MS SQL Server - 73 - Query Processing MCQ

73 – Query Processing MCQ

1 / 25

1. Which phase of query processing in SQL Server involves parsing, syntax checking, and building an initial query tree?

Query Optimization

Query Analysis

Plan Caching

Query Execution

2 / 25

2. What is the primary purpose of query analysis in SQL Server?

Caching query results

Executing SQL queries

Parsing and building an initial query tree

Selecting the best execution plan

3 / 25

3. During query analysis, what does SQL Server do after parsing and building an initial query tree?

Stores the query results in a cache

Sends the query to the query optimizer

Executes the query immediately

Selects the best execution plan

4 / 25

4. In SQL Server, what is the purpose of index selection in query processing?

Selecting the best execution plan

Parsing SQL queries

Building an initial query tree

Caching query results

5 / 25

5. Which phase of query processing in SQL Server involves determining the order in which tables are accessed in a query?

Join Order Selection

Query Optimization

Query Execution

Plan Caching

6 / 25

6. What is the goal of join order selection in SQL Server query processing?

To maximize query caching

To minimize the cost of query execution

To execute joins in the order specified by the query

To execute joins in any random order

7 / 25

7. In SQL Server, which join processing technique uses nested loops to join tables?

Merge Join

Nested Loop Join

Hash Join

Sort-Merge Join

8 / 25

8. What is the primary advantage of using the Hash Join algorithm in SQL Server?

It works efficiently for joining large tables.

It requires sorting of data before joining.

It performs well with small result sets.

It minimizes plan caching.

9 / 25

9. In SQL Server, what is the primary benefit of using the Merge Join algorithm?

It requires sorting of data before joining.

It minimizes plan caching.

It works efficiently for joining large tables.

It performs well with small result sets.

10 / 25

10. What is the primary purpose of plan caching in SQL Server?

To select the best execution plan for queries

To build an initial query tree

To determine the join order

To store query results

11 / 25

11. During query processing in SQL Server, what happens in the plan caching phase?

Building an initial query tree

Selecting the best execution plan

Parsing and syntax checking of queries

Storing query results in a cache

12 / 25

12. What is the main advantage of caching query execution plans in SQL Server?

It eliminates the need for join processing techniques.

It optimizes the index selection process.

It speeds up query execution by reusing pre-optimized plans.

It reduces the need for query analysis.

13 / 25

13. In SQL Server, what is the purpose of the Query Optimization phase?

Building an initial query tree

Caching query results

Parsing SQL queries

Selecting the best execution plan

14 / 25

14. What happens in the Query Execution phase of SQL Server query processing?

Executing the query using the selected execution plan

Storing query results in a cache

Building an initial query tree

Parsing SQL queries

15 / 25

15. In SQL Server, what is the primary goal of query optimization?

To maximize query execution time

To select the best execution plan for a query

To avoid query analysis

To minimize query caching

16 / 25

16. What is the primary advantage of using the Nested Loop Join algorithm in SQL Server?

It minimizes plan caching.

It requires sorting of data before joining.

It works well with large result sets.

It is efficient for small result sets and selective joins.

17 / 25

17. In SQL Server query processing, which phase involves selecting an execution plan for a query?

Index Selection

Query Optimization

Query Execution

Query Analysis

18 / 25

18. What is the primary role of query analysis in SQL Server?

To execute SQL queries

To cache query results

To parse and build an initial query tree

To select the best execution plan

19 / 25

19. During query analysis in SQL Server, what happens after parsing and building an initial query tree?

The query is stored in a cache.

The query is executed immediately.

The query is sent to the query optimizer.

The query is cached for future use.

20 / 25

20. In SQL Server, what is the main function of index selection in query processing?

Caching query results

Building an initial query tree

Parsing SQL queries

Selecting the best execution plan

21 / 25

21. In SQL Server, which phase of query processing involves determining the order in which tables are accessed in a query?

Plan Caching

Query Optimization

Join Order Selection

Query Execution

22 / 25

22. What is the primary objective of join order selection in SQL Server query processing?

To maximize query caching

To execute joins in the order specified by the query

To minimize the cost of query execution

To execute joins in any random order

23 / 25

23. In SQL Server query processing, which join processing technique uses nested loops to join tables?

Sort-Merge Join

Nested Loop Join

Hash Join

Merge Join

24 / 25

24. What is the primary benefit of using the Hash Join algorithm in SQL Server?

It minimizes plan caching.

It requires sorting of data before joining.

It works efficiently for joining large tables.

It performs well with small result sets.

25 / 25

25. In SQL Server, what is the primary advantage of using the Merge Join algorithm?

It minimizes plan caching.

It works efficiently for joining large tables.

It performs well with small result sets.

It requires sorting of data before joining.

Your score is

MS SQL Server – 73 – Query Processing MCQ