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DP-420 Practice Questions

Question # 1

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.

Option A

B.

Option B

C.

Option C

D.

Option D



B.

Option B


D.

Option D


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



Question # 2

You have an Azure Cosmos DB Core (SQL) API account named account1.
In account1, you run the following query in a container that contains 100GB of data.
SELECT *
FROM c
WHERE LOWER(c.categoryid) = "hockey"
You view the following metrics while performing the query.



Question # 3

The settings for a container in an Azure Cosmos DB Core (SQL) API account are
configured as shown in the following exhibit.

Which statement describes the configuration of the container?

A.

All items will be deleted after one year.

B.

Items stored in the collection will be retained always, regardless of the items time to live
value.

C.

Items stored in the collection will expire only if the item has a time to live value.

D.

All items will be deleted after one hour.



C.

Items stored in the collection will expire only if the item has a time to live value.


When DefaultTimeToLive is -1 then your Time to Live setting is On (No default)
Time to Live on a container, if present and the value is set to "-1", it is equal to infinity, and
items don’t expire by default.
Time to Live on an item:
This Property is applicable only if DefaultTimeToLive is present and it is not set to null for
the parent container.
If present, it overrides the DefaultTimeToLive value of the parent container.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/time-to-live



Question # 4

You have a container named container1 in an Azure Cosmos DB Core (SQL) API account. Upserts of items in container1 occur every three seconds.
You have an Azure Functions app named function1 that is supposed to run whenever items
are inserted or replaced in container1.
You discover that function1 runs, but not on every upsert.
You need to ensure that function1 processes each upsert within one second of the upsert.
Which property should you change in the Function.json file of function1?

A.

checkpointInterval

B.

leaseCollectionsThroughput

C.

maxItemsPerInvocation

D.

feedPollDelay



D.

feedPollDelay


Explanation:
With an upsert operation we can either insert or update an existing record at the same
time.
FeedPollDelay: The time (in milliseconds) for the delay between polling a partition for new
changes on the feed, after all current changes are drained. Default is 5,000 milliseconds, or
5 seconds.
Reference: https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindingscosmosdb-
v2-trigger



Question # 5

You have an Azure Cosmos DB Core (SQL) API account that is configured for multi-region
writes. The account contains a database that has two containers named container1 and
container2.
The following is a sample of a document in container1:
{
"customerId": 1234,
"firstName": "John",
"lastName": "Smith",
"policyYear": 2021
}
The following is a sample of a document in container2:
{
"gpsId": 1234,
"latitude": 38.8951,
"longitude": -77.0364
}
You need to configure conflict resolution to meet the following requirements:
For container1 you must resolve conflicts by using the highest value for policyYear.
For container2 you must resolve conflicts by accepting the distance closest to latitude:
40.730610 and longitude: -73.935242.
Administrative effort must be minimized to implement the solution.
What should you configure for each container? To answer, drag the appropriate
configurations to the correct containers. Each configuration may be used once, more than
once, or not at all. You may need to drag the split bar between panes or scroll to view
content.
NOTE: Each correct selection is worth one point.



Question # 6

You have a container named container1 in an Azure Cosmos DB Core (SQL) API account.
You need to provide a user named User1 with the ability to insert items into container1 by
using role-based access control (RBAC). The solution must use the principle of least
privilege.
Which roles should you assign to User1?

A.

CosmosDB Operator only

B.

DocumentDB Account Contributor and Cosmos DB Built-in Data Contributor

C.

DocumentDB Account Contributor only

D.

Cosmos DB Built-in Data Contributor only



A.

CosmosDB Operator only


Explanation:
Cosmos DB Operator: Can provision Azure Cosmos accounts, databases, and containers.
Cannot access any data or use Data Explorer.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/role-based-access-control



Question # 7

You plan to create an Azure Cosmos DB Core (SQL) API account that will use customermanaged
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.

A.

Wrap Key

B.

Get

C.

List

D.

Update

E.

Sign



A.

Wrap Key


B.

Get



Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/how-to-setup-cmk



Question # 8

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



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


Explanation:
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



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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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