Counters problems
- 1. The terminal count of a typical modulus-10 binary counter is ________.
Options- A. 0000
- B. 1010
- C. 1001
- D. 1111 Discuss
Correct Answer: 1001
- 2. What is the difference between combinational logic and sequential logic?
Options- A. Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
- B. Combinational and sequential circuits are both triggered by timing pulses.
- C. Neither circuit is triggered by timing pulses. Discuss
Correct Answer: Combinational circuits are not triggered by timing pulses, sequential circuits are triggered by timing pulses.
- 3. The parallel outputs of a counter circuit represent the:
Options- A. parallel data word
- B. clock frequency
- C. counter modulus
- D. clock count Discuss
Correct Answer: clock count
- 4. Which of the following statements are true?
Options- A. Asynchronous events do not occur at the same time.
- B. Asynchronous events are controlled by a clock.
- C. Synchronous events do not need a clock to control them.
- D. Only asynchronous events need a control clock. Discuss
Correct Answer: Asynchronous events do not occur at the same time.
- 5. Which is not an example of a truncated modulus?
Options- A. 8
- B. 9
- C. 11
- D. 15 Discuss
Correct Answer: 8
- 6. What is the maximum delay that can occur if four flip-flops are connected as a ripple counter and each flip-flop has propagation delays of tPHL = 22 ns and tPLH = 15 ns?
Options- A. 15 ns
- B. 22 ns
- C. 60 ns
- D. 88 ns Discuss
Correct Answer: 88 ns
- 7. How many different states does a 3-bit asynchronous counter have?
Options- A. 2
- B. 4
- C. 8
- D. 16 Discuss
Correct Answer: 8
- 8. MOD-6 and MOD-12 counters and multiples are most commonly used as:
Options- A. frequency counters
- B. multiplexed displays
- C. digital clocks
- D. power consumption meters Discuss
Correct Answer: digital clocks
- 9. Once an up-/down-counter begins its count sequence, it cannot be reversed.
Options- A. True
- B. False Discuss
Correct Answer: False
- 10. A MOD-16 ripple counter is holding the count 10012. What will the count be after 31 clock pulses?
Options- A. 10002
- B. 10102
- C. 10112
- D. 11012 Discuss
Correct Answer: 10002
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