Device diagnostics refers to the process of assessing and evaluating the performance and functionality of electronic devices, such as computers, smartphones, and tablets. This process helps identify any issues or malfunctions, allowing users to understand the health of their devices. Common diagnostic tools can check hardware components, software performance, and system settings. During device diagnostics, various tests are conducted to pinpoint problems, such as slow performance or connectivity issues. These tests can include checking the CPU, RAM, and storage for errors, as well as running software updates. By performing diagnostics, users can ensure their devices operate efficiently and effectively.