DP-420 Practice Online

Question 1

Azure Cosmos DB comes in 2 different capacity modes that are provisioned throughput and serverless.

i). Which of these modes is best suited for Workloads having sustained traffic that require predictable performance?

ii). For which mode, Geo distribution is unavailable?

A : i) provisioned throughput and ii) Serverlessright

B : i) Serverless and ii) Provisioned throughput

C : i) Provisioned throughput and ii) Provisioned throughput

D : i) Serverless and ii) Serverless

Answer: A

Question 2

You need to implement a solution to meet the product catalog requirements. What should you do to implement the conflict resolution policy.

A : Remove frequently changed field from the index policy of the con-product container.

B : Disable indexing on all fields in the index policy of the con-product container.

C : Set the default consistency level for account1 to eventual.

D : Create a new container and migrate the product catalog data to the new container.

Answer: D

Question 3

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?

A : a composite index for (sensor ASC, value ASC) and a composite index for (sensor ASC, timestamp ASC)

B : a composite index for (sensor ASC, value ASC, timestamp ASC) and a composite index for (sensor DESC, value DESC, timestamp DESC)

C : a composite index for (value ASC, sensor ASC) and a composite index for (timestamp ASC, sensor ASC)

D : a composite index for (sensor ASC, value ASC, timestamp ASC)

Answer: A

Question 4

You are designing an Azure Cosmos DB for NoSQL solution to store data from IoT devices. Writes from the devices will occur every second. Data will be retained indefinitely.

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 timestamp as the partition key.

B : Create a new synthetic key that contains deviceId and sensor1Value.

C : Create a new synthetic key that contains deviceId and deviceManufacturer.

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

Answer: B

Question 5

The below diagram illustrates the configuration settings for a container in an Azure Cosmos DB Core (SQL) API account.

Which of the following statements rightly describes the container’s configuration?

A : All the items will be deleted after 1 hour

B : All the items will be deleted after 1 month

C : Items will be expired only if they have a time to live valueright

D : Items stored in containers will get retained always, regardless of the time to live value of the items

Answer: C

Name:	Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Exam Code:	DP-420
Certification:	Microsoft Certified Azure Cosmos DB Developer Specialty
Vendor:	Microsoft
Total Questions:	291
Last Updated:	Oct 24, 2026

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