Multiple choice

One can convert an SR flip-flop into a D flip-flop when

  1. SR terminals are shorted to each other

  2. both inputs of the SR are kept open and a clock is applied

  3. a NOT gate is connected between the SR inputs

  4. S is made 0 and R is made 0

  5. D flip-flop cannot be made by SR flip-flop.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When NOT is connected in between S and R, and S = 1, then R = 0. An applied clock provides output as Q = 1, so D is 1 and Q is also 1. It is the D condition. When S = 0, then R = 1 and the output is Q = 0. This is also the D condition. Other conditions cannot appear. Hence, this configuration will make SR flip-flop a D flip-flop.

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