Exam AWS Certified Database - Specialty topic 1 question 278 discussion

Exam question from Amazon's AWS Certified Database - Specialty

Question #: 278
Topic #: 1

[All AWS Certified Database - Specialty Questions]

A company is using Amazon DocumentDB (with MongoDB compatibility) to manage its complex documents. Users report that an Amazon DocumentDB cluster takes a long time to return query results. A database specialist must investigate and resolve this issue.

Which of the following can the database specialist use to investigate the query plan and analyze the query performance?

A. AWS X-Ray deep linking
B. Amazon CloudWatch Logs Insights
C. MongoDB explain() method
D. AWS CloudTrail with a custom filter

Show Suggested Answer

Suggested Answer: C 🗳️

by Sab at Dec. 1, 2022, 2:39 a.m.

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Pranava_GCP

1 year, 9 months ago

Selected Answer: C

C. MongoDB explain() method

upvoted 2 times

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aviathor

2 years ago

Selected Answer: C

explain() in order to retrieve the query plan, since that was the question...

upvoted 3 times

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Sab

2 years, 6 months ago

Selected Answer: C

https://docs.aws.amazon.com/documentdb/latest/developerguide/user_diagnostics.html#user_diagnostics-query_plan

upvoted 4 times

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Sab

2 years, 6 months ago

C If a query runs slow, it could be because the query execution requires a full scan of the collection to choose the relevant documents. Sometimes creating appropriate indexes enables the query to run faster. To detect this scenario and decide the fields on which to create the indexes, use the explain command. https://docs.aws.amazon.com/documentdb/latest/developerguide/user_diagnostics.html#user_diagnostics-query_plan

upvoted 4 times

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