Flips-Flops Questions and Answers
Flip-Flops are the fundamental building blocks of sequential logic circuits used in counters, memory, and data storage. This topic presents digital electronics aptitude questions and answers covering SR, JK, D, and T flip-flops with detailed explanations. Essential for GATE, DRDO, and BEL exam preparation, these MCQs help learners understand timing diagrams, truth tables, and applications in system design. By practicing these Flip-Flops questions with answers, you can master one of the most scoring areas in electronics and digital logic design.
Flips-Flops
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64 questions
11. What is another name for a one-shot?
- Monostable
- Multivibrator
- Bistable
- Astable
12. On a master-slave flip-flop, when is the master enabled?
- when the gate is LOW
- when the gate is HIGH
- both of the above
- neither of the above
13. One example of the use of an S-R flip-flop is as a(n):
- racer
- astable oscillator
- binary storage register
- transition pulse generator
14. What is the difference between the 7476 and the 74LS76?
- the 7476 is master-slave, the 74LS76 is master-slave
- the 7476 is edge-triggered, the 74LS76 is edge-triggered
- the 7476 is edge-triggered, the 74LS76 is master-slave
- the 7476 is master-slave, the 74LS76 is edge-triggered
15. Which of the following is correct for a gated D flip-flop?
- The output toggles if one of the inputs is held HIGH.
- Only one of the inputs can be HIGH at a time.
- The output complement follows the input when enabled.
- Q output follows the input D when the enable is HIGH.
16. With regard to a D latch, ________.
- the Q output follows the D input when EN is LOW
- the Q output is opposite the D input when EN is LOW
- the Q output follows the D input when EN is HIGH
- the Q output is HIGH regardless of EN's input state
17. How can the cross-coupled NAND flip-flop be made to have active-HIGH S-R inputs?
- It can't be done.
- Invert the Q outputs.
- Invert the S-R inputs.
18. When is a flip-flop said to be transparent?
- when the Q output is opposite the input
- when the Q output follows the input
- when you can see through the IC packaging
19. Master-slave J-K flip-flops are called pulse-triggered or level-triggered devices because input data is read during the entire time the clock pulse is at a LOW level.
- TRUE
- FALSE
20. Which of the following is correct for a D latch?
- The output toggles if one of the inputs is held HIGH.
- Q output follows the input D when the enable is HIGH.
- Only one of the inputs can be HIGH at a time.
- The output complement follows the input when enabled.