Free MongoDB C100DEV Exam Questions
Absolute Free C100DEV Exam Practice for Comprehensive Preparation
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MongoDB C100DEV Exam Questions
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Provided By: MongoDB
- Exam: MongoDB Certified Developer Associate
- Certification: MongoDB Certified Developer Associate
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Total Questions: 411
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Updated On: Jul 24, 2026
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Rated: 4.9 |
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Online Users: 822
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Question 1
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You are developing a MongoDB application where write performance is a critical requirement. Given a scenario where your application primarily performs insert operations and rarely performs updates or deletes, which of the following MongoDB features would best optimize this heavy-write workload?
Answer: D
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You are developing a MongoDB application where write performance is a critical requirement. Given a scenario where your application primarily performs insert operations and rarely performs updates or deletes, which of the following MongoDB features would best optimize this heavy-write workload?
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Question 2
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Consider a collection named orders with the following documents:{"_id" : ObjectId("5f0a7e80d8c9c7b5a48c49e1"),"order_id" : 101,"customer_name" : "John Doe","order_date" : ISODate("2022-01-01T00:00:00.000Z"),"items" : [{"product_name" : "Apple","quantity" : 2,"price" : 0.99},{"product_name" : "Banana","quantity" : 5,"price" : 0.5}]}{"_id" : ObjectId("5f0a7e80d8c9c7b5a48c49e2"),"order_id" : 102,"customer_name" : "Jane Doe","order_date" : ISODate("2022-01-02T00:00:00.000Z"),"items" : [{"product_name" : "Orange","quantity" : 3,"price" : 0.79},{"product_name" : "Mango","quantity" : 2,"price" : 1.99}]}{"_id" : ObjectId("5f0a7e80d8c9c7b5a48c49e3"),"order_id" : 103,"customer_name" : "Bob Smith","order_date" : ISODate("2022-01-03T00:00:00.000Z"),"items" : [{"product_name" : "Peach","quantity" : 4,"price" : 1.49},{"product_name" : "Pear","quantity" : 1,"price" : 2.99}]}What is the query to retrieve the total sales for each customer in the orders collection?
Answer: B
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Question 3
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Given a movies collection where each document has the following structure:{_id: ObjectId('573a1390f29313caabcd60e4'),genres: [ 'Short', 'Comedy', 'Drama' ],title: 'The Immigrant',year: 1917,imdb: { rating: 7.8, votes: 4680, id: 8133 },countries: [ 'USA' ]}Which of the following queries will find all the movies that have more votes than the year in which they were released?
Answer: D
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Question 4
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What is the best practice in using the $match operator?
Answer: D
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What is the best practice in using the $match operator?
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Question 5
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In a MongoDB collection named orders, you are tasked with retrieving a subset of documents that fulfill specific criteria. Each document in this collection contains the following fields: customerId, orderId, orderDate, and orderDetails (an embedded document with fields: product, quantity, unitPrice). You are required to fetch all orders made by the customer with a customerId of 1234 on a specific date 2023-04-12, and only return the orderId, orderDate, and product from orderDetails. Which of the following MongoDB queries would accurately fulfill these requirements?
Answer: A
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In a MongoDB collection named orders, you are tasked with retrieving a subset of documents that fulfill specific criteria. Each document in this collection contains the following fields: customerId, orderId, orderDate, and orderDetails (an embedded document with fields: product, quantity, unitPrice). You are required to fetch all orders made by the customer with a customerId of 1234 on a specific date 2023-04-12, and only return the orderId, orderDate, and product from orderDetails. Which of the following MongoDB queries would accurately fulfill these requirements?