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: Oct 28, 2025

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Question 1

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 2

Which of the following is a benefit of using the Automatic SQL Tuning feature in Oracle Database 19c?

A : It automatically identifies and tunes high-load SQL statements

B : It enables the creation of SQL profiles for better plan stability

C : It provides real-time SQL monitoring for optimizing query execution

D : It automatically enables the SQL plan directives feature

Answer: A

Question 3

Which of the following techniques is most effective for improving query performance in an Oracle database?

A : Using optimizer hints

B : Increasing the SGA size

C : Adding more indexes to the tables

D : Rewriting the SQL queries

Answer: B

Question 4

What does the Automatic Database Diagnostic Monitor (ADDM) provide?

A : Information about the root cause of performance problems

B : Recommendations for resolving performance issues

C : Automatic performance analysis and diagnosis

D : All of the above

Answer: D

Question 5

Accessing the SALES tables causes excessive db file sequential read wait events. Examine this AWR except:

Now, examine these attributes displayed by querying dba_tables:

Finally, examine these parameter settings:

Which two must both be used to reduce these excessive waits?

A : Partition the SALES table.

B : Increase PCTFREE for the SALES table.

C : Re-create the SALES table.

D : Compress the SALES table.

E : Coalesce all sales table indexes.

Answer: A,D

Page: 1 / 76

Total 378 Questions | Updated On: Oct 28, 2025

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