Lesson T4.3.2

T4.3.2 Manipulating digital data Quiz: KS3 Computing, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T4.3.2, Manipulating digital data: 20 multiple choice questions for the KS3 Computing (National Curriculum), Unit 4: Computer systems, written with Revision Ninja.

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The 20 questions

  1. What is the denary value of the binary number 1101?

    • 9
    • 15
    • 11
    • 13

  2. Convert the denary number 6 to binary.

    • 011
    • 101
    • 100
    • 110

  3. What is 0101 + 0011 in binary?

    • 1001
    • 0110
    • 1110
    • 1000

  4. What is 1101 + 0011 in binary?

    • 10100
    • 1100
    • 1110
    • 10000

  5. Under what condition does an AND gate output a value of 1?

    • Both inputs 1
    • One input 1
    • Both inputs 0
    • Any input 1

  6. What does an OR gate output when one input is 1 and the other is 0?

    • 1
    • 0
    • 11
    • 10

  7. What action does a NOT logic gate perform on its input?

    • Deletes input
    • Copies input
    • Doubles input
    • Reverses input

  8. Which Boolean expression correctly requires both pupil status and a valid password?

    • Pupil XOR password
    • Pupil NOT password
    • Pupil OR password
    • Pupil AND password

  9. What is the output of a NOT gate if fed by an active AND gate?

    • 0
    • Null
    • 1
    • True

  10. Why is run-length encoding classed as lossless compression?

    • No data lost
    • File size increases
    • Image quality drops
    • Colours are removed

  11. Using run-length encoding, how would the text AAAABBBCC be written?

    • 4A3B2C
    • A4B3C2
    • 4A5BC
    • AB4C3

  12. What happens to the value of a binary number when shifted left?

    • It stays same
    • It halves
    • It becomes zero
    • It doubles

  13. What is 1111 plus 1 in 4-bit binary arithmetic?

    • 10000
    • 1111
    • 0000
    • 1000

  14. Which logic operation reverses every bit in a binary number?

    • AND
    • OR
    • NOT
    • XOR

  15. A computer adds the binary numbers 0111 and 0001. What is the result?

    • 0110
    • 1010
    • 0100
    • 1000

  16. What is the main purpose of a truth table?

    • Convert binary code
    • Draw logic gates
    • Measure circuit speed
    • Show all outcomes

  17. Which programming construct evaluates a Boolean condition?

    • Print command
    • Variable assignment
    • For loop
    • IF statement

  18. Why do processors use binary addition?

    • To store power
    • To format screens
    • To cool hardware
    • To calculate data

  19. What is the result of shifting 0101 one place right?

    • 1100
    • 0010
    • 1010
    • 0100

  20. Which search query uses a Boolean AND operator?

    • Cats NOT dogs
    • Cats AND dogs
    • Cats OR dogs
    • Cats XOR dogs

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