WAEC Computer Studies 2021 Objective — Question 12

Question 12 of 50 from the West African Examinations Council (WAEC) Computer Studies 2021 Objective paper, with the correct answer and a full explanation.

12. Which of the logic gates will give an opposite to the state? (Figure 2)

• A. XCorrect
• B. Y
• C. Z
• D. X and Y

Explanation

Gate X (an inverter/NOT-type gate in the figure) produces an output that is the opposite (complement) of its input state.

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