DP-420 Practice Tests: Prepare for Build AI applications with Azure Cosmos DB Exam with Updated Materials

How to prepare for your Build AI applications with Azure Cosmos DB DP-420 exam? DumpsBase updated its DP-420 practice tests with 204 questions and answers, making your preparation more effective. It offers a PDF version, shows a software version as a free option, shares some free demo questions, and states that you receive one year of free update. These features make your DP-420 exam preparation easier to fit revision around your schedule.

What Changed in the DP-420 Exam?

On October 6, 2026, Microsoft updated the skills measured by DP-420 and changed the credential from Microsoft Certified: Azure Cosmos DB Developer Specialty to Microsoft Certified: Azure Cosmos DB AI Developer Associate. The exam code remains DP-420, but the full exam name has been changed as Building AI Applications with Azure Cosmos DB.

The current outline has three skill areas:

• Design and develop database solutions: 40–45%
• Secure, optimize, and deploy database solutions: 30–35%
• Implement AI and Analytics capabilities in database solutions: 20–25%

Data modeling, partitioning, SDK operations, and performance tuning remain part of the exam. The AI and analytics area covers full-text, vector, and hybrid search, RAG, agent memory, and Microsoft Fabric integration. The updated objectives also include Agent Kit and Fleet management. So when choosing your preparation resource, you must get the most updated DP-420 practice tests.

Make DumpsBase DP-420 Practice Tests Part of a Study Routine

The value of DP-420 practice tests comes from reviewing them carefully. Complete a set of questions, mark answers you guessed, and group your errors by topic. Spend the next study session on the concepts behind those errors, then try another set to see whether your reasoning has improved.

DumpsBase offers a simulated-software engine as well as a downloadable PDF for DP-420 practice tests. The PDF is useful for annotating questions and keeping revision notes; the software gives you another way to work through the material. Additionally, we will share one year of free updates from the purchase day.

Try 5 Free Demo Questions

Question 1

A SaaS team stores application events in an Azure Cosmos DB for NoSQL container partitioned by /tenantId. One tenant now has enough data that the team wants to distribute its events by project as well. Queries commonly specify both the tenant and project. How should the team adopt a hierarchical partition key of /tenantId and /projectId?
A. Increase the existing container’s provisioned throughput.
B. Add a composite index on tenantId and projectId.
C. Add a projectId property to every item and keep the container as it is.
D. Create a new container with the hierarchical partition key, then copy the items into it.
Answer: D
Explanation: Partition key paths are set when a container is created. A new container is required to use the hierarchical key, and the data must be moved to it. More throughput, a composite index, or an added property does not change the existing container’s partition key.

Question 2

Four workers use the Azure Cosmos DB change feed pull model to process changes from the same container. The application must assign a different portion of the feed to each worker so they can run in parallel. What should the coordinator give each worker?
A. The same continuation token for the whole container.
B. A distinct FeedRange for its change feed iterator.
C. A separate lease container for each worker.
D. The account’s session token.
Answer: B
Explanation: With the pull model, the application can obtain FeedRange values and assign different ranges to workers for parallel processing. A shared continuation token would not divide the work; lease containers belong to the change feed processor model, and session tokens control read consistency.

Question 3

In a product catalog, an application repeatedly performs point reads for the same items. It uses session consistency and can tolerate a short period of cached data. The team wants to lower the Request Unit (RU) charge for repeated reads without building an application cache. Which setup fits this need?
A. Enable the analytical store for the container.
B. Increase the container’s provisioned throughput.
C. Route the reads through a dedicated gateway endpoint in gateway mode to use the integrated cache.
D. Change the reads to strong consistency.
Answer: C
Explanation: The integrated cache runs on the dedicated gateway. Repeated point reads that hit the cache can have a zero-RU charge when the request meets the cache’s consistency and staleness conditions. Analytical storage, extra throughput, and strong consistency do not provide that cache behavior.

Question 4

An Azure Cosmos DB for NoSQL account currently uses periodic backups. The operations team needs to restore data to a chosen point within the configured retention period, rather than only to a periodic backup snapshot. Which change supports this requirement?
A. Migrate the account to continuous backup mode.
B. Increase the frequency of periodic backups.
C. Enable multi-region writes.
D. Add a Time to Live (TTL) policy to the containers.
Answer: A
Explanation: Continuous backup mode provides point-in-time restore within its retention tier, and an account can migrate from periodic to continuous backup. More frequent periodic snapshots still do not provide the same point-in-time capability. Multi-region writes and TTL address different needs.

Question 5

After a traffic spike, an operations team wants to identify which types of Azure Cosmos DB requests consumed the most RUs during the past hour. Which Azure Monitor metric and breakdown should they use?
A. Data Usage, grouped by container.
B. Total Requests, grouped by status code.
C. Normalized RU Consumption, grouped by region.
D. Total Request Units, grouped by operation type.
Answer: D
Explanation: The Total Request Units metric measures RU consumption and can be broken down by operation type. Data Usage measures storage, Total Requests counts requests, and Normalized RU Consumption shows throughput utilization rather than the RU total for each operation type.

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Include AI and Analytics in Your Final Review

The current DP-420 outline includes full-text, vector, and hybrid search; retrieval-augmented generation; agent memory; and operational analytics with Microsoft Fabric. These topics deserve a place in your review plan even if your earlier Azure Cosmos DB experience focused mainly on data modeling and queries.

In the final days, revisit questions you answered incorrectly or by guessing. Focus on explaining the requirements and tradeoffs behind each choice. Used alongside the skills measured of Microsoft DP-420 exam, DumpsBase DP-420 practice tests can provide a structured way to review your progress and prepare for unfamiliar exam scenarios.