Logic Gate Symbols

Part of Logic Gates · Section 5 of 9

DiagramUnit: 3.4 Computer SystemsGCSE

This diagram covers Logic Gate Symbols within Logic Gates for GCSE Computer Science. Revise Logic Gates in 3.4 Computer Systems for GCSE Computer Science with 16 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 5 of 9 in this topic. Focus on the labels, the relationships between parts, and the explanation that turns the diagram into an exam-ready answer.

Logic Gate Symbols

AND Gate A B Q Q = A AND B Output 1 if BOTH inputs 1 OR Gate A B Q Q = A OR B Output 1 if ANY input 1 NOT Gate A Q Q = NOT A Output is OPPOSITE of input Key Recognition Points: AND = Flat back • OR = Curved back • NOT = Triangle with bubble

Practice questions for Logic Gates

An AND gate has inputs A=1 and B=0. What is the output?

  • A. 0
  • B. 1
  • C. Always 1
  • D. Always 0
1 markfoundation

Complete the truth table for an OR gate with two inputs A and B. | A | B | Output | |---|---|--------| | 0 | 0 | | | 0 | 1 | | | 1 | 0 | | | 1 | 1 | |

3 marksstandard

Quick recall flashcards

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The Three Basic Gates

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Truth Tables - All Possible Combinations

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