GCE Computer Studies 2025 Objective — Question 14

Question 14 of 50 from the General Certificate of Education (GCE) Computer Studies 2025 Objective paper, with the correct answer and a full explanation.

Which one of the following statements is true about logic gates?

A. The output of AND gate is low if both inputs are high
B. The output of AND gate is high if both or either of the inputs is low
C. The output of NOT gate is high if the input is lowCorrect
D. The output of OR gate is low if both inputs are high

Explanation

A NOT gate produces an output that is the opposite of the input. So, if the input to a NOT gate is 0 (low), the output will be 1 (high) and if the input is 1 (high) the output will be 0 (low).

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