Execution Plan Analysis Quiz

Quiz covering Query Optimization

Questions in this quiz

A preview of the 5 questions covered. Start the quiz above to answer them, check your score, and read the explanations.

1. 1

   In an execution plan, what does a 'Table Scan' or 'Clustered Index Scan' typically indicate when processing a small subset of data?

2. 2

   Which of the following is a common symptom of a 'Key Lookup' (or Bookmark Lookup) operation in an execution plan?

3. 3

   When analyzing an execution plan, what does a 'Hash Match' join operator typically suggest about the data being joined?

4. 4

   What is the primary indicator of an 'Implicit Conversion' warning in an execution plan?

5. 5

   You notice a 'Nested Loop' join in your execution plan where the 'Outer' input is a small table and the 'Inner' input is a large table. What is the most likely cause of high cost if the inner table lacks an index?