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MongoDB C100DBA Exam With Confidence Using Practice Dumps

Exam Code:
C100DBA
Exam Name:
MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4)
Certification:
MongoDB Certified DBA Associate
Vendor:
MongoDB
Questions:
132
Last Updated:
Feb 17, 2026
Exam Status:
Stable
MongoDB C100DBA

C100DBA: MongoDB Certified DBA Associate Exam 2025 Study Guide Pdf and Test Engine

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MongoDB Certified DBA Associate Exam (Based on MongoDB 4.4) Questions and Answers

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Question 1

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

Options:

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

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Question 2

Which of the following is true about sharding?

Options:

A.

Creating a sharded key automatically creates an index on the collection using that key

B.

We cannot change a shard key directly/automatically once it is set up

C.

A sharded environment does not support sorting functionality since the documents lie on various mongod instances

D.

Sharding is enabled at the database level

Question 3

As per the aggregation pipeline optimization concepts, if you have a $sort followed by a $match:

Options:

A.

Providing these parameters in any order does not impact the performance

B.

$sort moves before $match

C.

MongoDB does not do any movements by default and will use the order provided

D.

$match moves before $sort

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