Free MongoDB C100DEV Exam Questions

Become MongoDB Certified with updated C100DEV exam questions and correct answers

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Total 411 Questions | Updated On: Mar 24, 2026
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Question 1

You are a MongoDB Associate Developer and need to demonstrate how to load the Atlas Sample Dataset into your MongoDB Atlas cluster. Your manager has asked you to guide a junior developer through this process to ensure they can independently load the dataset. What steps should the junior developer follow to successfully load the Atlas Sample Dataset?


Answer: A
Question 2

What is the best practice in using the $match operator?


Answer: D
Question 3

When sharding a MongoDB collection, what is the main factor that determines the distribution of data across shards?


Answer: D
Question 4

In your database there is a collection named trips with the following document structure:
{
  '_id': ObjectId("572bb8222b288919b68abf6d"),
  'trip_duration': 858,
  'start_station id': 532,
  'end_station_id': 401,
  'bike_id': 17057,
  'start_station_loc': { type: 'Point', coordinates: [ -73.960876, 40.710451 ] },
  'end_station_loc': { type: 'Point', coordinates: [ -73.98997825, 40.72019576 ] },
  'start_time': ISODate("2016-01-01T00:09:31.000Z"),
  'stop_time': ISODate("2016-01-01T00:23:49.000Z")
}
How can you extract all trips from this collection ended at stations that are to the west of the -73.5 longitude coordinate?


Answer: C
Question 5

How does MongoDB handle sorting on fields that contain missing values (i.e., values that are not present in all documents in the collection)?


Answer: C
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Total 411 Questions | Updated On: Mar 24, 2026
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