Which gate performs the OR operation on two or more inputs?

Which gate performs the OR operation on two or more inputs?

• A. OR Logic Gate
• B. AND Gate
• C. NAND Logic Gate
• D. XOR Gate

Answer: (A)

The OR gate is used when you want the output to go high if any one of its inputs is high. It effectively says “at least one input is true.” For two inputs, the output becomes 1 if either input is 1 (or both are 1); it only stays 0 when all inputs are 0. This behavior naturally extends to two or more inputs: as soon as any input is high, the output is high. This is distinct from the AND gate, which requires all inputs to be high for the output to be high. The NAND gate is the inverse of AND, so it is high unless all inputs are high. The XOR gate outputs a high signal when an odd number of inputs are high (for two inputs that means exactly one is high), which is different from the inclusive OR behavior.

The OR gate is used when you want the output to go high if any one of its inputs is high. It effectively says “at least one input is true.” For two inputs, the output becomes 1 if either input is 1 (or both are 1); it only stays 0 when all inputs are 0. This behavior naturally extends to two or more inputs: as soon as any input is high, the output is high.

This is distinct from the AND gate, which requires all inputs to be high for the output to be high. The NAND gate is the inverse of AND, so it is high unless all inputs are high. The XOR gate outputs a high signal when an odd number of inputs are high (for two inputs that means exactly one is high), which is different from the inclusive OR behavior.