WAEC Computer Studies 2025 Objective — Question 12

Question 12 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 Y in Figure 1 is passed through the device in Figure 2 before going into the logic gate in Figure 1, compute the output at Z.

A. 11010
B. 0100
C. 0010Correct
D. 0001

Explanation

Y = 0101 passing through a NOT gate becomes 1010. Then Z = X AND Y = 0011 AND 1010 = 0010.

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