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  • DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB

Microsoft DP-420 Exam Questions

Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Exam Code: DP-420
Related Certification(s): Microsoft Azure Cosmos DB Developer Specialty Certification
Certification Provider: Microsoft
Actual Exam Duration: 100 Minutes
Number of DP-420 practice questions in our database: 144 (updated: Oct. 09, 2025)
Expected DP-420 Exam Topics, as suggested by Microsoft :
  • Topic 1: Design and Implement Data Models: This topic equips Microsoft developers to design and implement non-relational data models for Azure Cosmos DB for NoSQL, emphasizing partitioning strategies, database sizing, and scaling. Developers master connectivity using the Azure Cosmos DB SDK and SQL language for NoSQL, ensuring seamless data access. Additionally, server-side programming with JavaScript empowers robust solutions tailored to specific application needs.
  • Topic 2: Design and Implement Data Distribution: Microsoft developers delve into designing replication strategies and implementing multi-region writes for Azure Cosmos DB. These skills ensure high availability, fault tolerance, and enhanced global performance for distributed applications, making them vital for enterprise-grade solutions.
  • Topic 3: Integrate an Azure Cosmos DB Solution: This topic focuses on enabling analytical workloads and integrating Azure Cosmos DB across services. Developers learn to leverage cross-service integrations for cohesive solutions, driving advanced analytics and operational efficiency in cloud-native applications.
  • Topic 4: Optimize an Azure Cosmos DB Solution: Developers gain expertise in optimizing query performance using Azure Cosmos DB for NoSQL APIs, implementing change feeds, and crafting effective indexing strategies. This topic ensures solutions are performant, scalable, and adaptive to evolving data requirements, enhancing application responsiveness.
  • Topic 5: Maintain an Azure Cosmos DB Solution: This section covers monitoring, troubleshooting, and securing Azure Cosmos DB solutions. Developers master backup and restore procedures, implement data movement, and streamline processes using DevOps. These skills ensure operational reliability and safeguard data integrity in production environments.
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Hui

4 days ago
I was jittery before the exam, doubting if I could juggle Cosmos DB concepts with design patterns; PASS4SUCCESS gave me structured practice, steady guidance, and real-world scenarios that built true confidence. To everyone chasing this certification, stay focused and trust your preparation—you've got this!
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Kaitlyn

14 days ago
Passed the Azure Cosmos DB cert! Pass4Success's targeted questions were exactly what I needed.
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Mari

15 days ago
I recently passed the Microsoft Azure Cosmos DB exam, thanks to Pass4Success. One challenging question was about maintaining an Azure Cosmos DB solution, specifically how to implement backup and restore strategies. Even though I was unsure, I succeeded!
upvoted 0 times
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Brandon

18 days ago
Just passed the Azure Cosmos DB exam! Pass4Success's questions were spot-on. Thanks for the quick prep!
upvoted 0 times
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Adelaide

1 months ago
Cosmos DB exam conquered! Huge thanks to Pass4Success for their accurate and time-saving resources.
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German

1 months ago
I passed the Azure Cosmos DB exam, and Pass4Success was a key resource. One question that had me stumped was about optimizing an Azure Cosmos DB solution, specifically how to use RU/s effectively to manage costs. Despite my uncertainty, I passed!
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Wilburn

3 months ago
Just became Azure Cosmos DB certified! Pass4Success's materials were spot-on for exam prep.
upvoted 0 times
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Lili

4 months ago
Nailed the Microsoft Cosmos DB exam! Pass4Success's relevant questions were a huge time-saver.
upvoted 0 times
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Alecia

6 months ago
Azure Cosmos DB certified! Pass4Success's concise materials helped me prepare quickly and effectively.
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Tiffiny

7 months ago
Passed the Cosmos DB exam on my first try! Pass4Success's focused content made all the difference.
upvoted 0 times
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Ressie

8 months ago
Thank you Pass4Success! Your practice questions were key to my Azure Cosmos DB exam success.
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Ivory

9 months ago
Thrilled to share that I passed the Microsoft Azure Cosmos DB exam! Pass4Success practice questions were essential. There was a difficult question on designing and implementing data distribution, particularly about handling data consistency across multiple regions. I wasn't confident, but I passed!
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Erick

9 months ago
Microsoft Cosmos DB cert acquired! Couldn't have done it without Pass4Success's efficient study materials.
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Rosalind

