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Computer Science · Oct / Nov 2021 · Paper 11 · Question 6

0478

As printed in the paper

The question as text

Six statements are given about the role of components in the Central Processing Unit (CPU).

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

Show the answer and mark scheme

  • 6(a)[6]

    One mark per each correct row.

    Statement

    MAR

    MDR

    PC (✓)

    (✓)

    (✓) it is a register in the CPU

    it holds the address of the next instruction to

    (✓)

    be processed

    it holds the address of the data that is about

    (✓) to be fetched from memory

    it holds the data that has been fetched from

    memory

    it receives signals from the control unit

    it uses the address bus to send an address
    to another component

  • 6(b)[1]

    Arithmetic Logic Unit // ALU
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