1z0-417: Oracle Database Performance and Tuning Essentials 2015 Query Practice Questions
The free 1z0-417: Oracle Database Performance and Tuning Essentials 2015 questions that deal with query, with answers and explanations. The full bank and the timed practice test cover every topic the exam asks about.
Question #3
When tuning a SQL query, which of the following factors should be considered first?
Correct answer: B
Explanation
Analyzing the execution plan reveals how a SQL query is being executed and where potential optimizations can be made.
Question #7
You notice that a specific query is taking too long to execute. What is the first thing you should check?
Correct answer: D
Explanation
Checking index usage can reveal whether the query is using available indexes effectively, which directly impacts performance.
Question #8
A developer runs an aggregate query that occasionally fails due to timeout issues. What could be a potential solution?
Correct answer: A
Explanation
Improving the index can help in reducing the time taken for aggregation, thereby preventing timeouts.
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