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Computer System Design · Quiz 2 · 16 Aug 2026 · May 2026 term

Question 14: For the circuit shown in Figure 1, D1 and D2 are positiv…

Question 14

+5 marksOne correct option

For the circuit shown in Figure 1, D1 and D2 are positive-edge-triggered D flip-flops with inputs x1 and x2 respectively, and their outputs Q1, Q2 feed into an XOR gate to produce Y . Which of the following correctly gives the Boolean expression for Y and the condition under which Y = 1?

  1. A

    Y = Q1 · Q2; Y = 1 whenever x1 = x2 = 1 at the previous rising edge of CLK

  2. B
  3. C

    Y = Q1 + Q2; Y = 1 whenever either x1 or x2 was 1 at the previous rising edge of CLK

  4. D
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Correct answer

  • B
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Question 14 of 15 in the IIT Madras BS Computer System Design (Computer System Design) Quiz 2 paper sat on 16 Aug 2026, in the May 2026 term (Computer Systems Design 16 Aug 26). It carries 5 marks.

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