11. The race-around condition occurs when
- J=0, K=0
- J=0, K=1
- J=1, K=0
- J=1, K=1
12. D flip-flop can be made from JK flip-flop by making
- J=K
- J=K=1
- J=0, K=1
- J=K’
13. In a JK flip-flop, J is connected to Q’ and K is connected to Q outputs. The JK flip-flop converts into a
- RS flip-flop
- D flip-flop
- T flip-flop
- Clocked RS flip-flop
14. A master-slave configuration consists of two identical flip-flops connected in such a way that the output of the master is input to the slave. Which one of the following is correct?
- Master is level triggered and slave is edge-triggered
- Master is edge triggered and slave is level triggered
- Master is positive edge triggered and slave is negative edge triggered
- Master is negative edge triggered and slave is positive edge triggered
15. A basic S-R flip-flop can be constructed by cross-coupling of which basic logic gates?
- AND or OR gates
- XOR or XNOR gates
- NOR or NAND gates
- AND or NOR gates
16. In S-R flip-flop, if Q = 0 the output is said to be _____
- Set
- Reset
- No change
- current state
17. T flip-flop is used as
- Transfer data circuit
- Toggle switch
- Time delay switch
- None of the above
18. A ring counter consisting of five flip-flops will have
- 5 states
- 10 states
- 32 states
- Infinite states
19. A square wave with a period of 10 μs drives a T flip-flop. The period of the output signal will be
- 100 μs
- 20 μs
- 10 ms
- 5 ms
20. The maximum possible number of states in a ripple counter with 5 flip-flops is
- 32
- 15
- 10
- 5