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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:
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 3:
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 4:
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 5:
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
$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 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
Question 6:
A Mysql Server has been running an existing application successfully for six months.
The my.cnf is adjusted to contain the following additional configuration:
[mysqld]
Default-authentication-plugin=sha256_password
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.
Correct Answer: D
Question 7:
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
Correct Answer: CDE
Question 8:
You are having problems with connections from a specific host (192.168.1.15) not closing down correctly. You want to find the state of the threads from that host check for long-running queries.
Which statement will accomplish this?
A. SELECT * FROM INFORMATION_SCHEMA.PROCESSLIST WHERE HOST=\’192.168.1.15\’;
B. SELECT * FROM INFORMATION_SCHEMA.EVENTS WHERE HOST=\’ 192.168.1.15\’;
C. SELECT * FROM INFORMATION_SCHEMA.STATISTICS WHERE HOST=\’ 192.168.1.15\’;
D. SELECT * FROM INFORMATION_SCHEMA.INNODB_METEICS WHERE HOST=\’ 192.168.1.15\’;
Correct Answer: C
Question 9:
User A issues the command:
LOCK TABLES pets READ;
Which command can User B execute against the pets table?
A. UPDATE pets…
B. SELECT….FROM pets
C. INSERT INTO pets…
D. ALTER TABLE pets…
Correct Answer: B
Question 10:
When backing up a replication slave, which three should also be backed up in addition to data?
A. The master.info and relay.info files
B. The relay log files
C. The relay index file
D. Mysql.slave_master_info table
E. Mysql.slave_relay_log_info table
F. Mysql.slave_worker_info table
Correct Answer: ABE
Question 11:
You want a record of all queries that are not using indexes.
How would you achieve this?
A. By enabling the Slow Query Log because all queries that are not using indexes will be logged automatically
B. By enabling the Error Log because not using indexes is an error
C. By enabling the Slow Query Log and using the log-queries-not-using-indexes option
D. By enabling the Error Log and using the log-queries-not-using-indexes option
Correct Answer: C
Question 12:
The validate_password plugin is loaded and displays the following settings in global variables: Mysql> SHOW VARIABLES LIKE `validate_password%\’;
When attempting to set your password, you get the following error:
Mysql> SET PASSWORD = PASSWORD (`Hoverl@%\’);
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
What is the cause of the error?
A. The password is eight characters long, but needs to exceed validate_password_length to be valid.
B. All of the MEDIUM password policy requirements have not been honored.
C. The password matches a substring Hover as a dictionary word.
D. The password does not match the validate_passoword_number_count requirement.
E. There is no dictionary file defined, so password validation cannot work as expected.
Correct Answer: B
Question 13:
You have been notified that the `apps\’ . `reports\’ table has been accidentally truncated.
You have single file mysqldump backup available taken prior to the truncate. The backup contains all the tables from the instance, and the `apps\’ . `reports\’ table must be restored without affecting the other remaining databases and tables.
Which restore option is suitable in this scenario?
A. Restore the backup to another databases instance and obtain a copy of the reports table individually.
B. Extract the `apps\’ . `reports\’ table from the backup using the SOURCE command.
C. Execute LOAD DATA INFILE `backup.sql\’ SCHEMA=\’apps\’ TABLE= `reports\’
D. Execute mysqldump on the backup,sql file and apply filter arguments to obtain only the `apps\’ . `reportys\’ table.
Correct Answer: B
Question 14:
Which statement is true about using Microsoft Windows Cluster as a platform for Mysql?
A. It is provided by means of IP- level disk replication.
B. It is shared-nothing architecture.
C. It implements High Availability by using the .NET Connector\’s load balancing capabilities.
D. It relies on the shared disk architecture being visible to both servers.
Correct Answer: D
Question 15:
Which High Availability solution can provide a consistent, time-delayed (for example, one hour) snapshot of the live production database?
A. MySQL Replication
B. Distributed Replication Block Device
C. Windows Server Failover Clustering
D. MySQL Cluster
Correct Answer: A
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