Quiz 2026 DP-420: Accurate Exam Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Labs

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Microsoft DP-420 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Maintain an Azure Cosmos DB solution25-30%- Monitor and troubleshoot Azure Cosmos DB solutions
  • 1. Troubleshoot throughput issues
  • 2. Monitor metrics and logs
  • 3. Monitor performance and availability
  • 4. Implement backup and recovery strategies
Topic 2: Design and implement data distribution5-10%- Design and implement multi-region writes
  • 1. Choose when to use multi-region writes
  • 2. Implement conflict resolution policies
  • 3. Implement multi-region writes
- Design and implement replication strategy
  • 1. Perform manual failovers
  • 2. Choose a consistency model
  • 3. Choose when to distribute data
  • 4. Evaluate consistency model impacts
  • 5. Define automatic failover policies
Topic 3: Optimize an Azure Cosmos DB solution15-20%- Define and implement indexing strategy
  • 1. Optimize index performance
  • 2. Configure custom indexing policies
  • 3. Choose read-heavy or write-heavy indexing
  • 4. Choose appropriate index types
  • 5. Implement composite indexes
- Optimize query performance
  • 1. Retrieve request unit cost
  • 2. Calculate query cost
  • 3. Implement integrated cache
  • 4. Adjust indexing policies
- Design and implement change feeds
  • 1. Manage change feed instances
  • 2. Implement aggregation persistence
  • 3. Develop Azure Functions triggers
  • 4. Consume change feeds using SDK
Topic 4: Design and implement data models35-40%- Implement client connectivity options
  • 1. Configure client-side threading and logging
  • 2. Handle connection errors
  • 3. Create database connections
  • 4. Implement singleton client
  • 5. Choose gateway or direct connectivity mode
  • 6. Use Azure Cosmos DB emulator
- Implement server-side programming
  • 1. Implement user-defined functions
  • 2. Write and deploy stored procedures
  • 3. Implement triggers
- Plan and implement sizing and scaling
  • 1. Design resource governance and scaling
  • 2. Choose between serverless, provisioned, and free tier
  • 3. Configure throughput
  • 4. Evaluate global distribution costs
  • 5. Evaluate throughput and storage requirements
- Design and implement a non-relational data model for Azure Cosmos DB for NoSQL
  • 1. Denormalize data across documents
  • 2. Reference between documents
  • 3. Store multiple entity types in the same container
  • 4. Identify data and associated access patterns
  • 5. Store multiple related entities in the same document
  • 6. Identify partition key, id, and unique keys
- Design a data partitioning strategy
  • 1. Implement synthetic partition keys
  • 2. Evaluate throughput and data distribution
  • 3. Choose a partition key
  • 4. Choose a partitioning strategy
  • 5. Evaluate cross-partition query cost
  • 6. Plan for transactions with partition keys
- Implement data access
  • 1. Implement SQL queries with arrays and aggregation
  • 2. Use SDKs for CRUD operations
  • 3. Manage transactional batch operations
  • 4. Use consistency and query request options
  • 5. Implement patch operations
  • 6. Implement optimistic concurrency control
Topic 5: Integrate an Azure Cosmos DB solution5-10%- Implement solutions across services
  • 1. Aggregate and archive data
  • 2. Enforce referential integrity
  • 3. Use Change Feed for denormalization
  • 4. Implement Azure AI Search integration
  • 5. Integrate Azure Functions and Event Hubs
- Enable analytical workloads
  • 1. Configure Azure Cosmos DB Mirroring
  • 2. Query analytical store from Synapse
  • 3. Write data back from Spark
  • 4. Enable analytical store

>> Exam DP-420 Labs <<

100% Pass 2026 Microsoft Professional Exam DP-420 Labs

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Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions (Q11-Q16):

NEW QUESTION # 11
Drag and Drop Question
You have an Azure subscription that contains an Azure Cosmos DB for NoSQL account. The account contains a database named DB1 and an Azure Key Vault named KV1.
You need to create a container named Container1 in DB1. The solution must ensure that the properties of the items in container1 are encrypted by using Always Encrypted.
Which four 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.

Answer:

Explanation:


NEW QUESTION # 12
You have a container in an Azure Cosmos DB Core (SQL) API account.
You need to use the Azure Cosmos DB SDK to replace a document by using optimistic concurrency.
What should you include in the code? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:

Reference:
https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.cosmos.itemrequestoptions
https://cosmosdb.github.io/labs/dotnet/labs/10-concurrency-control.html


NEW QUESTION # 13
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 a container named container1 in an Azure Cosmos DB Core (SQL) API account.
You need to make the contents of container1 available as reference data for an Azure Stream Analytics job.
Solution: You create an Azure Synapse pipeline that uses Azure Cosmos DB Core (SQL) API as the input and Azure Blob Storage as the output.
Does this meet the goal?

Answer: B

Explanation:
Instead create an Azure function that uses Azure Cosmos DB Core (SQL) API change feed as a trigger and Azure event hub as the output.
The Azure Cosmos DB change feed is a mechanism to get a continuous and incremental feed of records from an Azure Cosmos container as those records are being created or modified. Change feed support works by listening to container for any changes. It then outputs the sorted list of documents that were changed in the order in which they were modified.
The following diagram represents the data flow and components involved in the solution:


NEW QUESTION # 14
You have an Azure Cosmos DB Core (SQL) API account that is configured for multi-region writes. The account contains a database that has two containers named container1 and container2.
The following is a sample of a document in container1:
{
"customerId": 1234,
"firstName": "John",
"lastName": "Smith",
"policyYear": 2021
}
The following is a sample of a document in container2:
{
"gpsId": 1234,
"latitude": 38.8951,
"longitude": -77.0364
}
You need to configure conflict resolution to meet the following requirements:
For container1 you must resolve conflicts by using the highest value for policyYear.
For container2 you must resolve conflicts by accepting the distance closest to latitude: 40.730610 and longitude: -73.935242.
Administrative effort must be minimized to implement the solution.
What should you configure for each container? To answer, drag the appropriate configurations to the correct containers. Each configuration 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.

Answer:

Explanation:

Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/conflict-resolution-policies
https://docs.microsoft.com/en-us/azure/cosmos-db/sql/how-to-manage-conflicts


NEW QUESTION # 15
You plan to implement con-iot1 and con-iot2.
You need to configure the default Time to Live setting for each container. The solution must meet the loT telemetry requirements.
What should you configure? To answer, select the appropriate options in the answer NOTE: Each correct selection is worth one point.

Answer:

Explanation:

Explanation:
Box 1 =On (no default)
For con-iot1, you need to configure the default TTL setting to On (no default), which means that items in this container do not expire by default, but you can override the TTL value on a per-item basis. This meets the requirement of retaining all telemetry data unless overridden1.
Box 2 = On (3600 seconds)
For con-iot2, you need to configure the default TTL setting to On (3600 seconds), which means that items in this container will expire 3600 seconds (one hour) after their last modified time. This meets the requirement of deleting all telemetry data older than one hour1.


NEW QUESTION # 16
......

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