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

Exam DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB has been designed for evaluating the skills and ability of the candidate to achieve technical tasks. The candidates for this exam are expected to have a strong foundation of knowledge and experience in developing apps for Azure and working with Azure Cosmos DB database technologies. The candidates are also expected to be proficient at developing applications with the use of Core(SQL) API and SDKs, efficient queries regarding writing and creating an appropriate index policy, provisioning and managing resources in Azure, how to create server-side objects with JavaScript. They should know to interpret JSON, read C# or Java code, and how to use PowerShell.

Roles and Responsibilities for Exam DP-420

Candidates pairing to take the exam are required to perform, the following tasks-

• Should know to design and implement data models and data distribution.
• Having the ability to load data into an Azure Cosmos DB database
• How to optimize and maintain the solution
• The process of integrating the solution with other Azure services
• The candidate should be able to design, implement, and monitor solutions that consider security, availability, resilience, and performance requirements.

Exam Objectives Content

• Design and implement data models (35–40%)
• Design and implement data distribution (5–10%)
• Integrate an Azure Cosmos DB solution (5–10%)
• Optimize an Azure Cosmos DB solution (15–20%)
• Maintain an Azure Cosmos DB solution (25–30%)

View Online Microsoft Certified: Azure Cosmos DB Developer Specialty DP-420 Free Questions

You have a container named container1 in an Azure Cosmos DB Core (SQL) API account.
You need to provide a user named User1 with the ability to insert items into container1 by using role-based access control (RBAC). The solution must use the principle of least privilege.
Which roles should you assign to User1?
A.CosmosDB Operator only
B.DocumentDB Account Contributor and Cosmos DB Built-in Data Contributor
C.DocumentDB Account Contributor only
D.Cosmos DB Built-in Data Contributor only
Answer:A

You need to select the partition key for con-iot1. The solution must meet the IoT telemetry requirements.
What should you select?
A.the timestamp
B.the humidity
C.the temperature
D.the device ID
Answer:D

You need to implement a trigger in Azure Cosmos DB Core (SQL) API that will run before an item is inserted into a container.
Which two actions should you perform to ensure that the trigger runs? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
A.Append pre to the name of the JavaScript function trigger.
B.For each create request, set the access condition in RequestOptions.
C.Register the trigger as a pre-trigger.
D.For each create request, set the consistency level to session in RequestOptions.
E.For each create request, set the trigger name in RequestOptions.
Answer : C

You have an application named App1 that reads the data in an Azure Cosmos DB Core (SQL) API account. App1 runs the same read queries every minute. The default consistency level for the account is set to eventual.
You discover that every query consumes request units (RUs) instead of using the cache.
You verify the IntegratedCacheiteItemHitRate metric and the IntegratedCacheQueryHitRate metric. Both metrics have values of 0.
You verify that the dedicated gateway cluster is provisioned and used in the connection string.
You need to ensure that App1 uses the Azure Cosmos DB integrated cache.
What should you configure?
A.the indexing policy of the Azure Cosmos DB container
B.the consistency level of the requests from App1
C.the connectivity mode of the App1 CosmosClient
D.the default consistency level of the Azure Cosmos DB account
Answer : C

You need to provide a solution for the Azure Functions notifications following updates to con-product. The solution must meet the business requirements and the product catalog requirements.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
A.Configure the trigger for each function to use a different leaseCollectionPrefix
B.Configure the trigger for each function to use the same leaseCollectionNair.e
C.Configure the trigger for each function to use a different leaseCollectionName
D.Configure the trigger for each function to use the same leaseCollectionPrefix
Answer : A, B