Difficulty: Easy
Correct Answer: Correct
Explanation:
Introduction / Context:
Flip-flops sample synchronous inputs (D, J/K, T with enables) around an active clock transition. Two key timing specs guarantee correct sampling: setup time and hold time. This item checks your understanding of how short hold time supports correct state capture.
Given Data / Assumptions:
Concept / Approach:
If inputs meet setup and hold, the device samples reliably at the active edge and the output transitions to the state commanded by those inputs. Many modern flip-flops specify minimal or even zero hold time thanks to internal clocking schemes, which aligns with the statement’s “generally short enough.”
Step-by-Step Solution:
Verification / Alternative check:
Consult device timing diagrams: the sampling instant is at the active edge, and output changes after t_co (clock-to-output delay) when setup/hold are met.
Why Other Options Are Wrong:
Common Pitfalls:
Ignoring hold time because it is “small”; changing inputs right at the edge; mixing asynchronous set/reset with synchronous data timing.
Final Answer:
Correct
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