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Oracle 1z0-084 Exam With Confidence Using Practice Dumps

Exam Code:
1z0-084
Exam Name:
Oracle Database 19c: Performance Management and Tuning
Certification:
Vendor:
Questions:
55
Last Updated:
Jul 10, 2025
Exam Status:
Stable
Oracle 1z0-084

1z0-084: Oracle Certification Exam 2025 Study Guide Pdf and Test Engine

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Oracle Database 19c: Performance Management and Tuning Questions and Answers

Question 1

A database supporting a mixed workload is hosted on a server with 64 CPUs.

A large number of free buffer waits and buffer busy waits occur affecting performance.

The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.

Examine these parameter settings:

Which two actions can help reduce the number of these waits7

Options:

A.

increasing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 128

B.

Increasing the size of MEMORYTARGET

C.

setting dbwr_io_slaves to 64

D.

increasing the value of DBWRITERPROCESSES to 64,

E.

reducing the values of DB_FILE_MULTILOCK_READ_COUNT to 64

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Question 2

Examine this statement and output:

Which three statements are true?

Options:

A.

Both 9822 and 8779 sessions are waiting for operating system resources.

B.

Session 8779 may be waiting due to a network problem.

C.

Session 9857 waited 1354 seconds for another process, which was also waiting for a transaction to end.

D.

Session 9857 is not waiting.

E.

Session 8779 may be waiting for a user or application response.

F.

Session 9822 will always stop waiting if the session that owns the TX enqueue issues a COMMIT statement as session 9822 is the first session in the transaction queue.

Question 3

Which two statements are true about space usage in temporary tablespaces?

Options:

A.

When a global temporary table instantiation is too large to fit in memory, space is allocated in a temporary tablespace.

B.

Temporary tablespaces setting Includes quotas to limit temporary space used by a session for that Temporary tablespace.

C.

A sort will fail if a sort to disk requires more disk space and no additional extent can be found/allocated in/for the sort segment.

D.

When a session consumes all temporary tablespace storage, then the session would hang until the temporary space used by that session is cleared.

E.

Lack of temporary tablespace space for sort operations can be prevented by using temporary tablespace groups.