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: Nov 24, 2025
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Question 1

What command can you use to create a capped collection named latest_news that will be limited to 3 documents and 10,000 bytes?


Answer: B
Question 2

In the context of MongoDB development, you are creating a new service that is expected to handle high load. You've decided to leverage the MongoDB drivers' connection pooling capability. What best describes connection pooling and its advantages?


Answer: C
Question 3

Suppose you have a products collection with an index:
{ product_category: 1 }
For which of the following queries can MongoDB look at only a subset of the index entries, rather than all of the index entries?


Answer: D
Question 4

You are designing a MongoDB schema for an e-commerce platform. The system has three collections: Products, Categories, and Reviews.Products Collection: Contains information about each product, including its name, price, and categoryId referencing the Categories collection.Categories Collection: Contains the category name and description.Reviews Collection: Contains user reviews for products, including the productId referencing the Products collection, userId, rating, and reviewText.Which of the following is the best approach to model the relationships between Products, Categories, and Reviews in MongoDB?


Answer: A
Question 5

What is the correct syntax to insert multiple documents into a MongoDB collection named orders and return the _id values for all inserted documents?


Answer: B
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Total 411 Questions | Updated On: Nov 24, 2025
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