Free Practice MongoDB C100DBA Exam Questions 2025

Stay ahead with 100% Free MongoDB Certified DBA Associate C100DBA Dumps Practice Questions

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Total 134 Questions | Updated On: Apr 08, 2025

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Question 1

Which of the following collections stores authentication credentials in MongoDB?

A : test.users

B : local.users

C : system.users

D : users.users

Answer: C

Question 2

You perform the following operation in the shell: db.foo.insert( { } ); What gets inserted?

A : A document will be inserted with the same _id as the last document inserted

B : A document that matches the collection's existing schema, but with null fields

C : A document with an _id assigned to be an Objectld

D : An empty document

E : No document will be inserted; an error will be raised

Answer: C

Question 3

Below is a sample document of 'orders' collection

Other-Image-2821600ab-2cee-4cd9-a321-aa3202108fcf

A : $project

Answer: A

Question 4

Which mongodb tools allow us to work with our data in a human readable format?

A : mongodump

B : mongostat

C : mongoimport

D : mongoexport

Answer: C,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 : Average of likes on all the posts of an author, grouped by author

B : Number of posts by an author

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

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

Answer: D

Page: 1 / 27

Total 134 Questions | Updated On: Apr 08, 2025

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