WAEC Computer Studies 2025 Objective — Question 11

Question 11 of 50 from the West African Examinations Council (WAEC) Computer Studies 2025 Objective paper, with the correct answer and a full explanation.

If the input variable X in Figure 1 is passed through the device in Figure 2 before going into the logic gate in Figure 1, what will be the output Z?

• A. 1001
• B. 0100Correct
• C. 1101
• D. 1110

Explanation

Figure 2 is a NOT gate. X = 0011 after passing through the NOT gate becomes 1100. Then Z = X AND Y = 1100 AND 0101 = 0100.

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