Cambridge O Level Computer Science · Syllabus 2210 · Boolean Logic
Logic Gate
What is Logic Gate?
An electronic building block that takes one or two binary inputs and produces a single binary output determined by a fixed rule; the syllabus covers NOT, AND, OR, NAND, NOR and XOR (also called EOR), each drawn with its own standard symbol.
This definition is part of the Boolean Logic chapter in Cambridge O Level Computer Science.
Logic Gate in context
The syllabus prints the six logic gate symbols in section 4, Details of the assessment, and requires that those are the symbols used when drawing logic circuits. They are the distinctive-shape symbols — each gate has its own outline, so a gate can be identified from its shape alone. Learn these six shapes exactly; there is no partial credit for a symbol that could be read as a different gate.