Online Access Free Oracle.1Z0-888.v2021-09-25.q123 Practice Test (Page 24)

Consider the two partial outputs of the SHOW GLOBAL VARIABLES command from a master and slave server:
Master:

Slave:

There is a problem with the slave replicating from the master. Which statement describes the cause of the problem?

A.The shared_memory_base_name variable must match the master.

B.The max_connections variable on the slave needs to be increased.

C.The version of the slave is newer that the version of the master.

D.server_id is not unique.

E.The log_bin variable is set to OFF on the slave.

Consider the key buffer in a MySQL server. Which two statements are true about this feature? (Choose two.)

A.It caches index blocks for InnoDB tables only.

B.It is set on a per-connection basis.

C.It caches index blocks for all storage engine tables.

D.It is a global buffer.

E.It caches index blocks for MyISAM tables only.

How does the InnoDB storage engine handle deadlocks when they are detected?

A.The innodb_locks_unsafe_for_binlog setting determines which transaction is rolled back.

B.The affected transactions wait for innodb_lock_wait_timeout seconds, and then roll back.

C.The transaction isolation level determines which transaction is rolled back.

D.One of the affected transactions will be rolled back, the other is allowed to proceed.

E.Both the affected transactions will be rolled back.

What is the best method for monitoring Group Replication conflict resolution?

A.the PERFORMANCE_SCHEMAtables

B.the SHOW PROCESSLISTcommand

C.the INNODBLock Monitor details

D.the SHOW STATUScommand

E.the INFORMATION_SCHEMAtables

Exhibit:

What does the possible_keys column in this output denote?

A.if there are any indexes that may be used to solve this query

B.if it is possible for you to include any indexes in your query

C.whether there are any indexes in your query

D.whether there are any indexes on the tables that you are querying

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