11 mark
The number base 2 is called binary.
Identify one choice to show which number base is called hexadecimal.
6
8
10
16
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Number Bases (AQA GCSE Computer Science)
Exam Questions
8 mins6 questions
21 mark
State the largest decimal number that can be represented using 6 bits.
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31 mark
What is the largest hexadecimal number that can be represented in binary using 8 bits?
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41 mark
Which of the following is a reason why hexadecimal is used instead of binary?
Identify one choice.
A Computers work in hexadecimal, not binary
Hexadecimal can be used to represent a wider range of numbers.
Hexadecimal is a standard language and binary is not.
Hexadecimal is more compact when displayed on screen.
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12 marks
A student’s answer to the question “Why is hexadecimal often used instead of binary?” is shown in Figure 2.
Figure 2
Because it uses fewer digits it will take up less space in a computer’s memory. |
Explain why the student’s answer is incorrect.
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22 marks
Identify two choices to show the statements that are true about hexadecimal.
Hexadecimal can represent a greater range of numbers than binary.
Hexadecimal is easier for people to read than binary.
Hexadecimal is faster for a computer to process than binary.
Hexadecimal is more accurate than binary
Hexadecimal takes less space in RAM than binary.
Hexadecimal takes less time to type than binary.
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