MongoDB Profiling and Query Analysis: Advanced-Level Quiz

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MongoDB Profiling and Query Analysis Quiz

Welcome to the MongoDB Profiling and Query Analysis quiz! This quiz is designed to test your knowledge of MongoDB’s profiling tools, explain() function, and performance monitoring methods. You’ll tackle questions about profiling levels, query planning, execution stats, and best practices for analyzing and optimizing query performance. Good luck, and let’s dive in!

1 / 20

What does the executionStats verbosity in explain() provide that queryPlanner does not?

2 / 20

Which field in the profiler output shows the actual duration taken by the operation?

3 / 20

What command would you use to enable profiling on a MongoDB database at level 2?

4 / 20

What is the purpose of MongoDB’s profiler?

5 / 20

When using explain() in MongoDB, what does the totalKeysExamined field represent?

6 / 20

At which profiling level does MongoDB log only slow operations based on a specified threshold?

7 / 20

Which command is useful for clearing the profiler data from the system.profile collection?

8 / 20

Which explain() verbosity level only provides the query plan without actual execution statistics?

9 / 20

The profiler can be set to log all operations, including fast-running queries. True or False?

10 / 20

In the executionStats section of explain(), which field indicates the time taken to execute a query?

11 / 20

How can you filter for specific queries in the profiler output?

12 / 20

Which field in the explain() output provides the number of documents scanned by MongoDB during a query execution?

13 / 20

To reset the profiling level, you must restart the MongoDB server. True or False?

14 / 20

Where are profiler data and query statistics stored in MongoDB?

15 / 20

The MongoDB profiler can record aggregation pipeline stages in detail. True or False?

16 / 20

Which explain() option shows data about alternative query plans considered by MongoDB?

17 / 20

Which of the following fields in explain() output provides information about the documents returned by a query?

18 / 20

MongoDB’s profiler must be set to level 2 to capture all queries, regardless of execution time. True or False?

19 / 20

Which MongoDB profiler level completely disables profiling and does not collect any data?

20 / 20

What does the winningPlan field in explain() output indicate?

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MongoDB Profiling and Query Analysis focuses on monitoring and optimizing query performance. Tools like the Database Profiler and explain() method helps identify slow queries, analyze execution plans, and improve index usage.

It’s essential for ensuring efficient operations and maintaining high-performing databases. This quiz is for MongoDB experts who want to enhance their skills in optimizing MongoDB query performance and diagnosing issues through profiling and query analysis.

All the best!