Exam-style question
Try this first
What is the role of the clock signal in a flip‑flop?.
- A.It continuously updates the output as inputs change.
- B.It provides a timing reference that determines when the output can change.
- C.It resets the flip‑flop to zero.
- D.It sets the flip‑flop to one.
Model answer
What a good answer should say
- It provides a timing reference that determines when the output can change.
Explanation
Why this works
Rule: The clock signal acts as a timing reference for edge‑sensitive devices. Substitution: Clock rising edge.
Working: The flip‑flop only samples its data input at the clock edge, so the output changes only at that instant. Answer: The clock sets when the output can change.
Conclusion: The clock controls the timing of state changes in a flip‑flop.
Common mistake
No common mistake is linked to this question yet.