Which character set variable indicates the character set used for storing identifiers?

Solution (By Examveda Team)

This question is about how MySQL stores the names of things like tables and columns. It's asking which variable tells us what character set is used for these names.
Let's break down the options:
Option A: character_set_system - This variable is for the overall system character set, not specifically for identifiers.
Option B: character_set_server - This variable is for the server's default character set, which is used for many things, but not necessarily identifiers.
Option C: collation_server - This variable controls how characters are sorted and compared, but not the character set used for storing identifiers.
Option D: character_set_database - This variable specifies the character set used for storing identifiers within a specific database.
Therefore, the correct answer is Option D: character_set_database. This variable controls the character set for the names of tables, columns, and other database objects within that specific database.