What is the primary function of a digital to analog converter (DAC)?

A) To convert digital signals into frequency components

B) To convert digital signals back to analog form

C) To amplify digital signals

D) To filter analog signals

Answer: B) To convert digital signals back to analog form

Explanation: A DAC converts digital signals, which are discrete, back into analog signals, which are continuous. This is essential in applications like audio playback, where digital data needs to be converted to an analog signal to drive speakers.