Online Access Free Oracle.1Z1-888.v2022-02-09.q146 Practice Test (Page 13)

1Z1-888 Exam Question 56

Which statement best describes the purpose of the InnoDB buffer pool?

A.It is amount of buffers available during a transaction.

B.It caches only the indexes for InnoDB tables.

C.It caches data and indexes for InnoDB tables.

D.It holds changes made during a transaction before they are written to the log.

E.It is a pool of memory for SQL query sort operations from within the InnoDB engine.

1Z1-888 Exam Question 57

Which three allocate memory per thread in MySQL? (Choose three.)

A.query cache

B.thread cache

C.read buffer

D.internal temporary table

E.sort buffer

F.InnoDB buffer pool instance

1Z1-888 Exam Question 58

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.

1Z1-888 Exam Question 59

Examine the mysqldumpslow output:

Which two options could explain the slow query?

A.A table lock is causing delays.

B.There are 108 queries still being executed.

C.A full table scan is being used.

D.No index has been defined on the filtered column.

E.There is network congestion between client and server.

1Z1-888 Exam Question 60

You are using the Performance Schema to investigate replication on a slave which has a single master.
The option slave-parallel-type is set to DATABASE.

Assume that all instruments and consumers are enabled and all threads are instrumented. Which two facts can be concluded from the given output?

A.At most, two schemas are being updates concurrently.

B.The slave is configured with slave_parallel_workers = 4

C.THREAD_ID 21 has stopped running.

D.The server needs more cores to use all slave threads.

E.The slave cannot process the relay log fast enough to use all threads.

F.The salve has two intermediate relay slaves connected to it.

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1Z1-888 Exam Question 56

1Z1-888 Exam Question 57

1Z1-888 Exam Question 58

1Z1-888 Exam Question 59

1Z1-888 Exam Question 60

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