SQL for Java Devs · interview question
When analyzing a query execution plan, which of the following indicates an inefficient use of indexes?
Multiple choiceHardchapter-8-curatedpremiumsql-for-java-devsindexes
Answer and explanation
Correct answer
C. A full table scan is performed.
Why
A full table scan suggests that the query is not utilizing available indexes effectively, which can lead to slower performance. Efficient queries typically use indexes to avoid scanning all rows in a table.
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