What is a truth table?

A truth table is fundamentally a structured representation that outlines all possible combinations of inputs for a digital circuit and the corresponding outputs that these inputs produce. It systematically details every possible scenario, allowing engineers and designers to understand how the circuit will behave under various conditions.

For each combination of inputs, the corresponding output is displayed, making it an essential tool in digital electronics for verifying the logical functionality of circuits. This information is crucial for both designing digital systems and analyzing their performance. By employing a truth table, one can easily derive logical expressions and ensure that the circuit behaves as expected under all potential input configurations.

In contrast, the other options focus on different aspects of circuit analysis or design, such as diagrams, voltage calculations, or failure records, which do not pertain to the fundamental purpose of a truth table.