Free DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Exam Questions and Answers
Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB is exam DP-420, part of Microsoft Certifications. Microsoft exam codes name the solution area rather than the level — AZ for Azure, DP for data, MS for Microsoft 365, PL for Power Platform, SC for security, AI for Azure AI — with one reliable rule: any exam numbered 900 or 901 is Fundamentals. Every technical exam is scored from 1 to 1000 with 700 to pass, a scaled score Microsoft notes is explicitly not 70% of the marks.
The first 10 questions on this page are free to read, answers included — no account and no card. A plan opens the rest of the bank, the full timed practice test and your weak-topic reporting.
Last updated: September 20, 2026
- Exam code
- DP-420
- Provider
- Microsoft
- Questions in our bank
- 1000+
- Free to read
- First 10, with answers
- Official page
- Official Exam website
- Our test mode duration & pass mark
- 130 mins · 70%
Recommended: Switch to Test Mode to start a practice test that simulates the real exam experience.
Question #1
You need to select the partition key for con-iot1. The solution must meet the IoT telemetry requirements. What should you select?
Please select an optionIncorrectCorrect answer: D
The partition key is what will determine how data is routed in the various partitions by Cosmos DB and needs to make sense in the context of your specific scenario. The IoT Device ID is generally the "natural" partition key for IoT applications. Scenario: The iotdb database will contain two containers named con-iot1 and con-iot2. Ensure that Azure Cosmos DB costs for IoT-related processing are predictable. Reference: https://docs.microsoft.com/en-us/azure/architecture/solution-ideas/articles/iot-using-cosmos-db
Was this answer correct?Question #2
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?
Please select an optionIncorrectCorrect answer: C
App1 queries the con-product and con-productVendor containers. Note: Request unit is a performance currency abstracting the system resources such as CPU, IOPS, and memory that are required to perform the database operations supported by Azure Cosmos DB. Scenario: Develop an app named App1 that will run from all locations and query the data in account1. Once multi-region writes are configured, maximize the performance of App1 queries against the data in account1. Whenever there are multiple solutions for a requirement, select the solution that provides the best performance, as long as there are no additional costs associated. Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/consistency-levels
Was this answer correct?Question #3
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You have an Azure Cosmos DB Core (SQL) API account named account 1 that uses autoscale throughput. You need to run an Azure function when the normalized request units per second for a container in account1 exceeds a specific value. Solution: You configure the function to have an Azure CosmosDB trigger. Does this meet the goal?
Please select an optionIncorrectCorrect answer: B
Instead configure an Azure Monitor alert to trigger the function. You can set up alerts from the Azure Cosmos DB pane or the Azure Monitor service in the Azure portal. Reference: https://docs.microsoft.com/en- us/azure/cosmos-db/create-alerts
Was this answer correct?Question #4
You have the following query. SELECT * FROM WHERE c.sensor = "TEMP1" AND c.value < 22 AND c.timestamp >= 1619146031231 You need to recommend a composite index strategy that will minimize the request units (RUs) consumed by the query. What should you recommend?
Please select an optionIncorrectCorrect answer: A
If a query has a filter with two or more properties, adding a composite index will improve performance. Consider the following query: SELECT * FROM c WHERE c.name = “Tim” and c.age > 18 In the absence of a composite index on (name ASC, and age ASC), we will utilize a range index for this query. We can improve the efficiency of this query by creating a composite index for name and age. Queries with multiple equality filters and a maximum of one range filter (such as >,<, <=, >=, !=) will utilize the composite index. Reference: https://azure.microsoft.com/en-us/blog/three-ways-to-leverage-composite-indexes-in-azure-cosmos-db/
Was this answer correct?Question #5
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You have a container named container1 in an Azure Cosmos DB Core (SQL) API account. You need to make the contents of container1 available as reference data for an Azure Stream Analytics job. Solution: You create an Azure Data Factory pipeline that uses Azure Cosmos DB Core (SQL) API as the input and Azure Blob Storage as the output. Does this meet the goal?
