Free Oracle 1Z0-084 Exam Questions

Become Oracle Certified with updated 1Z0-084 exam questions and correct answers

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Total 378 Questions | Updated On: Aug 01, 2026

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Question 1

Which three statements are true about tuning dimensions and details of v$sys_time_model and DB time?

A : Statspack cannot account for high CPU time when CPU TIME is a Top 10 event in DB time. When CPU time is high, SQL tuning may improve performance.

B : Systems in which CPU time is dominant need more tuning that those in which WAIT TIME is dominant.

C : The proportion of WAIT TIME to CPU TIME always increases with increased system load.

D : When WAIT TIME is high, instance tuning may improve performance.

E : Parse Time Elapsed accounts for successful soft and hard parse operations only.

F : DB Time accounts for all time used by background processes and user sessions.

Answer: A,D,F

Question 2

A company is experiencing performance issues with a database. After analyzing the workload, it was discovered that there are multiple expensive queries being executed frequently. Which feature can be used to automatically identify and tune these queries?

A : SQL Tuning Advisor

B : SQL Access Advisor

C : SQL Performance Analyzer

D : SQL Plan Management

Answer: A

Question 3

Which statement about Undo and Redo Management is correct?

A : The UNDO_RETENTION parameter determines the minimum amount of time that undo data will be retained in the undo tablespace.

B : The MAXTRANS parameter determines the maximum number of transactions that can be concurrently active on a given data block.

C : The UNDO_TABLESPACE parameter specifies the name of the default tablespace used for storing undo data.

D : The LOG_BUFFER parameter determines the size of the redo log buffer in memory.

Answer: A

Question 4

Which statement is true regarding the sizing and tuning of the shared pool and buffer cache in Oracle Database 19c?

A : The shared pool and buffer cache should always be sized to use as much memory as possible to improve performance.

B : The shared pool and buffer cache should always be sized conservatively to avoid excessive memory usage.

C : The shared pool and buffer cache should be sized based on the estimated workload and available memory.

D : The shared pool and buffer cache should only be tuned after performance issues occur.

Answer: C

Question 5

Which of the following is a benefit of using SQL Plan Management (SPM)?

A : Prevents plan regression

B : Improves query performance

C : Automatically tunes SQL statements

D : Manages index usage

Answer: A

Page: 1 / 76

Total 378 Questions | Updated On: Aug 01, 2026

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