Exam-style question
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Which component uses a clock signal to coordinate state changes?.
- A.AND gate
- B.OR gate
- C.Flip‑flop
- D.Resistor
Model answer
What a good answer should say
- Flip‑flop
Explanation
Why this works
Formula/rule: Flip‑flops are the basic storage elements that require a clock to trigger state changes. Substitution: The clock input of a flip‑flop determines when it latches its data.
Working: When the clock edge occurs, the flip‑flop captures the input and holds it until the next edge. Answer: Flip‑flop.
Units/conclusion: Only sequential elements such as flip‑flops use a clock signal for timing.
Common mistake
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