**What is a Logic gate & What are the fundamental logic gates?**

A logic gate is an elementary building block of a digital circuit. Most logic gates have two inputs and one output.

At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels.

At any given moment, every terminal is in one of the two binary conditions low (0) or high (1), represented by different voltage levels.

These gates are the AND, OR, NOT, NAND, NOR, EXOR and EXNOR gates. The basic operations are described below with the aid of truth tables. The OR gate is an electronic circuit that gives a high output (1) if one or more of its inputs are high. A plus (+) is used to show the OR operation.

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