10 months ago
I passed the Azure Cosmos DB exam, and Pass4Success practice questions were a great help. One tricky question was about designing and implementing data models, specifically how to model relationships between entities. Even though I was unsure, I passed!
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Shawnta

10 months ago
Pass4Success rocks! Their prep materials helped me clear the Azure Cosmos DB exam in no time.
upvoted 0 times
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Cheryl

10 months ago
I successfully passed the Microsoft Azure Cosmos DB exam, thanks to Pass4Success. One question that puzzled me was about integrating an Azure Cosmos DB solution with Azure Logic Apps. I wasn't entirely sure how to set up the integration, but I managed to pass!
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Laticia

11 months ago
Happy to announce that I passed the Azure Cosmos DB exam! Pass4Success practice questions were crucial. There was a challenging question on maintaining an Azure Cosmos DB solution, specifically about configuring multi-region writes. I wasn't sure of the best approach, but I still passed!
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Wendell

11 months ago
Are there questions on optimizing query performance?
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Noemi

11 months ago
Aced the Microsoft Cosmos DB exam! Pass4Success really came through with relevant practice questions.
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Catarina

11 months ago
I passed the Microsoft Azure Cosmos DB exam, and Pass4Success practice questions were a big help. One question that had me second-guessing was about optimizing an Azure Cosmos DB solution, particularly how to use indexing policies to improve query performance. Despite my doubts, I passed!
upvoted 0 times
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Mari

12 months ago
How about questions on monitoring and optimizing throughput?
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Gregg

12 months ago
Excited to share that I passed the Azure Cosmos DB exam! The practice questions from Pass4Success were invaluable. There was a tough question on designing and implementing data distribution, specifically about choosing the right partition strategy for a global application. I wasn't completely confident, but I passed!
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Sage

1 years ago
Are there questions on implementing server-side programming?
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Glen

1 years ago
I passed the Microsoft Azure Cosmos DB exam, and Pass4Success was instrumental. One question I found challenging was about designing and implementing data models, particularly how to use partition keys effectively. Even though I was unsure, I succeeded!
upvoted 0 times
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Alysa

1 years ago
Whew, that Azure Cosmos DB cert was tough! Grateful for Pass4Success - their materials were a lifesaver.
upvoted 0 times
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Sanjuana

1 years ago
How much emphasis is there on Cosmos DB's analytical capabilities?
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Gilma

1 years ago
Just cleared the Azure Cosmos DB exam! Pass4Success practice questions were a huge help. There was a tricky question on integrating an Azure Cosmos DB solution with Azure Functions. I wasn't sure about the best way to trigger a function from a Cosmos DB change feed, but I still made it through.
upvoted 0 times
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Matilda

1 years ago
Throughput management is a key focus. You'll see questions on provisioning and scaling RUs, implementing autoscale, and monitoring throughput usage. Understand how to optimize for cost-effective performance. Pass4Success materials had great scenarios on throughput optimization.
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Precious

1 years ago
I recently passed the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam, thanks to the practice questions from Pass4Success. One question that stumped me was about maintaining an Azure Cosmos DB solution, specifically how to handle automatic failover for high availability. Despite my uncertainty, I managed to pass!
upvoted 0 times
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Youlanda

1 years ago
Just passed the Azure Cosmos DB exam! Thanks Pass4Success for the spot-on practice questions. Saved me loads of time.
upvoted 0 times
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Zachary

1 years ago
Passing the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam was a great achievement for me, and I owe a big thanks to Pass4Success for their helpful practice questions. The topic of enabling offline development by using the Azure Cosmos DB emulator was crucial for my exam preparation. One question that I recall from the exam was about setting up and using the Azure Cosmos DB emulator for offline development. Despite some initial confusion, I managed to pass the exam successfully.
upvoted 0 times
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Leota

1 years ago
The exam experience was challenging but rewarding. I'm grateful for the comprehensive preparation materials from Pass4Success that helped me pass in a short time.
upvoted 0 times
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Maurine

1 years ago
My exam experience for the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB was successful, thanks to Pass4Success practice questions. I found the topic of implementing data access by using the Azure Cosmos DB SQL language to be particularly challenging. One question that I remember from the exam was about optimizing data access performance using the SQL language in Azure Cosmos DB. Despite some uncertainty, I was able to pass the exam.
upvoted 0 times
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Aracelis

