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

Microsoft DP-420 Exam Questions

Exam Name: Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Exam
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: 194 (updated: Sep. 21, 2026)
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Laura Smith

2 days ago
Maintenance topics surprised me with how concrete they were, like backup and restore options, monitoring alerts, and security settings that map to real operations work. I reviewed the portal screens and CLI commands I actually use at work and managed to pass DP 420.
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Brenda Stewart

28 days ago
Maintain an Azure Cosmos DB Solution questions focus on backup and restore options, monitoring, alerting, and performing failover drills in an operational scenario. After passing I prioritized learning built-in backup retention, diagnostic logs, and automated failover testing in a sandbox environment.
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Harold Robinson

1 month ago
Optimization was where I lost time in practice, so I drilled indexing policy changes, query metrics, and when to use composite indexes versus rewriting queries. Once I could explain the why behind each choice, I passed the Microsoft Cosmos DB certification exam.
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Rebecca Hill

2 months ago
Optimize an Azure Cosmos DB solution items usually present telemetry and query metrics and ask which indexing or throughput changes will reduce RU consumption without breaking functionality. I passed and found hands-on practice interpreting Query Metrics, tuning indexing policies, and identifying hot partitions to be most useful.
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Olivia Lewis

2 months ago
A lot of questions leaned into integrating Cosmos DB with apps, so I practiced SDK usage, retry policies, and consistency choices rather than just reading docs. That practical angle helped me stay calm on exam day and I managed to pass.
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Sharon Johnson

3 months ago
Integrate an Azure Cosmos DB Solution style questions required mapping SDK patterns, change feed processors, and managed identity authentication to application code snippets and deployment diagrams. I passed the exam and thanks Pass4Success for quick exam questions that helped me rehearse connection strings, emulator usage, and change feed checkpointing under real conditions.
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Linda King

3 months ago
The trickiest part for me was data distribution and throughput math, especially how hot partitions show up and how to spot them from metrics. Running a few hands on tests in a sandbox account made the questions feel familiar and I passed DP 420.
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Harold Cooper

4 months ago
Design and Implement Data Distribution often shows global application scenarios asking you to pick replication topology, write regions, and failover priorities to meet latency and SLA targets. A colleague who passed recommended studying consistency levels, multi region writes, and how partitioning impacts cross-region traffic.
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Monica Lee

4 months ago
DP 420 felt less about memorizing APIs and more about picking the right partition key and modeling for real query patterns, so I spent most of my prep doing small schema redesigns until the tradeoffs clicked. That focus paid off and I managed to pass the exam.
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Sarah Evans

5 months ago
Design and Implement Data Models questions forced me to choose partition keys and decide when to denormalize versus keep transactional boundaries in scenario-based items that measured RU cost. I passed the exam and thanks Pass4Success for providing a concise set of practice questions that helped me focus on partitioning, item size, and modeling hierarchical documents quickly.
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George Jackson

5 months ago
Choosing the right partition key was the trickiest for me because the scenario questions required estimating item distribution and throughput hotspots, and practicing with workload sketches helped a lot.
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Lisa Nelson

5 months ago
For Microsoft-focused scenarios I rehearsed simple change feed processing flows and failure cases to understand at-least-once semantics.
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Emily Evans

5 months ago
Practicing different access patterns on paper before the exam made it easier to eliminate weak partition key choices quickly.
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Robert Rivera

5 months ago
Regarding consistency levels, I found it helpful to frame each scenario in terms of latency versus data correctness to pick the right model.
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Sarah Johnson

5 months ago
One confusing style combined partitioning with indexing trade-offs, so you had to balance RU costs and query performance which tripped me up on DP-420.
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Edward Murphy

5 months ago
Another part that slowed me down was throughput planning since autoscale versus manual changes how you handle spikes and budget expectations.
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Chi

6 months ago
Design patterns for distributed apps in Cosmos DB were a maze. The practice tests highlighted which patterns fit which workload and showed how to model data properly; Pass4Success really prepared me.
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Earleen

6 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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Iluminada

6 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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Leanna

6 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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Pamella

7 months ago
The tricky questions about multi-region writes and conflict resolution were brutal. pass4success practice questions walked through conflict resolution strategies step by step, which helped me pick the right approach on exam day.
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Denny

7 months ago
The initial doubt about architectural patterns and throughput planning was real; pass4success clarified complex topics with practical labs and feedback that sparked confidence. Stay persistent and believe in your preparation—you'll excel!
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Jame

7 months ago
Aced the Microsoft Cosmos DB exam! Pass4Success made it possible with their up-to-date material. Thanks a bunch!
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Major

8 months ago
My nerves fluttered at the thought of Azure specifics and Cosmos DB internalization; Pass4Success gave me focused, exam-style practice and mentor-like guidance that steadied my nerves. Take a deep breath and push forward—success is within reach!
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Timmy

8 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!
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Johnathon

