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  • Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
  • Last Update: Jul 13, 2025
  • Questions and Answers: 144
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DP-420 Practice Exam Questions with Answers Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Certification

Question # 6

You have an app that stores data in an Azure Cosmos DB Core (SQL) API account The app performs queries that return large result sets.

You need to return a complete result set to the app by using pagination. Each page of results must return 80 items.

Which three 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.

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Question # 7

You need to configure an Apache Kafka instance to ingest data from an Azure Cosmos DB Core (SQL) API account. The data from a container named telemetry must be added to a Kafka topic named iot. The solution must store the data in a compact binary format.

Which three configuration items should you include in the solution? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

A.

"connector.class": "com.azure.cosmos.kafka.connect.source.CosmosDBSourceConnector"

B.

"key.converter": "org.apache.kafka.connect.json.JsonConverter"

C.

"key.converter": "io.confluent.connect.avro.AvroConverter"

D.

"connect.cosmos.containers.topicmap": "iot#telemetry"

E.

"connect.cosmos.containers.topicmap": "iot"

F.

"connector.class": "com.azure.cosmos.kafka.connect.source.CosmosDBSinkConnector"

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Question # 8

You have an Azure Cosmos DB for NoSQL account that contains a database named DB1 and a container named Container1. You need to manage the account by using the Azure Cosmos DB SDK. What should you do?

A.

List the physical partitions of Container1.

B.

Read a stored procedure in Container1.

C.

Create a user defined function (UDF) in Container1.

D.

Create a container in DB1.

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Question # 9

You have an Azure Cosmos DB Core (SQL) API account that is used by 10 web apps.

You need to analyze the data stored in the account by using Apache Spark to create machine learning models. The solution must NOT affect the performance of the web apps.

Which two actions should you perform? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

A.

In an Apache Spark pool in Azure Synapse, create a table that uses cosmos.olap as the data source.

B.

Create a private endpoint connection to the account.

C.

In an Azure Synapse Analytics serverless SQL pool, create a view that uses OPENROWSET and the CosmosDB provider.

D.

Enable Azure Synapse Link for the account and Analytical store on the container.

E.

In an Apache Spark pool in Azure Synapse, create a table that uses cosmos.oltp as the data source.

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Question # 10

You plan to create an Azure Cosmos DB for NoSQL account that will have a single write region and three read regions. You need to set the consistency level for the account. The solution must meet the following requirements:

• In the write region, writes must replicate synchronously across at least three replicas.

• In the read regions, reads must see writes in order for transactional batches.

• Throughput for reads and writes must be maximized.

Which consistency level should you select?

A.

Eventual

B.

Bounded Staleness

C.

Consistent Prefix

D.

Strong

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Question # 11

You are creating a database in an Azure Cosmos DB Core (SQL) API account. The database will be used by an application that will provide users with the ability to share online posts. Users will also be able to submit comments on other users' posts.

You need to store the data shown in the following table.

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The application has the following characteristics:

Users can submit an unlimited number of posts.

The average number of posts submitted by a user will be more than 1,000.

Posts can have an unlimited number of comments from different users.

The average number of comments per post will be 100, but many posts will exceed 1,000 comments.

Users will be limited to having a maximum of 20 interests.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

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Question # 12

You have an Azure subscription that contains an Azure Cosmos DB for NoSQL account named account1.

Backups for account1 have the following configurations:

• Interval: 2 hours

• Retention period: 4 days

You need to estimate the charges associated with the retention of the backups. How many copies of the backups will incur additional charges?

A.

8

B.

12

C.

46

D.

48

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Question # 13

You have a database named db1in an Azure Cosmos DB for NoSQL account named account 1.

You need to write JSON data to db1 by using Azure Stream Analytics. The solution must minimize costs.

Which should you do before you can use db1 as an output of Stream Analytics?

A.

in account, add a private endpoint.

B.

In db1, create containers that have a custom indexing policy and analytical store disabled.

C.

In account, enable a dedicated gateway.

D.

In db1, create containers that have an automatic indexing policy and analytical store enabled.

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Question # 14

You have an Azure subscription that contains an Azure Cosmos DB for NoSQL account named accounts

You configure account! to send resource logs to Log Analytics.

You need to identify any containers in account1 that were deleted during the past 24 hours.

How should you complete the query? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

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Question # 15

Vou have an Azure subscription. The subscription contains an Azure Cosmos DB for NoSQL account named account1 that hosts a container named Customers. Multi-region writes are allowed.

You execute the following C# code.

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For each of the following statements, Select Yes if the statement is true, Otherwise, select No.

NOTE: Each correct selection is worth one point.

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Question # 16

You have three containers in an Azure Cosmos DB Core (SQL) API account as shown in the following table.

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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.

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Question # 17

You have the Azure Cosmos DB for NoSQL containers shown in the following table.

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You have the items shown in the following table.

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When will each item expire? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

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Question # 18

You have a container named container1 in an Azure Cosmos DB Core (SQL) API account. The container1 container has 120 GB of data.

The following is a sample of a document in container1.

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The orderId property is used as the partition key.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

NOTE: Each correct selection is worth one point.

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Question # 19

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

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Question # 20

You need to select the capacity mode and scale configuration for account2 to support the planned changes and meet the business requirements. What should you select? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

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Question # 21

You need to identify which connectivity mode to use when implementing App2. The solution must support the planned changes and meet the business requirements.

Which connectivity mode should you identify?

A.

Direct mode over HTTPS

B.

Gateway mode (using HTTPS)

C.

Direct mode over TCP

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Question # 22

You need to recommend indexes for con-product and con-productVendor. The solution must meet the product catalog requirements and the business requirements.

Which type of index should you recommend for each container? To answer, select the appropriate options in the answer area.

NOTE: Each correct selection is worth one point.

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