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. NAND Logic Gate
• C. XOR Gate
• D. AND Gate

Answer: (A)

How an OR operation combines multiple inputs to produce a high output whenever any input is high. An OR gate outputs a high signal if at least one input is high; only when all inputs are low does the output stay low. This is exactly the behavior you want when you want the result to trigger if any condition is true, even if others are false. For two inputs, the output is high if either input is high; for more inputs, the output remains high as soon as one input is high. The other gates behave differently: AND requires all inputs high to make a high; NAND is the complement of AND; XOR outputs high only when an odd number of inputs are high, which for two inputs means exactly one is high, not “any.” Therefore, the gate that performs the OR operation on two or more inputs is the OR gate.

How an OR operation combines multiple inputs to produce a high output whenever any input is high. An OR gate outputs a high signal if at least one input is high; only when all inputs are low does the output stay low. This is exactly the behavior you want when you want the result to trigger if any condition is true, even if others are false. For two inputs, the output is high if either input is high; for more inputs, the output remains high as soon as one input is high. The other gates behave differently: AND requires all inputs high to make a high; NAND is the complement of AND; XOR outputs high only when an odd number of inputs are high, which for two inputs means exactly one is high, not “any.” Therefore, the gate that performs the OR operation on two or more inputs is the OR gate.