What causes a replication master server to delete all the binary log files even if they are still in use?

Solution (By Examveda Team)

This question is about managing binary log files in MySQL, which are crucial for replication. The binary log records all changes made to the database. Here's what each option does:
Option A: RESET MASTER LOGS
This command is specifically designed to delete all existing binary log files. It's usually used when you want to start a new log sequence. This is the correct answer because it directly removes the binary logs, even if they're still needed for replication.
Option B: FLUSH TABLES
This command flushes all the data from the tables' internal memory to disk, but it doesn't affect the binary log files.
Option C: RELOAD
This command reloads the grant tables, essentially refreshing the permissions information. It doesn't touch the binary log files.
Option D: FLUSH LOGS
This command forces the binary log to be written to disk, but it doesn't delete any existing files.
Therefore, the correct answer is Option A: RESET MASTER LOGS.
This command is the only one that directly deletes all binary log files, regardless of whether they're currently in use.