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Question 1:
A simple master-to-slave replication is currently being used. The following information is extracted from the
SHOW SLAVE STATUS output:
Last_SQL_Error: Error \’Duplicate entry \’8\’ for key \’PRIMARY\’ \’ on query. Default database:
\’mydb\’. Query: \’insert into mytable VALUES (\’8\’ , \’George\’) \’ Skip_Counter: 0
Retrieved _Gtid_Set: 38f32e23480a7-32a1-c323f78067fd37821: 1-8 Auto _Position: 1
You execute a “SHOW CREATE TABLE mytable” on the slave:
CREATE TABLE `mytable\’ (
`ID\’ int(11) NOT NULL DEFAULT `0\’,
`name\’ char(10) DEFAULT NULL,
PRIMARY KEY (`ID\’)
)
The table mytable on the slave contains the following:
You have issued a STOP SLAVE command. One or more statements are required before you can issue a START SLAVE command to resolve the duplicate key error.
Which statement should be used?
A. SET GLOBAL SQL_SKIP_SLAVE_COUNTER=1
B. SET GTID_NEXT=”CONSISTENCY”; BEGIN; COMMIT; SET GTID_NEXT=” AUTOMATIC\’;
C. SET GLOBAL enforce_gtid_consistency=ON
D. SET GTID_EXECUTED=”38f32e23480a7-32a1-c323f78067fd37821 : 9″;
E. SET GTID_NEXT=”38f32e23480a7-32a1-c323f78067fd37821 : 9″; BEGIN; COMMIT; SET GTID_NEXT=”AUTOMATIC”;
Correct Answer: A
Question 2:
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 (`bon\’@\’localhost\’) does not exist
How would you identify all stored procedures that pose the same problem?
A. Execute SELECT * FROM mysql.routines WHERE DEFINER=\’bob@localhost\’;.
B. Execute SHOW ROUTINES WHERE DEFINER=\’bob@localhost\’.
C. Execute SELECT * FROM INFORMATION_SCHEMA. ROUTINES WHERE DEFINER=\’bob@localhost\’;.
D. Execute SELECT * FROM INFORMATION_SCHEMA. PROCESSLIST WHERE USER=\’bob\’ and HOST=\’ localhost\’;.
E. Examine the Mysql error log for other ERROR 1449 messages.
Correct Answer: D
Question 3:
When designing an InnoDB table, identify an advantage of using the BIT datatype Instead of one of the integer datatypes.
A. BIT columns are written by InnoDB at the head of the row, meaning they are always the first to be retrieved.
B. Multiple BIT columns pack tightly into a row, using less space.
C. BIT (8) takes less space than eight TINYINT fields.
D. The BIT columns can be manipulated with the bitwise operators and, |, ~, ^, <>. The other integer types cannot.
Correct Answer: B
Question 4:
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; Can\’t find record in `t1\’, Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event\’s master log 56_master-bin. 000003, end_log_pos 851, Error_code: 1032 2013-08-27 14:15:47 9056 [warning] Slave: Can\’t find record in `t1\’ 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 “SLAVE START”. We stopped at log `56_master- bin. 000003\’ 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.
Correct Answer: D
Question 5:
Mysqldump was used to create a single schema backup; Shell> mysqldump u root p sakila > sakila2013.sql
Which two commands will restore the sakila database without interfering with other running database?
A. Mysql> USE sakila; LOAD DATA INFILE `sakila2013.sql\’;
B. Shell> mysql u root p sakila sakila2013.sql
C. Shell> mysql import u root p sakila sakila2013.sql
D. Shell> mysql u root -p e `use sakila; source sakila2013.sql\’
E. Shell> mysql u root p silent < sakila2013.sql
Correct Answer: BC
Question 6:
Consider the Mysql Enterprise Audit plugin.
You are checking user accounts and attempt the following query:
Mysql> SELECT user, host, plugin FROM mysql.users; ERROR 1146 (42S02): Table `mysql.users\’ doesn\’t exist
Which subset of event attributes would indicate this error in the audit.log file?
A. NAME=”Query” STATUS=”1146″ SQLTEXT=”select user,host from users”/>
B. NAME=”Error” STATUS=”1146″ SQLTEXT=”Error 1146 (42S02): Table `mysql.users\’ doesn\’t exist”/>
C. NAME=”Query” STATUS=”1146″ SQLTEXT=” Error 1146 (42S02): Table `mysql.users\’ doesn\’t exist”/>
D. NAME=”Error” STATUS=”1146″ SQLTEXT=”select user,host from users”/>
E. NAME=”Error” STATUS=”0″ SQLTEXT=”Error 1146 (42S02): Table `mysql.users\’ doesn\’t exist”/>
Correct Answer: C
Question 7:
Which query would you use to find connections that are in the same state for longer than 180 seconds?
A. SHOW FULL PROCESSLIST WHEER Time > 180;
B. SELECT * FROM INFORMATION_SCHEMA.EVENTS SHERE STARTS < (DATE_SUB (NOW ( ), INTERVAL 180 SECOND) );
C. SELECT * FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE STATE < (DATE_SUB (NOW ( ), INTERVAL 180 SECOND) );
D. SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE TIME > 180;
Correct Answer: A
Question 8:
A database exists as a read-intensive server that is operating with query_cachek_type = DEMAND.
