How To Study: Updated Microsoft DP-420 Exam

Microsoft officially updated the new DP-420 Azure Cosmos DB Developer Specialty exam on April 25, 2024. That’s why I want to share with you the reasons for how to study for the updated exam.

To study and prepare for the Microsoft DP-420 exam, this article will share some online resources (mainly Microsoft Docs and Microsoft Learn) that the exam changes as well as the latest DP-420 practice questions. You will find information on how I prepared for the Microsoft DP-420 exam in this article.

Contain:

What is the updated Microsoft DP-420 exam like
How to prepare for the updated Microsoft DP-420
New resource sharing for the new Microsoft DP-420 exam
The latest DP-420 mock practice questions
Achieve your dreams and have a successful career

Updated Microsoft DP-420 exam

Microsoft DP-420: Designing and Implementing Cloud-Native Applications with Microsoft Azure Cosmos DB exam, and successful completion of the exam will lead to Microsoft Certified: Azure Cosmos DB Developer Specialization. The DP-420 exam is a Microsoft exam related to Azure Cosmos DB that specializes in the design, integration, optimization, and maintenance of Azure DB.

The exam will consist of 40-60 questions. The DP-420 exam has a minimum passing score of 700. And, this DP-420 exam can be taken in English, Japanese, Chinese (Simplified), Korean, German, French, Spanish, Portuguese (Brazil), Arabic (Saudi Arabia), Russian, Chinese (Traditional), Italian, and Indonesian (Indonesia). The cost of this exam is $165.

All know that it is essential to be familiar with the exam objectives and the skills to measure. Then you need to pay more attention to the updated exam objectives and skills.

Exam Objectives:

Subject matter expertise in designing, implementing, and monitoring cloud-native applications that store and manage data.
You can integrate the solution with other Azure services. You can also design, implement, and monitor solutions that take into account security, availability, resiliency, and performance requirements.
Should be proficient in developing applications that use the Azure Cosmos DB for NoSQL API. You should also be familiar with configuring and managing resources in Azure.

Skill:

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%)

You should also pay attention to the chart below, the content of the exam changes

The picture is a comparison between the two versions of the test skills measure, and the third column depicts the extent of the change. You need to study it carefully.

The above is excerpted from: https://learn.microsoft.com/en-us/credentials/certifications/resources/study-guides/dp-420

How to prepare for the updated Azure Cosmos DB Developer Specialty DP-420

If you are sure that you want to take the updated DP-420 exam, you should do the following:

Learn about the exam content, read and measure the exam content (objectives and measurement skills, and changes in content before and after comparisons), which you can find on Microsoft Docs and Microsoft Learn.
Understand the exam format and question types. Microsoft doesn’t mention the specific exam format question types on the exam, but you can find them on practice tests (official or third-party).
Take a free hands-on learning course on Microsoft Learn. It’s free!
Hands-on experience, through practical experience of practical technology.
Participate in courses and trainings, such as LinkedIn Learning, Pluralsight, etc
Use books to learn and prepare, you can go to Microsoft Press to see
Take a mock test, which is the last and most important point. It is highly recommended that you take mock exams to test your preparation with practice questions. You can find the free DP-420 practice test below in this article.

New resource sharing for the new Microsoft DP-420 exam

To cope with the updated exam, a batch of new DP-420 resources have been prepared to share with you, with links to facilitate your learning. After all, the exam has been updated, and with it, the DP-420 learning resources must also be updated to be effective.

Book:

Documentation:

Take the latest DP-420 practice questions online for free

Practice exams are essential for better preparation because they allow you to assess your strengths and weaknesses. You can start taking the mock test for the Pass4itSure free DP-420 exam, and doing so, will not only help you analyze or evaluate yourself, but also improve your answering skills, allowing you to save a lot of time.

From	Questions
Pass4itSure	1-15

Question 1:

HOTSPOT

You have an Azure Cosmos DB Core (SQL) API account used by an application named App1.

You open the Insights pane for the account and see the following chart.

Use the drop-down menus to select the answer choice that answers each question based on the information presented in the graphic.

NOTE: Each correct selection is worth one point.

Hot Area:

Correct Answer:

Box 1: incorrect connection URLs

400 Bad Request: Returned when there is an error in the request URI, headers, or body. The response body will contain an error message explaining what the specific problem is.

The HyperText Transfer Protocol (HTTP) 400 Bad Request response status code indicates that the server cannot or will not process the request due to something that is perceived to be a client error (for example, malformed request syntax,

invalid request message framing, or deceptive request routing).

