Query Optimization Quizzes, Questions & Answers

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Do you know about performance tuning in the Oracle databases? Take this "Oracle Performance Tuning trivia quiz" and assess yourself. Performance tuning is the process of administering an Oracle database to improve...

Questions: 19 | Attempts: 908 | Last updated: Aug 18, 2025

Sample Question 1
What best describes the relationship between indexes and SQL performance?

Indexes are only used in special cases

Indexes are used to make table storage more efficient

Indexes rarely make a difference in SQL performance

Indexes exist solely to improve query speed.

Sample Question 2
Which of the following is not an important Oracle tuning metric?

Buffer hit ratio

Library cache hit ratio

Full-table scans

Buffer busy waits

Sample Question 3
Why is searching for large-table full-table scans critical to SQL tuning?

They indicate an optimized execution plan.

They may be able to be tuned to use an index

The full-table scan should be normalized from the database design

A full-table scan is always sub-optimal.