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Cambridge IGCSE Computer Science practice

Paper 1 structured question: Number systems

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Attempt questionNumber systems revisionRevise the key idea

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Number systems

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Paper 1Computer Systems2 marks

Understanding two's complement representation.

Description

Two's Complement Representation

What is the two's complement of the binary number 00000101 (5 in decimal)?

  1. a

    Explain how to find the two's complement of 5.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 1 structured question: Number systems

Paper 1Computer Systems1 marks

Description

Two's Complement Conversion

Convert the decimal number -3 to its 8-bit two's complement representation.

  1. a

    State the two's complement representation of -3.

    Aim for approximately 1 distinct marking point.

    [1]