Box 2: 6 thousand

201 Created: Success on PUT or POST. An object created or updated successfully.

Note:

200 OK: Success on GET, PUT, or POST. Returned for a successful response.

404 Not Found: Returned when a resource does not exist on the server. If you are managing or querying an index, check the syntax and verify the index name is specified correctly.

Reference:

https://docs.microsoft.com/en-us/rest/api/searchservice/http-status-codes

Question 2:

You are designing an Azure Cosmos DB Core (SQL) API solution to store data from IoT devices. Writes from the devices will 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?

A. Use timestamps for the partition key.

B. Create a new synthetic key that contains devices and sensor1Value.

C. Create a new synthetic key that contains devices and device manufacturers.

D. Create a new synthetic key that contains devices and a random number.

Correct Answer: D

Use a partition key with a random suffix. Distribute the workload more evenly by appending 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.

Incorrect Answers:

A: You will also not like to partition the data on “DateTime”, because this will create a hot partition. Imagine you have partitioned the data on time, and then for a given minute, all the calls will hit one partition. If you need to retrieve the data for a customer, then it will be a fan-out query because data may be distributed on all the partitions.

B: Senser1Value has only two values.

C: All the devices could have the same manufacturer.

Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/synthetic-partition-keys

Question 3:

You have a container in an Azure Cosmos DB for a NoSQL account. You need to create an alert based on a custom Log Analytics query. Which signal type should you use?

A. Log

B. Metrics

C. Activity Log

D. Resource Health

Correct Answer: A

Explanation:

You can receive an alert based on the metrics, activity log events, or Analytics logs on your Azure Cosmos DB account:

*-> Log Analytics logs– This alert triggers when the value of a specified property in the results of a Log Analytics query crosses a threshold you assign. For example, you can write a Log Analytics query to monitor if the storage for a logical partition key is reaching the 20 GB logical partition key storage limit in Azure Cosmos DB.

Incorrect:

Metrics – The alert triggers when the value of a specified metric crosses a threshold you assign. For example, when the total request units consumed exceed 1000 RU/s. This alert is triggered both when the condition is first met and then afterwards when that condition is no longer being met.

Activity log events – This alert triggers when a certain event occurs. For example, when the keys of your Azure Cosmos DB account are accessed or refreshed.

Reference:

https://learn.microsoft.com/en-us/azure/cosmos-db/create-alerts

Question 4:

You have a container m an Azure Cosmos DB for a NoSQL account.

Data update volumes are unpredictable.

You need to process the change of the container by using a web app that has multiple instances. The change feed will be processed by using the change feed processor from the Azure Cosmos DB SDK. The multiple instances must share the workload.

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

NOTE: Each correct selection is worth one point.

A. Configure the same processor name for all the instances.

B. Configure a different processor name for each instance.

C. Configure a different lease container configuration for each instance.

D. Configure the same instance name for all the instances. 13

E. Configure a different instance name for each instance.

F. Configure the same lease container configuration for all the instances.

Correct Answer: AEF

Question 5:

You have an Azure Cosmos DB for a NoSQL account named account1.

You need to create a container named Container1 in account1 by using the Azure Cosmos DB .NET SDK. The solution must ensure that the items in Container 1 never expire.

What should you set?

A. TimeToLivePropertyPath to null

B. TimeToLivePropertyPath to 0

C. DefaultTimeToLive to null

D. DefaultTimeToLive to –1

Correct Answer: D

Explanation:

Time to live for containers and items

The time to live value is set in seconds, and it is interpreted as a delta from the time that an item was last modified. You can set time to live on a container or an item within the container:

Time to Live on a container (set using DefaultTimeToLive):

If missing (or set to null), items do not expire automatically.

If present and the value is set to “-1”, it is equal to infinity, and items don\’t expire by default.

If present and the value is set to some non-zero number “n” – items will expire “n” seconds after their last modified time.

Reference:

https://learn.microsoft.com/en-us/azure/cosmos-db/nosql/time-to-live

Question 6:

You have a container in an Azure Cosmos DB Core (SQL) API account. The container stores telemetry data from IoT devices. The container uses telemetry as the partition key and has a throughput of 1,000 request units per second (RU/s).

Approximately 5,000 IoT devices submit data every five minutes by using the same telemetry value.

You have an application that performs analytics on the data and frequently reads telemetry data for a single IoT device to perform trend analysis.

The following is a sample of a document in the container.

You need to reduce the amount of request units (RUs) consumed by the analytics application. What should you do?

