Perceptual music shaping can be used
    Repeating frames could be removed

  • 5(b)(ii)[1]

    Any one from:

    Quality may be reduced
    Data is lost // original file cannot be reconstructed

  • 5(c)(i)[1]

    Any one from:

    Maintains quality // quality better than lossy
    Original file is retained // Data is not permanently lost
    A significant reduction in file size is not required

  • 5(c)(ii)[2]

    Any two from:

    Takes more time to transmit file // Takes more time to upload to web server // Takes more time to download to customer // Web page will load slower
    Takes up more storage space
    Data usage would be increased
    Uses more bandwidth
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