Which of the following statements best defines a digital system?

A digital system is fundamentally defined by its use of binary representation to convey information. This means that data is expressed in a form consisting of two discrete states, typically represented by the digits 0 and 1. This binary system allows for efficient processing, storage, and transmission of data in various digital devices and computing systems.

By utilizing binary representation, digital systems can perform complex operations, enabling a wide range of functionalities in computing and communication technologies. This encompasses everything from simple calculations to sophisticated algorithms that power modern applications and services. Therefore, this definition aligns precisely with the core aspect of a digital system, highlighting its essential reliance on binary code to operate effectively.

In contrast, other statements describe systems that do not fit into the framework of a digital system. For example, a system that relies on analog communication, paper-based records, or physical presence for validation encompasses characteristics associated with analog systems or traditional record-keeping, rather than the modern digital format which underpins contemporary technology.