Exam-style question
Try this first
Explain the difference between sequential logic and combinational logic, and give an example of a circuit that uses each type.
Model answer
What a good answer should say
- Sequential logic uses memory elements such as flip‑flops, so its output depends on past inputs and the current state.
- Combinational logic has no memory; its output depends only on the present input signals.
- The key difference is the presence of storage elements.
- A D flip‑flop is an example of sequential logic, while a NAND gate is an example of combinational logic.
Explanation
Why this works
The answer defines both concepts, identifies the key difference (memory), explains when each applies, and gives concrete examples, satisfying the compare pattern. It tests the learner’s ability to distinguish the two types and to recognise examples.
Common mistake
No common mistake is linked to this question yet.