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Exam overview

Oracle 1Z0-084 Exam Dumps

Vendor

Oracle

Exam Code

 1Z0-084

Actual Exam Duration
TOTAL QUESTIONS

55

Exam Name

 Oracle Database 19c: Performance Management and Tuning

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Exam practice

Exam Q&A

Select an option, then click Show Answer.

Q1:

Which three types of statistics are captured by statspack with snap level 6?

A: Parent and child latches

B: Parent and child latches

C: Optimizer execution plans

D: Plan usage data

E: Enqueue statistics

F: Segment-level statistics

Correct Answer: A, E, F

Q2:

Which Optimizer component helps decide whether to use a nested loop join or a hash join in an adaptive execution plan?

A: Statistics Feedback

B: SQL Plan Directives

C: Statistics Collector

D: Automatic Reoptimization

E: Dynamic Statistics

Correct Answer: C

Q3:

Which two options are part of a Soft Parse operation?

A: Syntax Check

B: SQL Row Source Generation

C: SQL Optimization

D: Shared Pool Memory Allocation

E: Semantic Check

Correct Answer: E

Q4:

Which two actions can cause invalidation or loss of one or more results in the SQL Query Result Cache?

A: One or more results were aged out of the result cache.

B: result_cache_max_size is set dynamically to 0.

C: A request was made by the RCBG background of a non-RAC database.

D: A request was made by the RCBG background process in a physical standby database that is opened read only and whose primary has a result cache.

E: Decreasing the value set for RESULT_CACHE_REMOTE_EXPIRATION.

Correct Answer: A, B

Q5:

Which three statements are true about using the in Memory (IM) column store?

A: It does not improve performance for queries using cached results of function evaluations on columns from the same table.

B: It does not improve performance for queries that use join groups on columns from different tables.

C: It can improve OLTP workload performance by avoiding the use of indexes.

D: It does not improve performance for queries using user-defined virtual column results.

B: It does not require all database data to fit in memory to improve query performance.

E: It improves performance for queries joining several tables using bloom filter joins.

Correct Answer: C, E, F

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