Please select an optionIncorrectCorrect answer: A
Instead create an Azure function that uses Azure Cosmos DB Core (SQL) API change feed as a trigger and Azure event hub as the output. The Azure Cosmos DB change feed is a mechanism to get a continuous and incremental feed of records from an Azure Cosmos container as those records are being created or modified. Change feed support works by listening to container for any changes. It then outputs the sorted list of documents that were changed in the order in which they were modified. The following diagram represents the data flow and components involved in the solution: C:\Users\Admin\Desktop\Data\Odt data\Untitled.jpg Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/changefeed-ecommerce-solution
Was this answer correct?Question #6
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen. You have a container named container1 in an Azure Cosmos DB Core (SQL) API account. You need to make the contents of container1 available as reference data for an Azure Stream Analytics job. Solution: You create an Azure function that uses Azure Cosmos DB Core (SQL) API change feed as a trigger and Azure event hub as the output. Does this meet the goal?
Please select an optionIncorrectCorrect answer: B
The Azure Cosmos DB change feed is a mechanism to get a continuous and incremental feed of records from an Azure Cosmos container as those records are being created or modified. Change feed support works by listening to container for any changes. It then outputs the sorted list of documents that were changed in the order in which they were modified. The following diagram represents the data flow and components involved in the solution: C:\Users\Admin\Desktop\Data\Odt data\Untitled.jpg Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/changefeed-ecommerce-solution
Was this answer correct?Question #7
You plan to create an Azure Cosmos DB Core (SQL) API account that will use customer-managed keys stored in Azure Key Vault. You need to configure an access policy in Key Vault to allow Azure Cosmos DB access to the keys. Which three permissions should you enable in the access policy? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
Select 3 answers.
Please select an optionIncorrectCorrect answer: A, B, G
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/how-to-setup-cmk
Was this answer correct?Question #8
You are designing an Azure Cosmos DB Core (SQL) API solution to store data from IoT devices. Writes from the devices will be occur every second. The following is a sample of the data. You need to select a partition key that meets the following requirements for writes: Minimizes the partition skew Avoids capacity limits Avoids hot partitions What should you do?
Please select an optionIncorrectCorrect answer: D
Use a partition key with a random suffix. Distribute the workload more evenly is to append a random number at the end of the partition key value. When you distribute items in this way, you can perform parallel write operations across partitions. Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/synthetic-partition-keys
Was this answer correct?Question #9
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.
Select 2 answers.
Please select an optionIncorrectCorrect answer: C, E
C: When triggers are registered, you can specify the operations that it can run with. F: When executing, pre-triggers are passed in the RequestOptions object by specifying PreTriggerInclude and then passing the name of the trigger in a List object. Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/how-to-use-stored-procedures-triggers-udfs
Was this answer correct?Question #10
You have a database in an Azure Cosmos DB Core (SQL) API account. The database is backed up every two hours. You need to implement a solution that supports point-in-time restore. What should you do first?
Please select an optionIncorrectCorrect answer: A
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/provision-account-continuous-backup
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FAQ
Learn More: https://learn.microsoft.com/en-us/credentials/
- Q1: What is the DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam?
- A: DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB is a Microsoft certification exam. Judging by the questions in our bank, it concentrates on cosmos, azure, consistency, query and writes.
- Q2: What topics does the DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam cover?
- A: Questions in our DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB bank cluster around cosmos, azure, consistency, query, writes and throughput. Working through the full set is the quickest way to find which of these you are weakest on.
- Q3: How should I prepare for DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB?
- A: Work through the DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB practice questions here, checking your answer on each one, then sit the practice test to rehearse the exam under timed conditions before the real thing.
- Q4: Are these real DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam questions?
- A: They are drawn from officially released past questions and from community members who have sat DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB. Answers are verified and updated weekly.
- Q5: Where do I register for the DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB exam?
- A: Register through Microsoft directly at https://learn.microsoft.com/en-us/credentials/. Exampractice is not affiliated with Microsoft and does not administer the exam.
- Q6: Is there a free DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB sample?
- A: Yes. Every DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB page shows a free sample of real questions. Upgrading opens the full bank and the practice test.
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