FLIP FLOPS MCQs
1. Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?
- a) Low input voltages
- b) Synchronous operation
- c) Gate impedance
- d) Cross coupling
answer is (d).
2. The truth table for an S-R flip-flop has how many VALID entries?
- a) 1
- b) 2
- c) 3
- d) 4
answer is (c).
3. When both inputs of a J-K flip-flop cycle, the output will ___________
- a) Invalid
- b) Change
- c) Not change
- d) Toggle
answer is (c).
4. A basic S-R flip-flop can be constructed by cross-coupling of which basic logic gates ?
- a) AND or OR gates
- b) XOR or XNOR gates
- c) NOR or NAND gates
- d) AND or NOR gates
answer is (c).
5. The logic circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called ________________
- a) Combinational circuits
- b) Sequential circuits
- c) Latches
- d) Flip-flops
answer is (b).
6. The output of the sequential circuit depends upon _________
- a) Present input
- b) Past input
- c) Present input and present state
- d) None of the above
answer is (c).
7. How many types of sequential circuits are?
- a) 2
- b) 3
- c) 4
- d) 5
answer is (a).
8. The flip flops are categorized into ________
- a) One
- b) Two
- c) Three
- d) Four
answer is (d).
9. When the set is enabled in S-R flip flop then the output will be __________
- a) Set
- b) Reset
- c) No change
- d) Indeterminate
answer is (a).
10. In which flip flop the present input will be the next output?
- a) S-R
- b) J-K
- c) D
- d) T
answer is (c).
11. The clear input is used to make output ______
- a) Q=1
- b) Q=0
- c) Invalid
- d) No change
answer is (b).
12. When both set and reset are enabled in S-R flip flop then the output will be __________
- a) Set
- b) Reset
- c) No change
- d) Indeterminate
answer is (d).
13. When preset=1, clear=0 then the output will be ________
- a) One
- b) Zero
- c) Not used
- d) FF operation
answer is (a).
14. The preset input is used to make output ______
- a) Q=1
- b) Q=0
- c) Invalid
- d) No change
answer is (a).
15. In SR to JK flip flop conversion which one is an available flip flop?
- a) SR
- b) JK
- c) T
- d) Both SR and JK
answer is (a).
16. There are total ______ steps for flip flop conversions
- a) One
- b) Two
- c) Three
- d) Five
answer is (d).
17. How many possible conversions are there to convert SR flip flop to other flip flops?
- a) One
- b) Two
- c) Three
- d) Four
answer is (c).
18. A flip flop is an __________
- a) Edge sensitive device
- b) Synchronous device
- c) Both a and b
- d) None of the above
answer is (c).
19. _________ are the applications of flip flops.
- a) Registers
- b) Counters
- c) Storage devices
- d) All of the above
answer is (d).
20. How many types of latches are there?
- a) One
- b) Two
- c) Six
- d) Four
answer is (c).
50 top MCQs on DIODES and its applications
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