A. Decrease the offerThroughputvalue for the container.

B. Increase the offerThroughputvalue for the container.

C. Move the data to a new container that has a partition key of deviceId.

D. Move the data to a new container that uses a partition key of date.

Correct Answer: C

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.

Reference: https://docs.microsoft.com/en-us/azure/architecture/solution-ideas/articles/iot-using-cosmos-db

Question 7:

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.

A collection that contains aggregated data already exists. The following is a sample document:

{

“name”: “apple”,

“type”: [“fruit”, “exotic”],

“orders”: 10000

}

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. Option A

B. Option B

C. Option C

D. Option D

Correct Answer: BD

ARRAY_CONTAINS returns a Boolean indicating whether the array contains the specified value. You can check for a partial or full match of an object by using a boolean expression within the command. Incorrect Answers:

A: Default sorting ordering is Ascending. Must use Descending order.

C: Order on Orders not on Type.

Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/sql-query-array-contains

Question 8:

You have an Azure Cosmos DB for NoSQL account named account1 that supports an application named App1. App1 uses the consistent prefix consistency level.

You configure account to use a dedicated gateway and integrated cache.

You need to ensure that App1 can use the integrated cache.

Which two actions should you perform for APP1? Each correct answer presents part of the solution.

NOTE: Each correct selection is worth one point.

A. Change the connection mode to direct

B. Change the account endpoint to https://account1.sqlx.cosmos.azure.com.

C. Change the consistency level of requests to strong.

D. Change the consistency level of session requests.

E. Change the account endpoint to https://account1.documents.azure.com

Correct Answer: BD

the Azure Cosmos DB integrated cache is an in-memory cache that is built- into the Azure Cosmos DB dedicated gateway. The dedicated gateway is a front-end computer that stores cached data and routes requests to the backend database.

You can choose from a variety of dedicated gateway sizes based on the number of cores and memory needed for your workload1. The integrated cache can reduce the RU consumption and latency of read operations by serving them from the cache instead of the backend containers2.

For your scenario, to ensure that App1 can use the integrated cache, you should perform these two actions:

Change the account endpoint to https://account1.sqlx.cosmos.azure.com. This is the dedicated gateway endpoint that you need to use to connect to your Azure Cosmos DB account and leverage the integrated cache. The standard gateway endpoint (https://account1.documents.azure.com) will not use the integrated cache2.

Change the consistency level of session requests. This is the highest consistency level that is supported by the integrated cache. If you use a higher consistency level (such as strong or bounded staleness), your requests will bypass the integrated cache and go directly to the backend containers

Question 9:

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 account exceeds a specific value.

Solution: You configure an application to use the change feed processor to read the change feed and you configure the application to trigger the function.

Does this meet the goal?

A. Yes

B. No

Correct 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

Question 10:

You have an Azure Cosmos DB Core (SQL) API account.

You configure the diagnostic settings to send all log information to a Log Analytics workspace.

You need to identify when the provisioned request units per second (RU/s) for resources within the account were modified.

You write the following query.

AzureDiagnostics

| where Category == “ControlPlaneRequests”

What should you include in the query?

A. | where OperationName starts “AccountUpdateStart”

B. | where OperationName starts “SqlContainersDelete”

C. | where OperationName starts “MongoCollectionsThroughputUpdate”

D. | where OperationName starts “SqlContainersThroughputUpdate”

Correct Answer: A

The following are the operation names in diagnostic logs for different operations:

1.RegionAddStart, RegionAddComplete

2.RegionRemoveStart, RegionRemoveComplete

3.AccountDeleteStart, AccountDeleteComplete

4.RegionFailoverStart, RegionFailoverComplete

5.AccountCreateStart, AccountCreateComplete

6.AccountUpdateStart*, AccountUpdateComplete

7.VirtualNetworkDeleteStart, VirtualNetworkDeleteComplete

8.DiagnosticLogUpdateStart, DiagnosticLogUpdateComplete

Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/audit-control-plane-logs

Question 11:

You need to provide a solution for the Azure Functions notifications following updates to the 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 leaseCollectionName

C. Configure the trigger for each function to use a different leaseCollectionName

D. Configure the trigger for each function to use the same leaseCollectionPrefix

Correct Answer: AB

leaseCollectionPrefix: when set, the value is added as a prefix to the leases created in the Lease collection for this Function. Using a prefix allows two separate Azure Functions to share the same Lease collection by using different prefixes.

Scenario: Use Azure Functions to send notifications about product updates to different recipients.

