Advanced Qualification · A-002 Advanced components and circuits · A-002-010-007
What is an AND gate?
- A A circuit that produces a logic "1" at its output if all inputs are logic "0"
- B A circuit that produces a logic "1" at its output only if all its inputs are logic "1"
- C A circuit that produces a logic "1" at the output if at least one input is a logic "0"
- D A circuit that produces a logic "1" at its output only if one of its inputs is logic "1"
Correct answer: B — A circuit that produces a logic "1" at its output only if all its inputs are logic "1". From the official ISED question bank, verified word for word.
Why
An AND gate acts like a strict switch that only turns on, producing a logic "1" output, when every single input is already turned on as a logic "1". The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.