How many NOR gates are used to get AND gate from them?
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Correct answer: (B) 3
Explanation
NOR-ing each input with itself gives A' and B' (2 gates). A third NOR gives (A' + B')' = AB. So 3 NOR gates are needed.
From DSSSB TGT Computer Science PYQ (Technical), 1 Aug 2021, Shift 3
This is question 28 of DSSSB TGT Computer Science PYQ (Technical), 1 Aug 2021, Shift 3. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.