Oracle Performance Tuning Mock Interview

Master 30 Oracle Performance Tuning interview questions covering SQL optimization, indexing strategies, and execution plans.

WRITTEN BY WILLIAM SWANSEN
QUESTION 5 OF 30

Can you discuss the different types of optimizers you use?

This question can either stand by itself be a follow-up to a question you were asked earlier during the interview. Interviewers will typically ask follow-up questions to clarify your previous answer or collect additional information about the topic. Interviewers may ask follow-up questions at any time during the interview, but typically they immediately follow the original question.

When you recognize a question as a follow-up, quickly review the previous questions and your answers to identify the topic you are being asked about and refresh yourself on how you originally responded to the interviewer's question. Knowing this will enable you to expand on your original answer or answer similarly. Interviewers will appreciate consistency between your original answer and response to this follow-up question.

"There are two main types of optimizers I use to tune in oracle database. The first is a Rule-Based Optimizer or RBO. The other is a CBO, which is a Cost-Based Optimizer. Which optimizer I use is based on the guidance provided by the database project stakeholders and the objective of the optimization. It is not unusual to use elements of both the RBO and the CBO when optimizing a database."

William Swansen
30 QUESTIONS & ANSWERS · ORACLE PERFORMANCE TUNING
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