1 years ago
Just passed the Azure Cosmos DB exam! Watch out for questions on multi-region write replication - they test your understanding of conflict resolution strategies. Brush up on choosing between strong and eventual consistency models. Big thanks to Pass4Success for their spot-on practice questions that helped me prepare quickly!
upvoted 0 times
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Kattie

1 years ago
The exam covered various consistency levels in Cosmos DB. Be prepared for scenarios where you need to select the appropriate consistency level based on application requirements. Understanding trade-offs between consistency and performance is crucial.
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Teddy

1 years ago
I recently passed the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam with the help of Pass4Success practice questions. The exam covered topics such as designing partitioning for workloads that require multiple partition keys. One question that stood out to me was related to designing a partitioning strategy for a scenario where multiple partition keys were needed. I wasn't completely sure of the answer, but I managed to pass the exam.
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Free Microsoft DP-420 Exam Actual Questions

Note: Premium Questions for DP-420 were last updated On Oct. 09, 2025 (see below)

Question #1

You have a container in an Azure Cosmos DB for NoSQL account that stores data about orders. The following is a sample of an order document.

Documents are up to 2 KB.

You plan to receive one million orders daily.

Customers will frequently view then past order history.

You are the evaluating whether to use orderDate as the partition key.

What are two effects of using orderDate as the partition key? Each correct answer presents a complete solution.

NOTE: Each correct selection is worth one point.

Reveal Solution Hide Solution
Correct Answer: B, D

Question #2

You have an application named App1 that reads the data in an Azure Cosmos DB Core (SQL) API account. App1 runs the same read queries every minute. The default consistency level for the account is set to eventual.

You discover that every query consumes request units (RUs) instead of using the cache.

You verify the IntegratedCacheiteItemHitRate metric and the IntegratedCacheQueryHitRate metric. Both metrics have values of 0.

You verify that the dedicated gateway cluster is provisioned and used in the connection string.

You need to ensure that App1 uses the Azure Cosmos DB integrated cache.

What should you configure?

Reveal Solution Hide Solution
Correct Answer: C

Because the integrated cache is specific to your Azure Cosmos DB account and requires significant CPU and memory, it requires a dedicated gateway node. Connect to Azure Cosmos DB using gateway mode.


Question #3

You have an Azure Cosmos DB for NoSQL account that contains a database named DB1 and a container named Container1. You need to manage the account by using the Azure Cosmos DB SDK. What should you do?

Reveal Solution Hide Solution
Correct Answer: C

Question #4

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.

After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.

You have an Azure Cosmos DB Core (SQL) API account named account 1 that uses autoscale throughput.

You need to run an Azure function when the normalized request units per second for a container in account1 exceeds a specific value.

Solution: You configure an application to use the change feed processor to read the change feed and you configure the application to trigger the function.

Does this meet the goal?

Reveal Solution Hide Solution
Correct Answer: B

Instead configure an Azure Monitor alert to trigger the function.

You can set up alerts from the Azure Cosmos DB pane or the Azure Monitor service in the Azure portal.


Question #5

You have an Azure Cosmos DB for NoSQL account1 that is configured for automatic failover. The account1 account has a single read-write region in West US and a and a read region in East US.

You run the following PowerShell command.

What is the effect of running the command?

Reveal Solution Hide Solution
Correct Answer: B

You can use the Set-AzCosmosDBAccountRegion cmdlet to update the regions that an Azure Cosmos DB account uses. You can use this cmdlet to add a region or change the region failover order.The cmdlet requires a resource group name, an Azure Cosmos DB account name, and a list of regions in desired failover order1.

For your scenario, based on the PowerShell command, you are using the Set-AzCosmosDBAccountRegion cmdlet to update the regions for an Azure Cosmos DB account named account1 that is configured for automatic failover. The command specifies two regions: West US and East US. The effect of running the command is thatthe account will be configured for multi-region writes.

Multi-region writes is a feature of Azure Cosmos DB that allows you to write data to any region in your account and have it automatically replicated to all other regions. This feature provides high availability and low latency for write operations across multiple regions.To enable multi-region writes, you need to specify at least two regions in your account and set them as write regions2. In your command, you are setting both West US and East US as write regions by using the -IsZoneRedundant parameter with a value of $true for both regions.


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