MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam - MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam

Question 1

Which mongosh command inserts a single document into the 'orders' collection?

db.orders.insertOne({ item: 'book', qty: 5 }) db.orders.insertMany({ item: 'book', qty: 5 }) db.orders.insert.one({ item: 'book', qty: 5 }) db.orders.add({ item: 'book', qty: 5 })

Correct Answer:

db.orders.insertOne({ item: 'book', qty: 5 })

Question 2

Which query returns all documents in the 'products' collection where the price is greater than 100 and the category is 'electronics'?

db.products.find({ price: { $gt: 100 }, category: 'electronics' }) db.products.find({ price: > 100, category: 'electronics' }) db.products.find({ $and: { price: 100, category: 'electronics' } }) db.products.find({ price: { $gte: 100 }, category: 'electronics' })

Correct Answer:

db.products.find({ price: { $gt: 100 }, category: 'electronics' })

Question 3

What does the following aggregation pipeline return? db.sales.aggregate([ { $match: { status: 'completed' } }, { $group: { _id: '$region', total: { $sum: '$amount' } } } ])

The total sales amount grouped by region for completed sales The count of completed sales documents grouped by region All completed sales documents sorted by region The average sales amount per region for all sales regardless of status

Correct Answer:

The total sales amount grouped by region for completed sales

Question 4

In an aggregation pipeline, which stage would you use to join documents from a 'customers' collection into an 'orders' collection based on a matching customer ID?

$$lookup $$merge $$graphLookup $$unionWith

Correct Answer:

$$lookup

Question 5

You want to create a compound index on the 'orders' collection to efficiently support queries that filter on 'customerId' and sort by 'orderDate' descending. Which command is correct?

db.orders.createIndex({ customerId: 1, orderDate: -1 }) db.orders.createIndex({ customerId: 1 }, { orderDate: -1 }) db.orders.addIndex({ customerId: 1, orderDate: -1 }) db.orders.createIndex({ customerId: -1, orderDate: 1 })

Correct Answer:

db.orders.createIndex({ customerId: 1, orderDate: -1 })

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About this Exam

Prepare with the MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam practice quiz. This question bank includes 100 questions covering aggregation, documents, stage, mongodb, and field. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam

This practice set contains 100 questions from the matching question bank and focuses on aggregation, documents, stage, mongodb, and field. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam

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