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

DP-420 real exams

Exam Code: DP-420

Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB

Updated: Oct 30, 2026

Q & A: 206 Questions and Answers

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  • Number of Questions: 40-60
  • The passing scores: 70%
  • Languages: English
  • Time Duration: 60 minutes

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Reference: https://docs.microsoft.com/en-us/learn/certifications/exams/dp-420?WT.mc_id=Azure_blog-wwl

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Microsoft DP-420 Exam Syllabus Topics:

SectionObjectives
Topic 1: Design and implement data models for Azure Cosmos DB- Model data for NoSQL workloads
  • 1. Data modeling patterns (embed vs reference)
    • 2. Partitioning strategies
      - Design indexing strategies
      • 1. Query optimization considerations
        • 2. Indexing policies
          Topic 2: Design and implement data distribution- Partitioning and scaling
          • 1. Logical and physical partitions
            • 2. Throughput (RU/s) planning
              - Replication and consistency
              • 1. Multi-region replication
                • 2. Consistency levels
                  Topic 3: Optimize and maintain Cosmos DB solutions- Monitoring and troubleshooting
                  • 1. Diagnostics and logging
                    • 2. Alerts and metrics
                      - Performance optimization
                      • 1. RU consumption optimization
                        • 2. Query performance tuning
                          Topic 4: Integrate Azure Cosmos DB with Azure services- Data pipelines and analytics
                          • 1. Data movement patterns
                            • 2. Synapse integration
                              - Event-driven architectures
                              • 1. Integration with Azure Functions
                                • 2. Change Feed processing

                                  Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions:

                                  Question #1

                                  You are designing three apps named App1, App2, and App3. Each app will use a separate Azure Cosmos DB for NoSQL account. The apps have the following consistency requirements:
                                  * App1: Reads must always return the most recent committed version of an item, where the commit occurred during the same session.
                                  * App2: Reads must always return the most recent committed version of an item, even if the commit occurred during another session.
                                  * App3: Write latency must be minimized and data staleness can be tolerated.
                                  You need to recommend a default consistency level for each Azure Cosmos DB for NoSQL account. The solution must maximize concurrency.
                                  What should you recommend for the account of each app? To answer, drag the appropriate consistency levels to the correct apps. Each consistency level may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
                                  NOTE: Each correct selection is worth one point.

                                  Reveal Solution  Discussion  0

                                  Correct Answer:


                                  Explanation:

                                  Question #2

                                  You have an Azure Cosmos DB for NoSQL account named account1.
                                  You have an app named App1 that connects to account1 and uses strong consistency for all requests.
                                  You implement the Azure Cosmos DB integrated cache for account1.
                                  You need to ensure that App1 uses the integrated cache.
                                  What should you do?

                                  • A. Set the connectivity mode to direct mode over TCP.
                                  • B. Change the request consistency level to session.
                                  • C. Change the request consistency level to bounded staleness.
                                  • D. Set MaxIntegratedCacheStaleness to 0.
                                  Reveal Solution  Discussion  0

                                  Correct Answer: B  🗳️

                                  Question #3

                                  You have an Azure Synapse Analytics workspace named workspace1 that contains a server less SQL pool.
                                  You have an Azure Table Storage account that stores operational data.
                                  You need to replace the Table storage account with Azure Cosmos DB for NoSQL The solution must meet the following requirements:
                                  * Support Queries from the server less SQL pool.
                                  * Only pay for analytical compute when running queries.
                                  * Ensure that analytical processes do
                                  NOTE: affect operational processes.
                                  Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

                                  Reveal Solution  Discussion  0

                                  Correct Answer:


                                  Explanation:

                                  Question #4

                                  You have three containers in an Azure Cosmos DB Core (SQL) API account as shown in the following table.

                                  You have the following Azure functions:
                                  A function named Fn1 that reads the change feed of cn1
                                  A function named Fn2 that reads the change feed of cn2
                                  A function named Fn3 that reads the change feed of cn3
                                  You perform the following actions:
                                  Delete an item named item1 from cn1.
                                  Update an item named item2 in cn2.
                                  For an item named item3 in cn3, update the item time to live to 3,600 seconds.
                                  For each of the following statements, select Yes if the statement is true. Otherwise, select No.
                                  NOTE: Each correct selection is worth one point.

                                  Reveal Solution  Discussion  0

                                  Correct Answer:


                                  Explanation:

                                  Box 1: No
                                  Azure Cosmos DB ' s change feed is a great choice as a central data store in event sourcing architectures where all data ingestion is modeled as writes (no updates or deletes).
                                  Note: The change feed does not capture deletes. If you delete an item from your container, it is also removed from the change feed. The most common method of handling this is adding a soft marker on the items that are being deleted. You can add a property called " deleted " and set it to " true " at the time of deletion. This document update will show up in the change feed. You can set a TTL on this item so that it can be automatically deleted later.
                                  Box 2: No
                                  The _etag format is internal and you should not take dependency on it, because it can change anytime.
                                  Box 3: Yes
                                  Change feed support in Azure Cosmos DB works by listening to an Azure Cosmos container for any changes.
                                  Reference:
                                  https://docs.microsoft.com/en-us/azure/cosmos-db/sql/change-feed-design-patterns
                                  https://docs.microsoft.com/en-us/azure/cosmos-db/change-feed

                                  Question #5

                                  You have an Azure subscription that contains the resources shown in the following table.

                                  You need to configure the sink connector for KafkaConnect1 to deliver messages from Topic1 to Container1.
                                  How should you configure the value converter for the sink connector? To answer, select the appropriate options in the answer area.
                                  NOTE: Each correct selection is worth one point.

                                  Reveal Solution  Discussion  0

                                  Correct Answer:


                                  Explanation:

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