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Free MongoDB C100DBA Actual Exam Questions
The questions for this exam were last updated on January 7, 2026
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If the value of totalKeysExamined is 30000 and the value of totalDocsExamined is 0, which of the following option is correct?
Select one option, then reveal solution.
Question No. 2
The oplog (operations log) is a special capped collection that keeps a rolling record of all operations that modify the data stored in your databases. All the replica set members contain a copy of the oplog in the following collection:
Select one option, then reveal solution.
Question No. 3
‘$set' sets the value of
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Question No. 4
What does the totalKeysExamined field returned by the explain method indicate?
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Question No. 5
Which mongodb tools allow us to work with our data in a human readable format?
Select all that apply, then reveal solution.
Question No. 6
Which of the following is incorrect statement about find and findOne operations in MongoDB?
Select one option, then reveal solution.
Question No. 7
In a sharded replicas set environment with multiple mongos servers, which of the following would decide the mongos failover?
Select one option, then reveal solution.
Question No. 8
Aggregation Pipelines have a limit of:
Select one option, then reveal solution.
Question No. 9
Which of the following operator can be used to control the number of items of an array that a query returns?
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Question No. 10
MongoDB is a schema-less design.
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Question No. 11
What tool do you use to see if you have a problem in the consumption of disk I / 0?
Question No. 12
What tool would you use if you want to save a gif file in mongo?
Question No. 13
Write the command(s) are correct to enable sharding on a database "testdb" and shard a collection "testCollection" with _id as shard key.
Question No. 14
What tool do you use if you want to extract a CSV from mongo?
Question No. 15
The MongoDB explain() method does not support which of the following verbosity mode:
