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

Here you have the best Microsoft DP-420 practice exam questions

  • You have 194 total questions across 39 pages (5 per page)
  • These questions were last updated on March 6, 2026
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Question 1 of 194
HOTSPOT -
You have an Azure Cosmos DB Core (SQL) API account named account1 that has the disableKeyBasedMetadataWriteAccess property enabled.
You are developing an app named App1 that will be used by a user named DevUser1 to create containers in account1. DevUser1 has a non-privileged user account in the Azure Active Directory (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.
Hot Area:
Exam DP-420: Question 1 - Image 1
Answer

Suggested Answer

Box 1: Resource tokens -
Resource tokens provide access to the application resources within a database. Resource tokens:
Provide access to specific containers, partition keys, documents, attachments, stored procedures, triggers, and UDFs.
Box 2: Azure Resource Manager API
You can use Azure Resource Manager to help deploy and manage your Azure Cosmos DB accounts, databases, and containers.
Incorrect Answers:
The Microsoft Graph API is a RESTful web API that enables you to access Microsoft Cloud service resources.
Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/secure-access-to-data https://docs.microsoft.com/en-us/rest/api/resources/ Exam DP-420: Question 1 - Image 2
Question 2 of 194
HOTSPOT -
You have an Azure Cosmos DB Core (SQL) account that has a single write region in West Europe.
You run the following Azure CLI script.
Exam DP-420: Question 2 - Image 1
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Hot Area:
Exam DP-420: Question 2 - Image 2
Answer

Suggested Answer

Box 1: Yes -
The Automatic failover option allows Azure Cosmos DB to failover to the region with the highest failover priority with no user action should a region become unavailable.

Box 2: No -
West Europe is used for failover. Only North Europe is writable.
To Configure multi-region set UseMultipleWriteLocations to true.

Box 3: Yes -
Provisioned throughput with single write region costs $0.008/hour per 100 RU/s and provisioned throughput with multiple writable regions costs $0.016/per hour per 100 RU/s.
Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/sql/how-to-multi-master https://docs.microsoft.com/en-us/azure/cosmos-db/optimize-cost-regions Exam DP-420: Question 2 - Image 3
Question 3 of 194
You are developing an application that will use an Azure Cosmos DB Core (SQL) API account as a data source.
You need to create a report that displays the top five most ordered fruits as shown in the following table.
Exam DP-420: Question 3 - Image 1
A collection that contains aggregated data already exists. The following is a sample document:
Exam DP-420: Question 3 - Image 2
Which two queries can you use to retrieve data for the report? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
A.
Exam DP-420: Question 3 - Image 3
B.
Exam DP-420: Question 3 - Image 4
C.
Exam DP-420: Question 3 - Image 5
D.
Exam DP-420: Question 3 - Image 6
Answer

Suggested Answer

To create a report that displays the top five most ordered fruits from an Azure Cosmos DB Core (SQL) API account, we need to ensure that the queries filter out the fruits correctly and order the results by the number of orders in descending order. The two queries that meet these requirements are B and D. Query B uses the WHERE EXISTS clause to filter the items where the 'types' array contains 'fruit' and orders the results by 'orders' in descending order. Query D uses the ARRAY_CONTAINS function to achieve the same filtering and also orders the results by 'orders' in descending order. Both queries will return the desired data for the report.

Question 4 of 194
HOTSPOT -
You have a database in an Azure Cosmos DB Core (SQL) API account.
You plan to create a container that will store employee data for 5,000 small businesses. Each business will have up to 25 employees. Each employee item will have an emailAddress value.
You need to ensure that the emailAddress value for each employee within the same company is unique.
To what should you set the partition key and the unique key? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:
Exam DP-420: Question 4 - Image 1
Answer

Suggested Answer

Box 1: CompanyID -
After you create a container with a unique key policy, the creation of a new or an update of an existing item resulting in a duplicate within a logical partition is prevented, as specified by the unique key constraint. The partition key combined with the unique key guarantees the uniqueness of an item within the scope of the container.
For example, consider an Azure Cosmos container with Email address as the unique key constraint and CompanyID as the partition key. When you configure the user's email address with a unique key, each item has a unique email address within a given CompanyID. Two items can't be created with duplicate email addresses and with the same partition key value.

Box 2: emailAddress -
Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/unique-keys Exam DP-420: Question 4 - Image 2
Question 5 of 194
HOTSPOT -
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.
Exam DP-420: Question 5 - Image 1
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.
Hot Area:
Exam DP-420: Question 5 - Image 2
Answer

Suggested Answer

Box 1: Yes -
Records with different OrderIDs will match.

Box 2: Yes -
Records with different OrderIDs will match.

Box 3: No -
Only records with one specific OrderId will match Exam DP-420: Question 5 - Image 3

About the Microsoft DP-420 Certification Exam

About the Exam

The Microsoft DP-420 (Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 194 practice questions across 39 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our DP-420 questions are regularly updated to reflect the latest exam objectives.