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Oracle MySQL 8.0 Database Administrator Sample Questions (Q133-Q138):

NEW QUESTION # 133
You are using an existing server with a new configuration. MySQL Server fails to start.
Examine this snapshot of the error log:

Which action would allow the server to start?

A. Execute mysqladmin flush-logs.
B. Remove ib_logfile0 and ib_logfile1 files from the file system.
C. Create a new ib_logfile0 file of size 26214400.
D. First run mysqld --initialize to refresh the Size of ib_logfile.

Answer: D

NEW QUESTION # 134
Which two are true about binary logs used in asynchronous replication? (Choose two.)

A. They are pulled from the master to the slave.
B. They contain events that describe database changes on the master.
C. They contain events that describe only administrative commands run on the master.
D. They are pushed from the master to the slave.
E. They contain events that describe all queries run on the master.

Answer: B,D

NEW QUESTION # 135
You reconfigure and start a slave that was not replicating for several days.
The configuration file and CHANGE MASTER command are correct. Examine the GTID information from both master and slave:

Which statement is true?

A. Replication will fail because the master does not have the required transaction with bbbbbbbb-bbbb- bbbb-bbbb-bbbbbbbbbbbb GTIDs in its binary logs.
B. Replication will work.
C. Replication will fail because of inconsistent numbers in cccccccc-cccc-cccc-cccc-cccccccccccc GTIDs.
D. Replication will fail because the master has already purged transactions with cccccccc-cccc-cccc- cccc-cccccccccccc GTIDs.
E. Replication will fail because the slave has purged more aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa transactions than the master.

Answer: E

NEW QUESTION # 136
An attempt to recover an InnoDB Cluster fails.
Examine this set of messages and responses:
host3:3377 ssl JS > dba.rebootClusterFromCompleteOutage() Reconfiguring the default cluster from complete outage...
The instance 'host1:3377'' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y The instance 'host2:3377' was part of the cluster configuration. Would you like to rejoin it to the cluster? [y/N]: y Dba.rebootClusterFromCompleteOutage: The active session instance isn't the most updated in comparison with the ONLINE instances of the Cluster's metadat a. Please use the most up to date instance: 'host1:3377'. (RuntimeError) Which statement is true?

A. The active session instance is invalid and must be re-created by using the command shell.connect ('host3:3377').
B. The instance deployed on host3 must be synchronized from a donor deployed on host1 by using the command cluster.addInstance('host1:3377').
C. The cluster is running and there is at least one ONLINE instance.
D. It is possible to determine the most up-to-date instance by comparing different global transaction identifier (GTID) sets with GTID_SUBSET(set1,set2).
E. The instance deployed on host3 must be rebuilt with a backup from the primary instance.

Answer: B

NEW QUESTION # 137
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; execute CHANGE MASTER to adjust the replication relay log file name, then issue start SLAVE;
B. The slave needs to be restored from backup.
C. The slave relay logs should be deleted; then execute START SLAVE;
D. The relay logs from the master should be used to replace the corrupted relay logs.

Answer: D

NEW QUESTION # 138
......

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Oracle MySQL 8.0 Database Administrator Sample Questions (Q133-Q138):

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