Free Access Oracle.1Z0-888.v2022-08-02.q167 Practice Test (Page 13)

Question 56

Consider the index information for the dept_emp table in the employee's schema:

Which two conclusions can be made based on the output of the query? (Choose two.)

A.There are three indexes on the table.

B.The values on the emp_no column must be unique.

C.The selectivity of the dept_no column is the best of the indexed columns.

D.There is a redundant index on the dept_no column.

E.The secondary indexes are optimized for unique key look-ups.

F.There is a redundant index on the emp_no column.

Question 57

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

A.Both the affected transactions will be rolled back.

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

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

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

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

Question 58

Suppose you are adding rows to a MyISAM table and the --datadirlocation runs out of disk space.
What will happen when this occurs?

A.The server suspends operations for all storage engines until space becomes available.

B.The server will crash.

C.The server suspends that INSERT operation until space becomes available.

D.An error message will be returned to the client .Server Error: ER_IO

Question 59

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

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

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

D.The applications have the SUPERprivilege, which allows them to update rows.

E.The slave user does not have INSERT, UPDATE, or DELETEpermission and cannot execute the Write_rowsfunction.

Question 60

You have installed MySQL Server for the first time on your system. However, the data directory along with the tables in the mysql system database are missing. Which step do you perform to create the contents of the data directory?

A.Run the create_system_tables.sql file

B.Run the mysql_unpack.sql file

C.Invoke mysqld with the --initialize option.

D.Invoke mysql with the --initialize option.

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Question 56

Question 57

Question 58

Question 59

Question 60

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