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O-LevelComputer ScienceBoolean logic2210/23 · Oct/Nov 2024 · Q34 Marks

Four logic gates and five logic gate symbols are shown. Draw one line to link each logic gate to its correct symbol. Not all logic gate symbols will be used. Logic gate AND NAND NOR XOR Logic gate symbol [Diagram of logic gate symbols]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.

  1. One mark for each correct line
  2. AND connects to the symbol: a D shape with a flat back.
  3. NAND connects to the symbol: a D shape with a flat back and a small circle on the output.
  4. NOR connects to the symbol: a concave back with a small circle on the output.
  5. XOR connects to the symbol: a concave back with a curved input line and a small circle on the output.

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About this question

Topic
Boolean logic, O-Level Computer Science (syllabus 2210). Structured question, 4 marks.
Source
O-Level Computer Science, Oct/Nov 2024 Paper 2 Variant 3, question 3.

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