# 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