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Computer Science · Oct / Nov 2024 · Paper 12 · Question 3

0478

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The question as text

A user enters data that is hexadecimal into a computer system. The data is converted to binary to be processed by the computer.

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  • 3(a)(i)[1]

    They are both number systems

  • 3(a)(ii)[2]

    Binary is base-2 whereas hexadecimal is base-16
    Binary only uses numbers whereas hexadecimal also uses letters // Binary only uses 0 and 1 whereas hexadecimal uses 0 to 9/A to F

  • 3(b)[3]

    (0000)1111
    10110100
    11101011

  • 3(c)[3]

    E
    64
    FA

  • 3(d)(i)[2]

    Any two from:

    Each/All/Every value/digit/bit in the binary number is shifted/moved to the left
    The left most/most significant bit is lost
    A 0 is added as the right most/least significant bit

  • 3(d)(ii)[1]

    The binary integer is multiplied by 2

  • 3(e)[1]

    Two’s complement

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