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New Microsoft Certified: Azure Cosmos DB Developer Specialty DP-420 Exam Practice Questions

Total 128 Questions

Last Updated On: 3-Oct-2024

Question # 1

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

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 # 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

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

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

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

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

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?
A. Yes
B. No

Explanation:
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 # 7

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.

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

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