# Realisation of One Flip-Flop using Other Flip-Flops MCQ’s

This set of Digital Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Realisation of One Flip-Flop using Other Flip-Flops”.

1. For realisation of JK flip-flop from SR flip-flop, the input J and K will be given as ___________

a) External inputs to S and R

b) Internal inputs to S and R

c) External inputs to combinational circuit

d) Internal inputs to combinational circuit

2. For realisation of JK flip-flop from SR flip-flop, if J=0 & K=0 then the input is ___________

a) S=0, R=0

b) S=0, R=X

c) S=X, R=0

d) S=X, R=X

3. To realise one flip-flop using another flip-flop along with a combinational circuit, known as ____________

a) PREVIOUS state decoder

b) NEXT state decoder

c) MIDDLE state decoder

d) PRESENT state decoder

4. For realisation of JK flip-flop from SR flip-flop, if J=1, K=0 & present state is 0(i.e. Q(n)=0) then excitation input will be ___________

a) S=0, R=1

b) S=X, R=0

c) S=1, R=0

d) S=1, R=1

5. For realisation of SR flip-flop from JK flip-flop, if S=1, R=0 & present state is 0 then next state will be ___________

a) 1

b) 0

c) Don’t care

d) Toggle

6. The K-map simplification for realisation of SR flip-flop from JK flip-flop is ___________

a) J=1, K=0

b) J=R, K=S

c) J=S, K=R

d) J=0, K=1

7. For realisation of SR flip-flop from JK flip-flop, the excitation input will be obtained from ___________

a) S and R

b) R input

c) J and K input

d) D input

8. For realisation of SR flip-flop from JK flip-flop, if S=1, R=0 & present state is 0 then the excitation input will be ___________

a) J=1, K=1

b) J=X, K=1

c) J=1, K=X

d) J=0, K=0

9. For realisation of D flip-flop from SR flip-flop, the external input is given through ___________

a) S

b) R

c) D

d) Both S and R

10. For D flip-flop to JK flip-flop, the characteristics equation is given by ___________

a) D=JQ(p)’+Q(p)K’

b) D=JQ(p)’+KQ(p)’

c) D=JQ(p)+Q(p)K’

d) D=J’Q(p)+Q(p)K

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