Symlink is an applicable relocation method for . . . . . . . .

Solution (By Examveda Team)

This question asks about symlinks in MySQL. A symlink, or symbolic link, is like a shortcut on your computer. It points to a file or directory, but it doesn't contain the actual data.

Think of it like a map with an arrow pointing to a treasure. The map itself isn't the treasure, it just tells you where to find it. The symlink acts like the map, and the actual data is the treasure.

Now, the question asks which of the following can be relocated using a symlink:

* Option A: entire data directory This is the most common use for symlinks in MySQL. The data directory contains all your databases and their data. Using a symlink, you can relocate this entire directory to a different location, making it easier to manage or move your data.

* Option B: individual database tables Symlinks can't be used to relocate individual tables within a database. Tables are part of the overall database structure, and moving them individually would break the connections.

* Option C: server PID file This file is used by the MySQL server to identify itself. It's not recommended to relocate this file using a symlink. It can cause issues with the server's operation.

* Option D: log files While you can technically use symlinks for log files, it's not a common practice. Log files are usually kept in the data directory, so relocating the entire directory using a symlink covers this as well.

So, the correct answer is Option A: entire data directory.

Remember, symlinks are powerful tools but require careful consideration. Use them wisely to relocate your data efficiently.