Query Processing and Optimization MCQs in DBMS

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1. What is the primary goal of query optimization in a DBMS?



2. Which of the following is an example of a logical optimization technique?



3. What does the term ‘cost-based optimization’ refer to in DBMS?



4. Which of the following is not typically considered during physical query optimization?



5. What is a ‘query execution plan’ in the context of DBMS?



6. Which join method is most efficient when one of the tables is very small compared to the other?



7. What does the ‘SELECTIVITY’ of a query refer to?



8. In query processing, what is ‘pipelining’?



9. Which operator is used to combine the results of two queries into a single result set in SQL?



10. What is the purpose of using ‘statistics’ in query optimization?



11. Which of the following is a heuristic-based optimization technique?



12. What is a ‘materialized view’ in the context of query optimization?



13. Which algorithm is used for optimizing complex queries with multiple joins?



14. In the context of query optimization, what is ‘predicate pushdown’?



15. Which of the following is an example of a physical operator in a query execution plan?



MCQs on Query Processing and Optimization in DBMS

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