Exam-style question
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What is the purpose of a clock signal in a sequential logic circuit?.
Model answer
What a good answer should say
- The clock signal provides a regular timing reference that synchronises the operation of all sequential elements.
- It ensures that state changes occur only at defined moments, preventing race conditions and guaranteeing predictable data flow.
- Without a clock, the circuit would behave unpredictably, as inputs could change at any time.
Explanation
Why this works
The answer demonstrates a clear understanding of the clock as a synchronising mechanism, highlighting its role in preventing race conditions and ensuring deterministic behaviour. It tests the candidate’s grasp of the fundamental timing requirement in sequential logic.
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