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Microsoft DP-420 Exam Syllabus Topics:

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

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Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions (Q170-Q175):

NEW QUESTION # 170
You have an on-premises computer named Computer1 that runs Windows 11.
On Computer1, you install the Azure Cosmos DB Emulator by using the default settings.
You need to connect to the API for NoSQL clients hosted by the emulator.
What should you use?

Answer: B

Explanation:
Develop locally using the Azure Cosmos DB emulator
Create a new instance of CosmosClient using the emulator's credentials.
In C#
using CosmosClient client = new(
accountEndpoint: "https://localhost:8081/",
authKeyOrResourceToken:
"C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqy MsEcaGQy67XIw/Jw==" ); Reference:
https://learn.microsoft.com/en-us/azure/cosmos-db/how-to-develop-emulator


NEW QUESTION # 171
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 # 172
You have a container named container1 in an Azure Cosmos DB for NoSQL account named account1.
You configure container1 to use Always Encrypted by using an encryption policy as shown in the C# and the Java exhibits. (Click the C# tab to view the encryption policy in C#. Click the Java tab to see the encryption policy in Java.)


For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:


NEW QUESTION # 173
You have an Azure subscription that contains an Azure Cosmos DB for NoSQL account. You define and implement an encryption policy by using the following C# code.

For each of the following statements, select Yes if the statement is true, otherwise select No.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:

Explanation:


NEW QUESTION # 174
You have an Azure Cosmos DB for NoSQL account named account1 that has a single write region in the East US Azure region and read regions in the West Europe and Southeast Asia Azure regions. Service-managed failover is enabled, and the West Europe region is highest in the failover priority list.
You have an app named App1 that uses the Azure Cosmos DB .NET SDK.
You need to minimize how long it takes for App1 to resume writes after a regional outage. The solution must meet the following requirements:
- Ensure that read latency is optimized for the West Europe and
Southeast Asia regions.
- Minimize code changes for App1.
What should you do?

Answer: B

Explanation:
To satisfy all constraints, you should enable multi-region writes on the Azure Cosmos DB account
[assume this already done] and configure the ApplicationRegion property in the .NET SDK client initialization.
Resuming Writes Instantly: With multi-region writes enabled, every region becomes a valid write location. If the primary region experiences an outage, active-active capability prevents the database from performing a traditional database-level failover. This lowers write recovery time to zero since alternate regions can immediately ingest traffic.
*-> Optimized Read and Write Latency: Passing the ApplicationRegion property (e.g., Regions.WestEurope) to the SDK allows it to locate the nearest active geographic replica. This guarantees low-latency local reads and writes within West Europe and Southeast Asia.
*-> Minimal Code Changes: Instead of hardcoding complex prioritized lists via ApplicationPreferredRegions, setting the single ApplicationRegion string automatically creates an ordered fallback list behind the scenes based on geographic proximity.
Reference:
https://learn.microsoft.com/en-us/azure/cosmos-db/troubleshoot-dotnet-sdk-slow-request


NEW QUESTION # 175
......

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