For a NAND gate, struck-at 1 fault in second input line cannot be detected if

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Q. For a NAND gate, struck-at 1 fault in second input line cannot be detected if

(A) q is 1
(B) q is 0
(C) q changes from 1 to 0
(D) q changes from 0 to 1

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✅ Correct Answer: (B) q is 0

Explanation: in a nand gate, struck-at 1 fault in the second input line cannot be detected if the output q is reset (q=0) prior to applying the test sequence.

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in a nand gate, struck-at 1 fault in the second input line cannot be detected if the output q is reset (q=0) prior to applying the test sequence.

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