Ham Radio General Class Practice Test

Which best describes the function of a two-input AND gate?

1. Output is high when either or both inputs are low

2. Output is high only when both inputs are high

3. Output is low when either or both inputs are high

4. Output is low only when both inputs are high

The correct answer is: Output is high only when both inputs are high

A two-input AND gate is a fundamental digital logic gate that performs a specific logical operation. Its primary function is to output a high signal (logical 1) only when both of its inputs are high (logical 1). This behavior reflects the basic definition of the AND operation in Boolean algebra, where the result is true only if all conditions (in this case, inputs) are true. When either of the inputs is low (logical 0), the output of the AND gate will also be low (logical 0). This characteristic ensures that the gate functions correctly in digital circuits, where the presence of both inputs being high is required to trigger a high output. This principle is widely utilized in various electronic applications, such as in digital signal processing and computational logic. Understanding this function is crucial for designing and troubleshooting circuits, as it informs how different logic gates work together to perform complex operations. Each type of gate, including the AND gate, has specific behaviors that define how circuits respond under various conditions.