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A logic circuit is designed to implement the Boolean expression:

Output X=(A AND B) OR (NOT B) \text{Output } X = (A \text{ AND } B) \text{ OR } (\text{NOT } B) Output X=(A AND B) OR (NOT B)

The diagram in Figure 1 shows this circuit where the actual gates have been replaced by generic boxes labeled Gate 1, Gate 2, and Gate 3.

A logic circuit diagram with two inputs, A and B. Input A and Input B both connect to Gate 1. Input B also branches off to connect to Gate 2. The output of Gate 1 and the output of Gate 2 both connect to Gate 3, which produces the final Output X.

Draw the standard logic circuit symbol for the logic gate that must be used at Gate 3 to correctly implement the expression.

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Boolean logic Questions

Practise AQA GCSE Computer Science Boolean logic with exam-style questions for GCSE Computer Science. 83 questions, matched to the AQA GCSE Computer Science (8525) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Boolean logic Questions

  1. GCSE
  2. /Computer Science
  3. /Boolean logic