A circuit that produces a logic "0" at its output if any or all inputs are logic "1". A NOR gate acts like a strict rule where the output stays at logic "1" (high) only when every single input is "0" (low).

Advanced Qualification · A-002 Advanced components and circuits · A-002-010-003

What is a NOR gate?

AA circuit that produces a logic "0" at its output only if all inputs are logic "0"
BA circuit that produces a logic "1" at its output only if all inputs are logic "1"
CA circuit that produces a logic "1" at its output if some but not all of its inputs are logic "1"
DA circuit that produces a logic "0" at its output if any or all inputs are logic "1"

Correct answer: D — A circuit that produces a logic "0" at its output if any or all inputs are logic "1". From the official ISED question bank, verified word for word.

Why

A NOR gate acts like a strict rule where the output stays at logic "1" (high) only when every single input is "0" (low). The full explanation — and one for every question — is in Pro.

Practise this section

Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.

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