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


"Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB", also known as DP-420 exam, is a Microsoft Certification. With the complete collection of questions and answers, Pass4sureCert has assembled to take you through 206 Q&As to your DP-420 Exam preparation. In the DP-420 exam resources, you will cover every field and category in Azure Cosmos DB Developer Specialty Certification helping to ready you for your successful Microsoft Certification.

  • Exam Code: DP-420
  • Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
  • Total Questions: 206

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Skills measured

  • The English language version of this exam will be updated on August 4, 2022. Please download the exam skills outline below to see what’s changing.
  • Integrate an Azure Cosmos DB solution (5–10%)
  • Maintain an Azure Cosmos DB solution (25–30%)
  • Design and implement data models (35–40%)
  • Design and implement data distribution (5–10%)
  • Optimize an Azure Cosmos DB solution (15–20%)

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

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

Candidates for this exam must have solid knowledge and experience developing apps for Azure and working with Azure Cosmos DB database technologies. They should be proficient at developing applications by using the Core (SQL) API and SDKs, writing efficient queries and creating appropriate index policies, provisioning and managing resources in Azure, and creating server-side objects with JavaScript. They should be able to interpret JSON, read C# or Java code, and use PowerShell.

The English language version of this exam will be updated on August 4, 2022. Please download the skills measured document below to see what’s changing. If a localized version of this exam is available, it will be updated approximately eight weeks after this date.

Passing score: 700. Learn more about exam scores.

Part of the requirements for: Microsoft Certified: Azure Cosmos DB Developer Specialty

Download exam skills outline

Microsoft DP-420 Exam Syllabus Topics:

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

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

You have an Azure Cosmos DB database that contains a container named container 1. The container1 container is configured with a maximum of 20,000 RU/s and currently contains 240 GB of data.
You need to estimate the costs of container1 based on the current usage.
How many RU/s will be charged?

  • A. 20,000
  • B. 24000
  • C. 4.000
  • D. 240
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

You have an Azure subscription that contains an Azure Cosmos DB for NoSQL account named account! You plan to configure the Apache Kafka service as a data source for account 1. What should you use to store the Kafka configuration?

  • A. Apache Tomcat
  • B. Apache Gremlin
  • C. ApacheZooKeeper
  • D. Azure Key Vault
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

You need to implement a solution to meet the product catalog requirements.
What should you do to implement the conflict resolution policy.

  • A. Set the default consistency level for account1 to eventual.
  • B. Remove frequently changed field from the index policy of the con-product container.
  • C. Disable indexing on all fields in the index policy of the con-product container.
  • D. Create a new container and migrate the product catalog data to the new container.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Vou have an Azure Cosmos DB for NoSQL account that hosts a container named Container1. Contained has analytical store enabled, analytical TTL is set to 7 flays.
An application performs frequent updates to Container 1 and uses TTL to remove expired items.
Vou plan to build an incremental export from Container! to a downstream sink by using change data capture (CDC) in the analytical store and running the export from Azure Data Factory mapping data flows- You need to configure CDC to meet the following requirement!
* The first run must include only changes from the last three days.
* The RUs required to perform the first run must be minimized.
* Subsequent runs must capture inserts updates, deletes, and TTL operations.
* The process must NOT rely on custom checkpoints based on the _is property, Which CDC start option should you configure for the source?

  • A. Start from a specific timestamp set to now. and configure the pipeline to backfill the previous three days by querying the analytical store with a _is fitter
  • B. Start from a specific timestamp set to three days ago.
  • C. Start from the beginning, and set the dataflow to write rows only where the CDC operation time is within the last three days.
  • D. Start from the beginning, and set analytical TTL to 3 days so that the first CDC read contains only the last three days.
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

You configure multi-region writes for account1.
You need to ensure that App1 supports the new configuration for account1. The solution must meet the business requirements and the product catalog requirements.
What should you do?

  • A. Increase the number of request units per second (RU/s) allocated to the con-product and con- productVendor containers.
  • B. Create a private endpoint connection.
  • C. Set the default consistency level of accountl to bounded staleness.
  • D. Modify the connection policy of App1.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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