Exam-style question
Try this first
A digital circuit outputs a value that depends only on the current input signals. Is this circuit sequential or combinational? Justify your answer.
Model answer
What a good answer should say
- The circuit is combinational logic because its output is determined solely by the present inputs and it contains no memory elements.
- Sequential logic would require storage elements and a clock to remember past states.
- Therefore, the lack of memory and dependence only on current inputs indicate a combinational circuit.
Explanation
Why this works
The answer defines both types, states the key difference (memory), explains when each applies, and concludes correctly, meeting the compare pattern. It assesses the learner’s ability to apply the definition to a specific scenario.
Common mistake
No common mistake is linked to this question yet.