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DP-420 Practice Questions

Question # 1

You plan to deploy two Azure Cosmos DB Core (SQL) API accounts that will each contain
a single database. The accounts will be configured as shown in the following table.


Question # 2

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 Synapse pipeline that uses Azure Cosmos DB Core (SQL)
API as the input and Azure Blob Storage as the output.
Does this meet the goal?

 

A.

Yes

B.

No



B.

No


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:

Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/changefeedecommerce-
solution


Question # 3

You have a database in an Azure Cosmos DB Core (SQL) API account.
You need to create an Azure function that will access the database to retrieve records
based on a variable named accountnumber. The solution must protect against SQL
injection attacks.
How should you define the command statement in the function?

A.

cmd = "SELECT * FROM Persons p
WHERE p.accountnumber = 'accountnumber'"

B.

cmd = "SELECT * FROM Persons p
WHERE p.accountnumber = LIKE @accountnumber"

C.

cmd = "SELECT * FROM Persons p
WHERE p.accountnumber = @accountnumber"

D.

cmd = "SELECT * FROM Persons p
WHERE p.accountnumber = '" + accountnumber + "'"



C.

cmd = "SELECT * FROM Persons p
WHERE p.accountnumber = @accountnumber"


Explanation:
Azure Cosmos DB supports queries with parameters expressed by the familiar @ notation.
Parameterized SQL provides robust handling and escaping of user input, and prevents
accidental exposure of data through SQL injection.
For example, you can write a query that takes lastName and address.state as parameters,
and execute it for various values of lastName and address.state based on user input.
SELECT *
FROM Families f
WHERE f.lastName = @lastName AND f.address.state = @addressState
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/sql-queryparameterized-
queries


Question # 4

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



C.

the connectivity mode of the App1 CosmosClient


Explanation: Because the integrated cache is specific to your Azure Cosmos DB account
and requires significant CPU and memory, it requires a dedicated gateway node. Connect
to Azure Cosmos DB using gateway mode.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/integrated-cache-faq


Question # 5

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.


Question # 6

You have the indexing policy shown in the following exhibit.


Question # 7

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 an Azure Monitor alert to trigger the function.
Does this meet the goal?

A.

Yes

B.

No



A.

Yes


Explanation:
You can set up alerts from the Azure Cosmos DB pane or the Azure Monitor service in the
Azure portal.
Note: Alerts are used to set up recurring tests to monitor the availability and
responsiveness of your Azure Cosmos DB resources. Alerts can send you a notification in
the form of an email, or execute an Azure Function when one of your metrics reaches the
threshold or if a specific event is logged in the activity log.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/create-alerts


Question # 8

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?

A.

Yes

B.

No



A.

Yes


Explanation:
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:

Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/changefeedecommerce-
solution


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Microsoft DP-420 Exam Dumps

Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Certification Name: Microsoft Certified: Azure Cosmos DB Developer Specialty

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