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Q21. ROW-based replication has stopped working. You investigate the error log file and find the following entries:
2013-08-27 14:15:47 9056 [ERROR] Slave SQL: Could not execute Delete_rows event on table test.t1; Canât find record in ât1â, Error_code: 1032; handler error
HA_ERR_KEY_NOT_FOUND; the eventâs master log 56_master-bin. 000003, end_log_pos 851, Error_code: 1032
2013-08-27 14:15:47 9056 [warning] Slave: Canât find record in ât1â Error_code: 1032
2013-08-27 14:15:47 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with âSLAVE STARTâ. We stopped at log â56_master-bin. 000003â position 684
Why did you receive this error?
A. The slave SQL thread does not have DELETE privileges to execute on test.t1 table.s
B. The table definition on the slave -litters from the master.
C. Multi-threaded replication slaves can have temporary errors occurring for cross database updates.
D. The slave SQL thread attempted to remove a row from the test.t1 table, but the row did not exist.
Q22. A Mysql Server has been running an existing application successfully for six months.
The my.cnf is adjusted to contain the following additional configuration:
The Mysql Server is restarted without error.
What effect will the new configuration have in existing accounts?
A. They will have their passwords updated on start-up to sha256_password format.
B. They will have to change their password the next time they login to the server.
C. They are not affected by this configuration change.
D. They all connect via the secure sha256_password algorithm without any configuration change.
Q23. Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master-slave replication.
Which two statements are correct?
A. Both technologies use the TCP/IP stack as their primary transmission medium.
B. DRBD uses shared-disk technology.
C. Both technologies guarantee an identical copy of data on the secondary node.
D. Only MySQL can maintain a time-delayed copy of data on the secondary node.
Q24. You examine the output of SHOW GLOBAL STATUS and notice that the value of Created_tmp_disk_tables is consistently increasing.
Which two variables would likely fix this issue?
Q25. Which two capabilities are granted with the SUPER privilege?
A. Allowing a client to kill other client connections
B. Allowing a client to shut down the server
C. Allowing change of the server runtime configuration
D. Allowing client accounts to take over the account of another user
Q26. The âallplicationdbâ is using innoDB and consuming a large amount of file system space. You have a /backup partition available on NFS where backups are stored.
You investigate and gather the following information:
[mysqld] Datadir=/var/lib/mysql/ Innodb_file_per_table=0
Three tables are stored in the innoDB shared tablespace and the details are as follows:
The table data_current has 1,000,000 rows.
The table data_reports has 1,500,000 rows.
The table data_archive has 4,500,000 rows. Shell> is -1 /var/lib/mysql/ -rw-rw—- 1 mysql mysql 744G Aug 26 14:34 ibdata1 -rw-rw—- 1 mysql mysql 480M Aug 26 14:34 ib_logfile0 -rw-rw—- 1 mysql mysql 480M Aug 26 14:34 ib_logfile1 â¦
You attempt to free space from ibdata1 by taking a mysqldump of the data_archive table and storting it on your backup partition.
Shell> mysqldump â u root â p applicationdb data_archive > /backup/data_archive.sql Mysql> DROP TABLE data_archive;
Which set of actions will allow you to free disk space back to the file system?
A. Execute OPTIMIZE TABLE so that the InnoDB engine frees unused pages on disk back
to the file system:
Mysql> OPTIMIZE TABLE data_current, data_reports;
B. Set the server to use its own tablespace, and then alter the table so that data is moved
from the shared tablespace to its own:
Mysql> SET GLOBAL innodb_file_per_table=1;
Mysql> ALTER TABLE data_current ENGINE=InnoDB;
Mysql> ALTER TABLE data_repors ENGINE=InnoDB;
C. Take a backup, stop the server, remove the data files, and restore the backup:
Shell> mysqldump â u root âp applicationdb / > /backup/applicationdb.sql
Shell> /etc/init.d/mysql stop
Shell> cd /var/lib/mysql/
Shell> rm ibdata1 ib_logfile0 ib_logfile1
Shell> /etc/init.d/mysql start
Shell> mysql â u root â p applicationdb < /backup/applicationdb.sql
D. Enable compression on the table, causing InnoDB to release unused pages on disk to
the file system:
Mysql> SET GLOBLE innodb_file_per_table=1;
Mysql> SET GLOBLE innodb_file_format=Barramcuda;
Mysql> ALTER TABLE data_current ROW_FORMAT=COMPRESSED
Mysql> ALTER TABLE data_history ROW_FORMAT=COMPRESSED
Q27. Consider the events_% tables in performance Schema.
Which two methods will clear or reset the collected events in the tables?
A. Using DELETE statements, for example, DELETE FROM performance_schema.events_watis_current;
B. Using the statement RESET PERFORMANCE CACHE;
C. Using the statement FLUSH PERFORMANCE CACHE;
D. Using TRUNCATE statements, for example, TRUNATE TABLE performance_schema.events_waits_current;
E. Disabling and re-enabling all instruments
F. Restarting Mysql
Q28. In a design situation, there are multiple character sets that can properly encode your data. Which three should influence your choice of character set?
A. Disk usage when storing data
B. Syntax when writing queries involving JOINS
C. Comparing the encoded data with similar columns on other tables
D. Memory usage when working with the data
E. Character set mapping index hash size
Q29. What are three actions performed by the mysql_secure_installation tool?
A. It prompts you to set the root user account password.
B. It checks whether file permissions are appropriate within datadir.
C. It asks to remove the test database, which is generated at installation time.
D. It can delete any anonymous accounts.
E. It verifies that all users are configuration with the longer password hash.
Q30. You inherit a legacy database system when the previous DBA, Bob, leaves the company. You are notified that users are getting the following error:
mysql> CALL film_in_stock (40, 2, @count);
ERROR 1449 (HY000): The user specified as a definer (âbonâ@âlocalhostâ) does not exist
How would you identify all stored procedures that pose the same problem?
A. Execute SELECT * FROM mysql.routines WHERE DEFINER=âbob@localhostâ;.
B. Execute SHOW ROUTINES WHERE DEFINER=âbob@localhostâ.
C. Execute SELECT * FROM INFORMATION_SCHEMA. ROUTINES WHERE DEFINER=âbob@localhostâ;.
D. Execute SELECT * FROM INFORMATION_SCHEMA. PROCESSLIST WHERE USER=âbobâ and HOST=â localhostâ;.
E. Examine the Mysql error log for other ERROR 1449 messages.