Trigger the execution of two Azure functions following every update to any document in the con-product container.

Reference:

https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-cosmosdb-v2-trigger

Question 12:

Your company develops an application named App1 that uses the Azure Cosmos DB SDK and the Eventual consistency level.

App1 queries an Azure Cosmos DB for a NoSQL account named account1.

You need to identify which consistency level to assign to App1 to meet the following requirements:

Maximize the throughput of the queries generated by App1 without increasing the number of request units currently used by the queries.

Provide the highest consistency guarantees.

Which consistency level should you identify?

A. Strong

B. Bounded Staleness

C. Session

D. Consistent Prefix

Correct Answer: D

Reference: https://learn.microsoft.com/en-us/azure/cosmos-db/consistency-levels

Question 13:

You have an Azure Cosmos DB for a NoSQL account.

You need to create an Azure Monitor query that lists recent modifications to the regional failover policy.

Which Azure Monitor table should you query?

A. CDBPartitionKeyStatistics

B. CDBQueryRunTimeStatistics

C. CDBDataPlaneRequests

D. CDBControlPlaneRequests

Correct Answer: D

Question 14:

You have a database in an Azure Cosmos DB for a NoSQL account that is configured for multi-region writes.

You need to use the Azure Cosmos DB SDK to implement the conflict resolution policy for a container. The solution must ensure that any conflict is sent to the conflict feed.

Solution: You set ConfilictResolutionMode to Custom and you use the default settings for the policy.

Does this meet the goal?

A. Yes

B. No

Correct Answer: B

Setting ConflictResolutionMode to Custom and using the default settings for the policy will not ensure that conflicts are sent to the conflict feed. You need to define a custom stored procedure using the “conflictingItems” parameter to handle conflicts properly.

Question 15:

You have an Azure Cosmos DB for NoSQL account named account1 that has a single read-write region and one additional read region.

Account1 uses the strong default consistency level.

You have an application that uses the eventual consistency level when submitting requests to the account.

How will writes from the application be handled?

A. Writes will use a strong consistency level.

B. Azure Cosmos DB will reject writes from the application.

C. The write order is not guaranteed during replication.

D. Writes will use the eventual consistency level.

Correct Answer: A

This is because the write concern is mapped to the default consistency level configured on your Azure Cosmos DB account, which is strong in this case. Strong consistency ensures that every write operation is synchronously committed to every region associated with your Azure Cosmos DB account. The eventual consistency level that the application uses only applies to the read operations. Eventual consistency offers higher availability and better performance, but it does not guarantee the order or latency of the reads.

Pass4itSure’s latest DP-420 practice questions Q&As: 117

Stay tuned for the last updated DP-420 exam questions, we update the exam questions from time to time.

Achieve your dreams and have a successful career

Cloud-native applications have revolutionized the way businesses operate, providing scalability, flexibility, and cost-effectiveness. As more organizations adopt cloud-native architectures, the demand for professionals with Cosmos DB development skills is skyrocketing. Gaining expertise in Cosmos DB with the Microsoft DP-420 exam allows you to position yourself as a sought-after professional in the job market.

There are 532 Azure Cosmos DB jobs available on Indeed.com. For data engineers, software architects, Java developers, and more!

6figr.com website provides data: Azure Cosmos Db salary, with an average salary of Rs 2.23 lakh.
Glassdoor website data: In the United States, the average salary for an Azure developer is $141,798 per year.

It can be seen that it is feasible to get certified and get a high-paying job.

At last

I hope reading the full article will give you an idea of how to prepare for and pass the updated Microsoft DP-420 exam. Use Pass4itSure DP-420 practice questions https://www.pass4itsure.com/dp-420.html (PDF+VCE) to achieve your dreams, get a high salary, and have a wonderful career. It’s also important to note that exams are subject to change and so should the way you prepare, and you may need to modify your DP-420 exam preparation method based on the latest developments to get the most out of your efforts.

Good luck with the exams.

Updated Microsoft DP-420 exam

Exam Objectives:

Skill:

You should also pay attention to the chart below, the content of the exam changes

How to prepare for the updated Azure Cosmos DB Developer Specialty DP-420

New resource sharing for the new Microsoft DP-420 exam

Take the latest DP-420 practice questions online for free

Question 1:

Question 2:

Question 3:

Question 4:

Question 5:

Question 6:

Question 7:

Question 8:

Question 9:

Question 10:

Question 11:

Question 12:

Question 13:

Question 14:

Question 15:

Achieve your dreams and have a successful career

At last

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