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Computer Science · May / June 2021 · Paper 12 · Question 1

0478

As printed in the paper

The question as text

A denary value can be converted into hexadecimal and binary.

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

Show the answer and mark scheme

  • 1(a)[6]

    One mark per each correct binary value.

    One mark per each correct hex value.

    Denary

    Hexadecimal

    8-bit binary

    49

    31

    00110001

    123

    7B

    01111011

    200

    C8

    11001000

  • 1(b)[2]

    Any two from:

    Easier/quicker to read/write/understand
    Easier/quicker to identify errors/debug
    Takes up less screen/display space
    Less chance of making an error

  • 1(c)[3]

    Any three from:

    MAC address
    URL
    Assembly language
    Error codes // error messages
    IP addresses
    Locations in memory
    Memory dumps
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