NABTEB Computer Studies 2024 Objective — Question 11

Question 11 of 50 from the National Business and Technical Examinations Board (NABTEB) Computer Studies 2024 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 value of output Z?

A. A. 0111
B. B. 1011
C. C. 1101Correct
D. D. 1110

Explanation

Figure 2 is an inverter (NOT gate); it gives the opposite of its input. X(0011) inverted becomes 1100. Feeding 1100 into the OR gate with Y(0101) gives 1101.

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