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Number bases

Quiz by GCSE Computer Science Teacher 2

GCSE (AQA)
Computer Science
English National Curriculum

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12 questions
Show answers
  • Q1
    How many units are in a base 10 number?
    10
    7
    8
    9
    30s
    3.3.1.a
  • Q2
    Another name for a base 2 number is?
    Hexadecimal
    Denary
    Binary
    Quaternary
    30s
    3.3.1.a
  • Q3
    How many digits are used in a binary number system?
    4
    2
    5
    3
    30s
    3.3.1.a
  • Q4
    How many different digits are represented in a hexadecimal number system?
    10
    8
    2
    16
    30s
    3.3.1.a
  • Q5
    Which number system uses letters to represent the numbers 10 to 15?
    Binary
    Hexadecimal
    Denary
    Decimal
    30s
    3.3.1.a
  • Q6
    What is indicated by a number base?
    How many pieces of data can be stored in a system
    How many digits are available in a number system
    How long it takes to process data.
    How many calculations can be perfomed at the same time.
    30s
    3.3.1.a
  • Q7
    In a denary number system, the place value of digits representing thousands is ten to the power?
    5
    4
    3
    2
    30s
    3.3.1.a
  • Q8
    Why do computers use binary to represent data an instructions?
    Computers have limited memory to store information
    Humans find binary easy to understand
    1's and 0's can easily be represented as a pattern of on and off electrical signals.
    Computers require data be broken down into the smallest possible units
    30s
    3.3.1.a
  • Q9
    Place values of hexadecimal numbers are calculated in powers of?
    2
    4
    8
    16
    30s
    3.3.1.a
  • Q10
    Programmers use hexadecimals because one hexadecimal digit is equivalent to?
    4 place values
    4 denary digits
    4 binary digits
    4 decimal digits
    30s
    3.3.1.a
  • Q11
    Expressing values in hexadecimals uses fewer digits which reduces the risk of?
    Making an error when programming
    Making a computer overheat
    Using all of the compute cycles in a processor
    Using too much electricity when running a computer
    30s
    3.3.1.a
  • Q12
    Pair of hexadecimal digits are used in the format RRGGBB to represent?
    Display error messages
    Colours on a webpage
    Locations in computer memory
    To represent MAC addresses
    30s
    3.3.1.a

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