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MySQL 5.6 Database Administrator
Question No: 21
A general purpose MySQL instance is configured with the following options:
– log-slow-queries
– long-query-time=,0001
– log-slow-admin-queries
– general-log
– log-bin
– binlog-format=STATEMENT
– innodb-flush-log-at-trx-commit=1 Which three statements are true?
-
The General Query Log records more data than the Binary Log.
-
The binary Log records more data than the General Query Log.
-
The Slow Query Log records more data than the General Query Log.
-
The General Query Log records more data than the Slow Query Log.
-
The Slow Query Log records more data than the Binary Log.
-
The Binary Log records more data than the Slow Query Log.
Answer: A,D,E
Question No: 22
Identify a performance impact when using the Performance Schema.
-
There is no impact on performance.
-
There is an overhead for querying the Performance Schema but not for having it enabled.
-
There is a constant overhead regardless of settings and workload.
-
The overhead depends on the settings of the Performance Schema.
Answer: D
Question No: 23
Which High Availability solution can provide a consistent, time-delayed (for example, one hour) snapshot of the live production database?
-
MySQL Replication
-
Distributed Replication Block Device
-
Windows Server Failover Clustering
-
MySQL Cluster
Answer: A
Question No: 24
Which two events will cause a slave server to create a new relay log file?
-
Starting of the I/O thread
-
Execution of the FLUSH LOGS statement
-
Starting of the SQL thread
-
Reaching the slave_pendign _jobs_size_max limit
-
Execution of FULSH TABLES WITH READ LOCK
Answer: A,B
Reference: http://dev.mysql.com/doc/refman/5.1/en/slave-logs-relaylog.html
Question No: 25
You adjust a default configuration to the following /etc/my.cnf on a Linux installation:
[mysqld] Loq-bin
Binrylog_format=ROW
You do not notice the spelling error in binrylog_format and restart your production server.
How does the MySQL server behave with incorrectly spelled options?
-
Mysqld uses internal configuration versioning and reverts to the previous configuration.
-
When using mysql_config_editor for configuration adjustments, it detects incorrect syntax and typing mistakes.
-
The mysqld_safe script skips the unknown variable and starts using the remaining configuration changes.
-
Mysqld prints to the error log about an unknown variable, and then exits.
Answer: D
Question No: 26
You want a record of all queries that are not using indexes. How would you achieve this?
-
By enabling the Slow Query Log because all queries that are not using indexes will be logged automatically
-
By enabling the Error Log because not using indexes is an error
-
By enabling the Slow Query Log and using the – log-queries-not-using-indexes option
-
By enabling the Error Log and using the – log-queries-not-using-indexes option
Answer: C
Reference: http://dev.mysql.com/doc/refman/5.0/en/slow-query-log.html
Question No: 27
The validate_password plugin is loaded and displays the following settings in global variables:
Mysqlgt; SHOW VARIABLES LIKE ‘validate_password%’;
When attempting to set your password, you get the following error:
Mysqlgt; SET PASSWORD = PASSWORD (‘Hoverl@%’);
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements What is the cause of the error?
-
The password is eight characters long, but needs to exceed validate_password_length to be valid.
-
All of the MEDIUM password policy requirements have not been honored.
-
The password matches a substring Hover as a dictionary word.
-
The password does not match the validate_passoword_number_count requirement.
-
There is no dictionary file defined, so password validation cannot work as expected.
Answer: B
Question No: 28
What are three methods to reduce Mysql server exposure to remote connections?
-
Setting – skip-networking when remote connections are not required
-
Using the sql_mode=STRICT_SECURE after connections are established for encrypted communications
-
Setting specific GRANT privilege to limit remote authentication
-
Setting – mysql_secure_configuration to enable paranoid mode
-
Using SSL when transporting data over remote networks
Answer: A,B,C
Question No: 29
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?
-
The command prints all parameters for the login-path. The password is printed in plain text.
-
The command prints all parameters for the login-path. The password is shown only when you provide the -password option.
-
The command prints all parameter for the login-path. The password is replaced with stars.
-
The command prints the encrypted entry for the login-path. The is only possible to see if an entry exists.
Answer: C
Question No: 30
Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?
-
Mysqlslow
-
Mysqldumpslow
-
Mysqlshow
-
Mysqldump
-
Mysqlaccess
Answer: B
Reference: http://dev.mysql.com/doc/refman/5.0/en/mysqldumpslow.html
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