In VI, what symbol is used to search the entire file?

In VI, to search the entire file, the correct symbol is the forward slash (/). When you initiate a search with this symbol, it prompts you to input the text you want to find, and then it searches through the entirety of the file for that text. This functionality is essential for navigating and editing large files efficiently, as it allows users to quickly locate specific information without having to scroll through the entire document.

The other options serve different purposes: the question mark (?) is used to search in reverse direction, while the percentage symbol (%) is often used to represent the current file name or is related to other commands, but not for searching. The hash symbol (#) is generally not associated with search functionality in VI.