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Computer Science · Oct / Nov 2022 · Paper 12 · Question 1

0478

As printed in the paper

The question as text

A bus station has a ticket machine. A customer can use the ticket machine to select and pay for their ticket. One input device built into the ticket machine is a touch screen.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 1(a)[2]

    Any two from:

    Keyboard
    Trackpad
    Trackball
    Microphone
    Keypad
    Sensor
    Button
    Barcode/QR scanner/reader
    Webcam/digital camera

  • 1(b)[1]

    Any one from:

    Speaker
    Headphones

  • 1(c)(i)[4]

    Any four from:

    The screen is made up of (two) layers/multiple layers
    The user pushes the top layer into the bottom layer // The user pushes the layers together
    The layers create a circuit (when pushed together)
    causing electricity to flow
    allowing the co-ordinates/location of the users touch to be calculated

  • 1(c)(ii)[2]

    Any two from:

    Cheap to manufacture/buy
    Can still be used whilst wearing gloves
    Waterproof // Can be used in bad weather
    Does not easily shatter
    Low power consumption
    (Can) support multitouch

  • 1(c)(iii)[2]

    Any two from:

    Does not (normally) support multitouch
    Screen visibility can be poor in sunlight
    Longevity issues
    (Normally) lower resolution
    Not very sensitive to touch // Lower response time (than capacitive)
    Prone to scratches

  • 1(c)(iv)[1]

    Any one from:

    Capacitive
    Infrared

  • 1(d)[2]

    Any two from:

    Data and instructions are stored in the same memory
    and can only be fetched one at a time

  • 1(e)[3]

    Any three from:

    Multitasking
    Multiprogramming
    Input and output control
    Running software
    Memory management
    Processor management
    File management
    Handling interrupts
    Providing security
    Managing user accounts
    Batch / real-time processing

  • 1(f)(i)[3]

    000001100100
    000011101011
    000100101101

  • 1(f)(ii)[3]

    22
    119
    857

  • 1(f)(iii)[4]

    One mark for two correct characters in the correct place, two marks for three

    095
    AD1
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