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: Apr 28, 2026

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Question 1

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

A : ngodump

B : ngostat

C : ngoimport

D : ngoexport

Answer: C,D

Question 2

Which of the following collections stores authentication credentials in MongoDB?

A : t.users

B : cal.users

C : tem.users

D : ers.users

Answer: C

Question 3

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 4

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 5

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

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

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

C : document with an _id assigned to be an Objectld

D : empty document

E : document will be inserted; an error will be raised

Answer: C

Page: 1 / 27

Total 134 Questions | Updated On: Apr 28, 2026

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