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Microsoft DP-420 Exam Syllabus Topics:

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

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DP-420 Prüfungsressourcen: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB & DP-420 Reale Fragen

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Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB DP-420 Prüfungsfragen mit Lösungen (Q40-Q45):

40. Frage
Hotspot Question
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.

Antwort:

Begründung:

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


41. Frage
You plan to create an Azure Cosmos DB database named db1 that will contain two containers. One of the containers will contain blog posts, and the other will contain users. Each item in the blog post container will include:
* A single blog post
* All the comments associated to the blog post
* The names of the users who created the blog post and added the comments.
You need to design a solution to update usernames m the user container without causing data integrity issues.
The solution must minimize administrative and development effort. What should you include in the solution?
To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

Antwort:

Begründung:

Explanation:


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

Antwort: D


43. Frage
You have an Azure Cosmos DB for NoSQL account named account that has the disablekeyBasedletadatwriteAccess property enabled.
You are developing an app named App1 that will be used by a use1 named DevUser1 to create containers in account1. DevUser1 has a non-privileged user account in the Azure AD tenant.
You need to ensure that DevUser1 can use App1 to create containers in account1.
What should you do? To answer, select the appropriate options in the answer area.
NOTE Each correct selection is worth one point.

Antwort:

Begründung:

Explanation:


44. Frage
You have a database in an Azure Cosmos DB SQL API Core (SQL) account that is used for development.
The database is modified once per day in a batch process.
You need to ensure that you can restore the database if the last batch process fails. The solution must minimize costs.
How should you configure the backup settings? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

Antwort:

Begründung:

Explanation:


45. Frage
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