Free MongoDB C100DBA Exam Questions

Become MongoDB Certified with updated C100DBA exam questions and correct answers

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Total 134 Questions | Updated On: Feb 24, 2022

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Question 1

Which of the following commands can cause the database to be locked?

A : l of the above

B : erting data

C : p-reduce

D : uing a query

Answer: A

Question 2

Which mongodb tool is used to report details on number of database operations in MongoDB?

A : ngostat

B : ngotop

C : ngorestore

D : ngodump

Answer: A

Question 3

You have a replicated cluster with 1 primary, 3 secondary, 1 arbiter. One of the secondary is hidden. What is the replication factor of this replicated cluster?

A : 7

B : 03

C : 04

D : 06

Answer: C

Question 4

Which option can be used with update command so that a new document gets created if no matching document is found based on the query condition?

A : ert command instead of update command

B : {update: true, insert: true} as the third parameter of update command

C : is has to be handled in application code (Node.js, PHP, JAVA, C#, etc.) and cannot be handled in mongo shell query

D : ecify {upsert : true } as the third parameter of update command

Answer: D

Question 5

What does the output x of the following MongoDB aggregation query result into; db.posts.aggregate( [ { $group: { _id; '$author', x: { $sum: $likes } } } ] )

A : erage of likes on all the posts of an author, grouped by author

B : mber of posts by an author

C : m of likes on all the posts by all the authors

D : m of likes on all the posts by an author, grouped by author

Answer: D

Page: 1 / 27

Total 134 Questions | Updated On: Feb 24, 2022

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