Mysql OCP 74题

When you examine a new MySQL installation with default configuration, you find a file called ibdata1 in the database directory. Which two statements are true about this file?
A. it contains the binary log.
B. it contains a general tablespace.
C. it is the default location for all new tables that you create.
D. it contains the system tablespace.
E. it contains the redo log.
F. it contains the undo log.

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MYSQL