Free Access Oracle.1Z0-888.v2022-04-28.q136 Practice Test (Page 8)

Question 31

Which three allocate memory per thread in MySQL?

A.query cache

B.thread cache

C.read buffer

D.internal temporary table

E.sort buffer

F.InnoDB buffer pool instance

Question 32

You have a MySQL replication setup and you intentionally stop the SQL thread on the slave.

What are two reasons that you may stop the SQL thread on the slave while keeping the I/O thread running?

A.to allow the remaining events to be processed on the slave while not receiving new events from the master

B.to allow a backup to be created under reduced load

C.to allow for point-in-time recovery on the slave

D.to prevent any transaction experiencing a deadlock

E.to prevent schema changes from propagating to the slave before they are validated

Question 33

The MySQL error log shows:
InnoDB: Warning: a long semaphore wait:
The relevant parts of the InnoDB monitor output shows:

Which two options would help avoid the long wait in the future? (Choose two.)

A.Deactivate the query cache.

B.Increase the value of the innodb_read_io_threadsoption.

C.Change the table to use HASH indexes instead of BTREE indexes.

D.Increase the size of the InnoDB buffer pool.

E.Increase the value of the innodb_lock_wait_timeoutoption.

F.Set the value of innodb_adaptive_hash_indexto zero.

Question 34

A MySQL replication slave is set up as follows:
* Uses all InnoDB tables
* Receives ROW-based binary logs
* Has the read-only option
The replication slave has been found in an error state.
You check the MySQL error log file and find these entries:

What are two possible causes for this error to occur?

A.The applications have the SUPER privilege, which allows them to update rows.

B.The slave user does not have INSERT, UPDATE, or DELETE permission and cannot execute the Write_rows function.

C.The slave was created with mysqldump -u root -p --skip-lock-tables -all-databases >
/data/datA.sql

D.The root user on the slave has executed FLUSH LOGS, causing the relay-log to doublewrite.

E.For tables with UNIQUE keys, statement-based replication must be used to maintain integrity.

Question 35

A particular government's security policy is to have very strict data encryption and safety settings. This is done by restricting access based on their own CA authority and limiting access to particular users within a department. Which method could be used to restrict access as required?

A.using GRANT ... REQUIRE SSL for a secure connection

B.using GRANT ... REQUIRE X509 AND REQUIRE ISSUER '/C=.....' AND REQUIRE SUBJECT
'/C=...
..'

C.using GRANT USAGE, SSL, .....ON *.* TO user@remotehost IDENTIFIED BY
'secret_password'

D.using GRANT USAGE, X509, .......ON *.* TO user@remotehost IDENTIFIED BY
'secret_password'

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Question 31

Question 32

Question 33

Question 34

Question 35

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