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Question 1
An e-commerce app always displays each order together with its line items, and the line items are never queried independently. How should you model the data in Azure Cosmos DB for NoSQL?
Correct Answer:
Embed the line items inside the order document
Question 2
A social media application stores posts with potentially millions of comments per post. Comments are loaded separately and grow without a practical upper bound. Which modeling approach is best?
Correct Answer:
Store comments separately and relate them to the post
Question 3
A checkout workflow must create an order header and several order-event items atomically. All items can share the same partition key value. Which feature should you use?
Correct Answer:
Transactional batch
Question 4
A shopping-cart document should be deleted automatically if the customer abandons the cart for 24 hours. Which feature should you enable?
Correct Answer:
Time to Live (TTL)
Question 5
An IoT solution stores telemetry from millions of devices. Most reads and writes are scoped to a single device. Which partition key is the best starting choice?
Correct Answer:
/deviceId
Question 1
Exam overview

About this Exam

Prepare with the DP-420 Practice Questions - Azure Cosmos DB Developer Specialty (DP-420) Exam practice quiz. This question bank includes 100 questions covering cosmos, application, data, team, and container. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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DP-420 Practice Questions - Azure Cosmos DB Developer Specialty (DP-420) Exam

This practice set contains 100 questions from the matching question bank and focuses on cosmos, application, data, team, and container. 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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