O-LevelComputer ScienceHardware2210/12 · Oct/Nov 2021 · Q22 Marks

A train company wants to install a self-service ticket machine system for its train stations. When the customer has purchased their tickets, the machine will provide a paper ticket.

(a)One output device that is used in the ticket machine is a display screen. Identify one other output device that is used in the ticket machine system.[1]
(b)The train company does not want users to use a keyboard or a mouse to enter their data, when buying a ticket. The company is worried that they may be stolen or get too dirty. Identify one other input device that would be suitable for use in the ticket machine system, to allow users to enter their data.[1]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2021). The mark or mark type is shown in brackets.

2(a) Any one from: - Printer; - Speaker; - Light/LED; - Actuator
2(b) Any one from: - Touchscreen; - Trackpad / touchpad; - Microphone; - QR code reader; - Barcode reader; - Magnetic strip reader; - RFID reader

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Topic: Hardware, O-Level Computer Science (syllabus 2210). Structured question, 2 marks.
Source: O-Level Computer Science, Oct/Nov 2021 Paper 1 Variant 2, question 2.

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