8 months ago
Before starting, I worried I wouldn't grasp distributed data management well enough; Pass4Success broke it into digestible chunks and simulated exams that built confidence. You've trained for this moment—go show them what you can do!
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Quentin

8 months ago
Passing the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam was a huge relief. The Pass4Success practice exams helped me identify and address my knowledge gaps.
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Maryann

8 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 consistency level for a global application. I wasn't completely confident, but I passed!
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Tina

9 months ago
I felt the squeeze of anxiety as the exam date approached, unsure I could apply cloud-native thinking under pressure; Pass4Success offered concise summaries and practical exercises that made the topics click. Believe in your study journey—you're on the right path!
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Page

9 months ago
Nervousness hit me hard during the initial prep, wondering if I could remember all the Azure Cosmos DB nuances; Pass4Success provided clear milestones, hands-on labs, and supportive feedback that boosted my belief in myself. Keep grinding—you're closer to success than you think!
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Bea

9 months ago
I was nervous before the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam, but the pass4success practice tests boosted my confidence. My advice? Revise thoroughly and trust your preparation.
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Teri

9 months ago
If you want to pass the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam, the Pass4Success practice exams are a must. Stay focused on the exam objectives, and you'll be golden.
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Coral

10 months 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 handle schema changes. Even though I was unsure, I succeeded!
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Johna

10 months ago
Acing the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam was so satisfying. One key tip? Manage your time wisely during the exam by practicing with Pass4Success.
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Raymon

10 months 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 Event Grid. I wasn't sure about the best way to handle event-driven architecture, but I still made it through.
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Dominic

10 months ago
Pass4Success practice exams were a game-changer for me. Don't underestimate the value of practicing with realistic questions - it really helped me identify my weak areas.
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Mauricio

11 months ago
Passing the Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam was a breeze with the Pass4Success practice exams. My top tip? Prioritize understanding the core concepts, not just memorizing.
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Esteban

11 months ago
I struggled with partitioning and throughput provisioning, especially when predicting RU/s for burst workloads. Pass4Success drills simulated the exact pricing and performance tradeoffs, so I could plan capacity confidently.
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Martina

11 months ago
The toughest part for me was understanding Cosmos DB consistency levels and how they impact latency and throughput; Pass4Success practice exams broke down scenarios clearly and mapped questions to real-world configurations, which finally made sense.
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Magnolia

11 months ago
Whew, that Cosmos DB cert was tough! Grateful for Pass4Success's relevant practice questions. Passed with flying colors!
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Hui

12 months 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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Brandon

12 months ago
Just passed the Azure Cosmos DB exam! Pass4Success's questions were spot-on. Thanks for the quick prep!
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Kaitlyn

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

1 year 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!
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Adelaide

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

1 year 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

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

1 year ago
Nailed the Microsoft Cosmos DB exam! Pass4Success's relevant questions were a huge time-saver.
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Alecia

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

2 years ago
Passed the Cosmos DB exam on my first try! Pass4Success's focused content made all the difference.
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Ressie

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

2 years 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

2 years ago
Microsoft Cosmos DB cert acquired! Couldn't have done it without Pass4Success's efficient study materials.
upvoted 0 times
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Rosalind

2 years 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!
upvoted 0 times
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Shawnta

2 years 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

2 years 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!
upvoted 0 times
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Laticia

2 years 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!
upvoted 0 times
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Wendell

2 years ago
Are there questions on optimizing query performance?
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Noemi

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

2 years 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

2 years ago
How about questions on monitoring and optimizing throughput?
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Gregg

2 years 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!
upvoted 0 times
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Sage

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

2 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

2 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

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

2 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.
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Matilda

2 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

2 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

2 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

2 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.
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Leota

2 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

2 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

2 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!
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Kattie

2 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

2 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 Sep. 21, 2026 (see below)

Question #1

You have an Azure Cosmos DB for NoSQL account that contains a database named DB1. Users run the following query against DB1.

You add an index to the recordset.

You need to change the ORDER by syntax of the query to optimize the use of the index. The solution must NOT change the result set.

Which syntax should you use?

Which syntax should you use?

Reveal Solution Hide Solution
Correct Answer: C

Question #2

You have an Azure Cosmos DB for NoSQL account that hosts a container named Container1.

You implement a change feed processor.

You discover that the processor is processing changes more slowly than the changes occur in Container1.

You need to resolve the issue.

What should you use?

Reveal Solution Hide Solution
Correct Answer: A

Question #3

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 #4

You have an Azure Cosmos DB Core (SQL) API account that uses a custom conflict resolution policy. The account has a registered merge procedure that throws a runtime exception.

The runtime exception prevents conflicts from being resolved.

You need to use an Azure function to resolve the conflicts.

What should you use?

Reveal Solution Hide Solution
Correct Answer: D

The Azure Cosmos DB Trigger uses the Azure Cosmos DB Change Feed to listen for inserts and updates across partitions. The change feed publishes inserts and updates, not deletions.


Question #5

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.


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