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O-LevelComputer ScienceHardware2210/12 · May/June 2021 · Q86 Marks

A keyboard is a type of input device that can be used to enter data into a computer. Complete the paragraph that describes one method of operation for a keyboard, using the most appropriate terms from the given list. Not all terms in the list need to be used. • Binary • Breaks • Calculated • Character • Circuit • Current • Information • Network • Press • Processor • Signal • Switch A keyboard has a key matrix underneath the keys. When a key is pressed, it presses a that completes a This allows to flow. The location of the key pressed is The location of the key pressed is compared to a map to find the has been pressed.

  1. A keyboard has a key matrix underneath the keys. When a key is pressed, it presses a that completes a This allows to flow. The location of the key pressed is The location of the key pressed is compared to a map to find the has been pressed.[6]

Mark scheme

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

  1. [1] First blank: Switch
  2. [1] Second blank: Circuit
  3. [1] Third blank: Current
  4. [1] Fourth blank: Calculated
  5. [1] Fifth blank: Binary
  6. [1] Sixth blank: Character

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About this question

Topic
Hardware, O-Level Computer Science (syllabus 2210). Structured question, 6 marks.
Source
O-Level Computer Science, May/June 2021 Paper 1 Variant 2, question 8.

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