Exam-style question
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Which gate is represented by a symbol with a curved surface and a flat output line but with a small circle at the input?.
- A.NAND gate
- B.NOR gate
- C.XOR gate
- D.XNOR gate
Model answer
What a good answer should say
- NAND gate
Explanation
Why this works
Rule: A NAND gate symbol is an AND gate symbol with a small circle at the input. Substitution: Symbol has curved surface, flat output, and a small circle at the input.
Working: The small circle indicates that the output is the inverse of the AND operation. Answer: NAND gate.
Conclusion: This symbol represents a NAND gate.
Common mistake
No common mistake is linked to this question yet.