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Total 392 Questions | Updated On: Mar 01, 2021

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Question 1

Your MySQL environment has asynchronous position based-replication with one master and one slave.

The slave instance had a disk I/O problem, so it was stopped.

You determined that the slave relay log files were corrupted and unusable, but no other files are damaged.

You restart MySQL Server.

How can replication be restored?

A : The slave relay logs should be deleted; then execute START SLAVE;

B : The relay logs from the master should be used to replace the corrupted relay logs.

C : The slave relay logs should be deleted; execute CHANGE MASTER to adjust the replication relay log file name, then issue start SLAVE;

D : The slave needs to be restored from backup.

Answer: B

Question 2

Consider the three binary log files bin.00010, bin.00011, and bin.00012 from which you want to restore data.

Which method would use mysqlbinlog for greater consistency?

A : shell> mysqlbinlog bin.00010 | mysql shell> mysqlbinlog bin.00011 | mysql shell> mysqlbinlog bin.00012 | mysql

B : shell> mysqlbinlog bin.00010 bin.00011 bin.00012 | mysql

C : shell> mysqlbinlog – restore bin.00010 bin.00011 bin.00012

D : shell> mysqlbinlog – include-gtide=ALL bin.00010 bin.00011 bin.00012 | mysql

Answer: B

Question 3

You want to create a temporary table named OLD_INVENTORY in the OLD_INVENTORY database on the master server. This table is not to be replicated to the slave server.

Which two changes would ensure that the temporary table does not propagate to the slave? (Choose two.)

A : Set binlog_format=MIXED with the –replicate-ignore-temp-table option.

B : Use the –replicate-do-db, –replicate-do-table, or –replicate-wild-do-table option with the value equal to OLD_INVENTORY.

C : Change the binlog_format option to ROW and restart mysqld before you create the OLD_INVENTORY table.

D : Stop SQL_THREAD on the slave until you have finished using the OLD_INVENTORY temporary table.

E : Use the –replicate-ignore-table option with the value equal to OLD_INVENTORY.OLD_INVENTORY and restart mysqld before creating the temporary table.

Answer: A,C

Question 4

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?

A : Mysqld uses internal configuration versioning and reverts to the previous configuration.

B : When using mysql_config_editor for configuration adjustments, it detects incorrect syntax and typing mistakes.

C : The mysqld_safe script skips the unknown variable and starts using the remaining configuration changes.

D : Mysqld prints to the error log about an unknown variable, and then exits.

Answer: D

Question 5

A MySQL replication master is set up by using global reansaction identifiers(GTIDs). You execute this statement:

mysql> CREATE TABLE datatarget SELECT * FROM datasource;

ERROR 1786 (HY000): CREATE TABLE ... SELECT is forbidden when @@GLOBAL.ENFORCE_GTID_CONSISTENCY = 1.

Why is this statment forbiden?

A : GTIDs have detected thar a slave is inconsistent and therefore, disallow upadtes until the problem is resolved.

B : The datasource table is using an older InnoDB tablespace format, which is not compatible with GTIDs.

C : The datasource table is using the MyISAM engine, which is not compatible with GTIDs.

D : The statement cannot be logged in a transactionally safe manner.

Answer: D

Page: 1 / 79

Total 392 Questions | Updated On: Mar 01, 2021

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