73·STUDY

Extra exam question E7A07

Subelement E7, PRACTICAL CIRCUITS· Group E7A

E7A07

What logical operation does a NAND gate perform?

  • A.It produces a 0 at its output only if all inputs are 0
  • B.It produces a 1 at its output only if all inputs are 1
  • C.It produces a 0 at its output if some but not all inputs are 1
  • D.It produces a 0 at its output only if all inputs are 1 (correct answer)

WhyA NAND gate produces a 0 at its output only if all inputs are 1. A NAND gate outputs a 0 only when every one of its inputs is a 1, the inverted complement of a plain AND gate, answer D. It doesn't output 0 only when all inputs are 0, doesn't require all inputs be 1 to output a 1 (a NAND does the opposite), and doesn't output 0 just because some but not all inputs are 1.

Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.

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