Which of the following is a characteristic of a digital signal?

• A. It is continuous and can take any value
• B. It is made up of discrete values
• C. It is purely analog in nature
• D. It cannot be used for data transmission

Answer: (B)

A digital signal is characterized by being made up of discrete values rather than being continuous like an analog signal. Digital signals represent information in binary form, using distinct and separate levels, often represented as 0s and 1s. This distinct separation between values allows for precise representation of information and reduces the effects of noise during transmission.

The option that states digital signals are continuous and can take any value reflects characteristics of analog signals, which can produce a continuous range of values. The claim that digital signals are purely analog in nature contradicts the fundamental definition of digital signals. Lastly, the assertion that digital signals cannot be used for data transmission is inaccurate, as digital signals are primarily used for transmitting data in modern communication systems, including computers, networks, and electronic devices. Thus, the correct understanding of digital signals revolves around their discrete nature, making the identification of option B as the right choice clear.