Which of the following is a basic digital function?

• A. CLOCK
• B. AND
• C. RESISTOR
• D. CAPACITOR

Answer: (B)

In digital circuits, a basic function is a simple boolean operation that combines inputs to produce a defined output. The AND operation is one of these fundamental gates: its output is high only when both inputs are high; if either input is low, the output is low. This behavior is the essence of how digital logic builds complex conditions, and it follows a straightforward truth table used to design logic networks.

A clock is a timing reference, not a boolean function by itself, used to synchronize operations in sequential circuits. A resistor and a capacitor are passive analog components that shape or store energy in a circuit; they do not perform a binary logic operation.