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O-LevelComputer ScienceSoftware2210/12 · Oct/Nov 2017 · Q64 Marks

Selma writes the following four answers in her Computer Science examination. State which computer terms she is describing. "It is a signal. When the signal is received it tells the operating system that an event has occurred." Selma is describing .......................................................................................................................................................... "It takes source code written in a high level language and translates it into machine code. It translates the whole of the source code at once." Selma is describing .......................................................................................................................................................... "The part of the central processing unit (CPU) that carries out calculations." Selma is describing .......................................................................................................................................................... "When data is transmitted, if an error is detected in the data received a signal is sent to ask for the data to be retransmitted. This continues until the data received is correct." Selma is describing ..........................................................................................................................................................

  1. Selma writes the following four answers in her Computer Science examination. State which computer terms she is describing. "It is a signal. When the signal is received it tells the operating system that an event has occurred." Selma is describing .......................................................................................................................................................... "It takes source code written in a high level language and translates it into machine code. It translates the whole of the source code at once." Selma is describing .......................................................................................................................................................... "The part of the central processing unit (CPU) that carries out calculations." Selma is describing .......................................................................................................................................................... "When data is transmitted, if an error is detected in the data received a signal is sent to ask for the data to be retransmitted. This continues until the data received is correct." Selma is describing ..........................................................................................................................................................[4]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.

  1. [1] Interrupt
  2. [1] Compiler
  3. [1] ALU/Arithmetic and Logic Unit
  4. [1] ARQ/Automatic repeat request

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About this question

Topic
Software, O-Level Computer Science (syllabus 2210). Structured question, 4 marks.
Source
O-Level Computer Science, Oct/Nov 2017 Paper 1 Variant 2, question 6.

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