Lesson T4.4.2

T4.4.2 Programmable microcontrollers Quiz: KS3 Design & Technology, Unit 4

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson T4.4.2, Programmable microcontrollers: 20 multiple choice questions for the KS3 Design & Technology (National Curriculum), Unit 4: Technical knowledge, written with Revision Ninja.

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The 20 questions

  1. What is a microcontroller?

    • An analogue sensor
    • A programmable computer chip
    • A mechanical relay
    • A power supply unit

  2. Which component on a microcontroller board converts physical movement into an electrical signal?

    • Actuator
    • Resistor
    • Sensor
    • Buzzer

  3. Which programming structure repeats instructions while a specific condition remains true?

    • A loop
    • A variable declaration
    • An input sequence
    • A selection block

  4. What type of output device is a standard hobby servo motor classified as?

    • Controller
    • Processor
    • Sensor
    • Actuator

  5. What is the term for a named memory location that stores changing data?

    • Constant
    • Terminal
    • Output
    • Variable

  6. Which voltage level typically represents a logic high state in standard digital electronics?

    • Minus five volts
    • Zero volts
    • Twelve volts
    • Five volts

  7. Why are microcontrollers used instead of fixed hardware circuits in smart products?

    • Cheaper wiring
    • Infinite battery
    • Programmable behaviour
    • Higher voltage

  8. What is the main function of digital pins on a microcontroller board?

    • Amplify weak signals
    • Handle binary states
    • Measure continuous voltage
    • Regulate supply power

  9. When lighting an LED via a switch, which step must happen first?

    • Read switch input
    • Add a delay
    • Clear memory
    • Turn LED on

  10. An 'if' statement controlling a fan based on temperature is an example of what?

    • A selection structure
    • An analogue input
    • A variable assignment
    • An infinite loop

  11. What type of digital signal uses only two discrete states to transmit data?

    • Analogue
    • Binary
    • Variable
    • Continuous

  12. What is the process of finding and correcting errors in code called?

    • Debugging
    • Soldering
    • Rendering
    • Compiling

  13. A counter variable starts at 0 and increases by 1 each time a loop runs. What is its value after 5 loops?

    • 4
    • 0
    • 6
    • 5

  14. A microcontroller checks a sensor 10 times each second. How long is there between each check?

    • 1 second
    • 0.1 seconds
    • 10 seconds
    • 0.01 seconds

  15. What is the purpose of adding comments to computer code?

    • Explain the code
    • Trigger subroutines
    • Define global variables
    • Speed up execution

  16. Why are sensor thresholds often stored in variables?

    • Prevent syntax errors
    • Easy single updates
    • Increase processing speed
    • Save physical memory

  17. In an input, process, output system, what does the processing stage perform?

    • Displaying output text
    • Decisions and calculations
    • Sensing light levels
    • Storing permanent power

  18. Which programming structure ensures a microcontroller responds instantly to a button?

    • Fixed delay
    • Linear sequence
    • Nested subroutine
    • Continuous loop

  19. Why do beginners often use visual block languages for microcontrollers?

    • Increase processor speed
    • Improve screen resolution
    • Reduce memory usage
    • Avoid typing syntax

  20. How can you convert a sensor reading of 500 down to a range of 0 to 100?

    • Hardware reset
    • Binary search
    • Mapping calculation
    • Logical inversion

All KS3 Design & Technology quizzes