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MYSQL MySQL 5.0 Database Administrator Certified Professional Exam, Part I Sample Questions:

1. When working with InnoDB, which of the following is true when trying to create foreign key references?

A) Only the child column must be indexed.
B) Both the parent & child columns must be indexed.
C) InnoDB may create an index automatically.
D) Only the parent column must be indexed.
E) InnoDB will not create an index automatically.

2. Which of the following would be the effect of setting REFERENCES with ON UPDATE CASCADE?

A) Records could only be updated and not deleted regardless if they have any corresponding child records.
B) Changes to the parent record would be disallowed if there were any corresponding child records.
C) Changes made to the parent record are passed down to the corresponding child records.

3. The MySQL server host crashes at 10:00 in the morning, and is brought back online at 10:30. In order to ensure that all data are consistent, a copy is first made of the table, tablespace and log files currently on the server host, and these files are then restored from a backup made at 03:00 the same morning. What should be done in order to bring the database to the state it was at just before the server host crashed?

A) The mysql_restore utility should be used to update the server to its last known state.
B) Once the backup files from 03:00 have been restored, there is nothing more that can be done to restore the database files.
C) The procedure described is wrong; instead, the mysqlcheck utility should be used and only if that fails should backup copies be restored.
D) The binary logs recorded after the backup at 03:00 should be re-applied to make the database file consistent with the state just before the crash.

4. Assume you created a backup of the world database by the following statement.
shell> mysqldump --opt world > dump.sql
How can you import the data from this dumped file into the test database?

A) shell> mysqladmin recover test dump.sql
B) mysql> RECOVER test dump.sql;
C) mysql> USE test;mysql> SOURCE dump.sql;
D) shell> mysql test < dump.sql

5. LOCK IN SHARE MODE should be used...

A) When you need a lock that does not allow other transactions to read, update or delete the same data until released.
B) When you need a lock that allows other transactions to read the same data, but not update or delete until released.
C) When you need a lock that allows other transactions to read, update and delete the same locked data.

Solutions: