Q.

A NOT gate can be implemented by:

A. a single diode
B. two diodes
C. a single resistor
D. a single transistor
Answer» D. a single transistor
Explanation: In digital logic, an inverter or NOT gate is a logic gate which implements logical negation. An inverter circuit outputs a voltage representing the opposite logic-level to its input. Inverters can be constructed using a single NMOS transistor or a single PMOS transistor coupled with a resistor.
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