The database is refreshed periodically, but the resultset size of the queries does not fluctuate.
Note the following details about this environment:
A web application uses a limited set of queries.
The Query Cache hit rate is high.
All resultsets fit into the Query Cache.
All queries are configured to use the Query Cache successfully.
The response times for queries have recently started to increase. The cause for this has correctly been identified as the increase in the number of concurrent users accessing the web service.
Based solely on the information provided, what is the most likely cause for this slowdown at the database level?
A. The Query Cache is pruning queries due to an increased number of requests.
B. Query_cache_min_res_unit has been exceeded, leading to an increased performance overhead due to additional memory block lookups.
C. Mutex contention on the Query Cache is forcing the queries to take longer due to its single- threaded nature.
D. The average resultset of a query is increasing due to an increase in the number of users requiring SQL statement execution.
Correct Answer: C
Question 9:
You have a login-path named “adamlocal” that was created by using the mysql_config_editor command.
You need to check what is defined for this login_path to ensure that it is correct for you deployment.
You execute this command:
$ mysql_config_editor print login-path=adamlocal
What is the expected output of this command?
A. The command prints all parameters for the login-path. The password is printed in plain text.
B. The command prints all parameters for the login-path. The password is shown only when you provide the password option.
C. The command prints all parameter for the login-path. The password is replaced with stars.
D. The command prints the encrypted entry for the login-path. The is only possible to see if an entry exists.
Correct Answer: C
Question 10:
You are using replication and the binary log files on your master server consume a lot of disk space. Which two steps should you perform to safely remove some of the older binary log files?
A. Ensure that none of the attached slaves are using any of the binary logs you want to delete.
B. Use the command PURGE BINARY LOGS and specify a binary log file name or a date and time to remove unused files.
C. Execute the PURGE BINARY LOGE NOT USED command.
D. Remove all of the binary log files that have a modification date earlier than today.
E. Edit the .index file to remove the files you want to delete.
Correct Answer: BD
Question 11:
Which two statements are true about InnoDB auto-increment locking?
A. The auto-increment lock can be a table-level lock.
B. InnoDB never uses table-level locks.
C. Some settings for innodb_autoinc_lock_mode can help reduce locking.
D. InnoDB always protects auto-increment updates with a table-level lock.
E. InnoDB does not use locks to enforce auto-increment uniqueness.
Correct Answer: AD
Question 12:
You execute the following statement in a Microsoft Windows environment. There are no conflicts in the path name definitions.
C:
\> mysqld install Mysql56 defaults file = C : \my opts.cnf What is the expected outcome?
A.
Mysqld acts as an MSI installer and installs the Mysql 5.6 version, with the c: \my-opts.cnf configuration file.
B.
Mysql is installed as the Windows service name Mysql56, and uses c: \my-opts.cnf as the configuration file
C.
An error message is issued because install is not a valid option for mysqld.
D.
A running Mysql 5.6 installation has its runtime configuration updated with the server variables set in c: \my-opts.cnf.
Correct Answer: B
Question 13:
What are four capabilities of the mysql client program?
A. Creating and dropping databases
B. Creating, dropping, and modifying tables and indexes
C. Shutting down the server by using the SHUTDOWN command
D. Creating and administering users
E. Displaying replication status information
F. Initiating a binary backup of the database by using the START BACKUP command
Correct Answer: BDEF
Question 14:
Assume that you want to know which Mysql Server options were set to custom values. Which two methods would you use to find out?
A. Check the configuration files in the order in which they are read by the Mysql Server and compare them with default values.
B. Check the command-line options provided for the Mysql Server and compare them with default values.
C. Check the output of SHOW GLOBAL VARIABLES and compare it with default values.
D. Query the INFORMATION_SCHEMA.GLOBAL_VARIABLES table and compare the result with default values.
Correct Answer: CD
Question 15:
You install a copy of Mysql 5.6.13 on a brand new Linux server by using RPM packages. The server starts
successfully as verified by the following commands:
$ pidof mysqld
3132
$tail – n2 /var/lib.mysql/hostname.err
2013-08-18 08:18:38 3132 [Note] /usr/sbin/mysqld: ready for connections.
Version: ‘5.6.13-enterprise-commercial-advaced’ socket: ‘/tmp/mysql.sock’ port;
3306 Mysql Enterprise Server – Advanced Edition (Commercial)
You attempt to log in as the root user with the following command:
$mysql –u root
ERROR 1045 (28000): Access denied for user ‘root’@’localhost’ (using password: NO)
Which statement is true about this scenario?
A. The RPM installation script sets a default password of password for new installations.
B. The local root user must log in with a blank password initially: mysql u root p.
C. New security measures mean that the mysql_secure_installation script must be run first on all new installations.
D. The mysql_install_bd post-installation script used random-password.
Correct Answer: B