How can a user see the functions of the SHIFT and INTERLOCK keys?

The correct choice is related to the functionality of the ASSIST key, which is typically designed to provide users with guidance or information about the functions of other keys on a keyboard or control panel, such as SHIFT and INTERLOCK. When a user presses the ASSIST key, it can display a help screen or a summary of the available functions associated with these keys. This allows users to quickly understand what each key does without having to reference a manual or external documentation.

In contrast, pressing only the SHIFT key does not provide any information about its own function or that of the INTERLOCK key; instead, it only activates its primary function, which usually modifies other keystrokes. Similarly, the DELETE and MODIFY keys do not have functionalities designed to provide assistance or explanations about the SHIFT and INTERLOCK keys. They serve their specific purposes related to data manipulation, such as removing or changing input rather than aiding in navigation or understanding keyboard functions.