Exam-style question
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Which statement correctly contrasts the behavior of a combinational logic circuit with that of a sequential logic circuit?.
- A.Combinational circuits have a clock signal; sequential circuits do not
- B.Sequential circuits produce outputs that are functions of inputs only
- C.Combinational circuits have no memory; sequential circuits have memory
- D.Sequential circuits are always slower than combinational circuits
Model answer
What a good answer should say
- Combinational circuits have no memory; sequential circuits have memory
Explanation
Why this works
Define both: combinational logic has no memory and outputs depend solely on current inputs; sequential logic contains memory and outputs depend on current inputs and stored state. Identify key difference: presence of memory.
Explain when each applies: combinational logic is used for instant logic functions; sequential logic is used where state must be preserved, such as in flip‑flop based circuits. Conclude: the statement that highlights the memory difference correctly distinguishes the two types.
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