AdvancedA-002-010-001
What is a NAND gate?
D
Answer
Circuit design and power supplies
Type
A
A circuit that produces a logic "0" at its output only when all inputs are logic "0"
B
A circuit that produces a logic "1" at its output only when all inputs are logic "1"
C
A circuit that produces a logic "0" at its output if some but not all of its inputs are logic "1"
D
A circuit that produces a logic "0" at its output only when all inputs are logic "1"
Answer Notes
A NAND gate is a digital logic gate that combines the functions of an AND gate and a NOT gate (inverter). To understand its behavior, first look at an AND gate, which only outputs a logic "1" if all of its inputs are "1".
Because the NAND gate inverts this result, it does the exact opposite: it outputs a logic "0" only when all of its inputs are logic "1". For any other combination of inputs, the NAND gate will output a logic "1".
The distractors describe other basic logic gates. For instance, a circuit that produces a logic "1" only when all inputs are "1" is a standard AND gate, while one that outputs a "0" only when all inputs are "0" represents a standard OR gate.
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