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The Microsoft DP-420 exam is an important certification for professionals who are involved in designing and implementing cloud-native applications using Azure Cosmos DB. This exam validates the candidate's skills and knowledge in designing, developing, and implementing cloud-native applications using Azure Cosmos DB, and demonstrates their expertise in this field. Candidates who pass this exam will be able to demonstrate their ability to design and implement cloud-native applications using Azure Cosmos DB, and will be well-prepared to take on new challenges in this rapidly evolving field.
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Achieving the Microsoft DP-420 certification demonstrates to employers and colleagues that a candidate has the skills and knowledge to design and implement cloud-native applications using Azure Cosmos DB. This certification is a valuable credential for professionals who want to advance their careers in cloud computing and data management.
The Microsoft DP-420 exam is aimed at professionals who are involved in designing and implementing cloud-native applications using Azure Cosmos DB. This includes solution architects, developers, and database administrators who are responsible for designing, developing, and implementing cloud-native applications using Azure Cosmos DB. Candidates who pass this exam will be able to demonstrate their skills and knowledge in designing and implementing cloud-native applications using Azure Cosmos DB.
Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions (Q30-Q35):
NEW QUESTION # 30
The following is a sample of a document in orders.
The orders container uses customerId as the partition key.
You need to provide a report of the total items ordered per month by item type. The solution must meet the following requirements:
Ensure that the report can run as quickly as possible.
Minimize the consumption of request units (RUs).
What should you do?
- A. Configure the report to query a new aggregate container. Populate the aggregates by using SQL queries that run daily.
- B. Configure the report to query orders by using a SQL query.
- C. Configure the report to query a new aggregate container. Populate the aggregates by using the change feed.
- D. Configure the report to query orders by using a SQL query through a dedicated gateway.
Answer: C
Explanation:
Explanation
You can facilitate aggregate data by using Change Feed and Azure Functions, and then use it for reporting.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/change-feed
NEW QUESTION # 31
You have an Azure Cosmos DB Core (SQL) API account that uses a custom conflict resolution policy. The account has a registered merge procedure that throws a runtime exception.
The runtime exception prevents conflicts from being resolved.
You need to use an Azure function to resolve the conflicts.
What should you use?
- A. a function that receives items pushed from the conflicts feed and is triggered by an Azure Cosmos DB trigger
- B. a function that pulls items from the change feed and is triggered by a timer trigger
- C. a function that receives items pushed from the change feed and is triggered by an Azure Cosmos DB trigger
- D. a function that pulls items from the conflicts feed and is triggered by a timer trigger
Answer: A
Explanation:
Topic 1, Litware, inc
Requirements
Planned Changes
Litware plans to implement a new Azure Cosmos DB Core (SQL) API account named account2 that will contain a database named iotdb. The iotdb database will contain two containers named con-iot1 and con-iot2.
Litware plans to make the following changes:
Store the telemetry data in account2.
Configure account1 to support multiple read-write regions.
Implement referential integrity for the con-product container.
Use Azure Functions to send notifications about product updates to different recipients.
Develop an app named App1 that will run from all locations and query the data in account1.
Develop an app named App2 that will run from the retail stores and query the data in account2. App2 must be limited to a single DNS endpoint when accessing account2.
Requirements. Business Requirements
Litware identifies the following business requirements:
Whenever there are multiple solutions for a requirement, select the solution that provides the best performance, as long as there are no additional costs associated.
Ensure that Azure Cosmos DB costs for IoT-related processing are predictable.
Minimize the number of firewall changes in the retail stores.
Requirements. Product Catalog Requirements
Litware identifies the following requirements for the product catalog:
Implement a custom conflict resolution policy for the product catalog data.
Minimize the frequency of errors during updates of the con-product container.
Once multi-region writes are configured, maximize the performance of App1 queries against the data in account1.
Trigger the execution of two Azure functions following every update to any document in the con-product container.
NEW QUESTION # 32
You plan to store order data in Azure Cosmos DB for NoSQL account. The data contains information about orders and their associated items.
You need to develop a model that supports order read operations. The solution must minimize the number or requests.
- A. Create a single database that contains one container. Store orders and order items in separate documents in the container.
- B. Create a single database that contains a container for order and a container for order items.
- C. Create a single database that contains one container. Create a separate document for each order and embed the order items into the order documents.
- D. Create a database for orders and a database for order items.
Answer: C
Explanation:
Explanation
Azure Cosmos DB is a multi-model database that supports various data models, such as documents, key-value, graph, and column-family3. The core content-model of Cosmos DB's database engine is based on atom-record-sequence (ARS), which allows it to store and query different types of data in a flexible and efficient way3.
To develop a model that supports order read operations and minimizes the number of requests, you should consider the following factors:
* The size and shape of your data
* The frequency and complexity of your queries
* The latency and throughput requirements of your application
* The trade-offs between storage efficiency and query performance
Based on these factors, one possible model that you could implement is B. Create a single database that contains one container. Create a separate document for each order and embed the order items into the order documents.
This model has the following advantages:
* It stores orders and order items as self-contained documents that can be easily retrieved by order ID1.
* It avoids storing redundant data or creating additional containers for order items1.
* It allows you to view the order history of a customer with simple queries1.
* It leverages the benefits of embedding data, such as reducing the number of requests, improving query performance, and simplifying data consistency2.
This model also has some limitations, such as:
* It may not be suitable for some order items that have data that is greater than 2 KB, as it could exceed the maximum document size limit of 2 MB2.
* It may not be optimal for scenarios where order items need to be queried independently from orders or aggregated by other criteria
* It may not support transactions across multiple orders or customers, as transactions are scoped to a single logical partition2.
Depending on your specific use case and requirements, you may need to adjust this model or choose a different one. For example, you could use a hybrid data model that combines embedding and referencing data2
, or you could use a graph data model that expresses entities and relationships as vertices and edges.
NEW QUESTION # 33
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. DocumentDB Account Contributor and Cosmos DB Built-in Data Contributor
- B. CosmosDB Operator only
- C. Cosmos DB Built-in Data Contributor only
- D. DocumentDB Account Contributor only
Answer: B
Explanation:
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
NEW QUESTION # 34
You have a database in an Azure Cosmos DB Core (SQL) API account.
You plan to create a container that will store employee data for 5,000 small businesses. Each business will have up to 25 employees. Each employee item will have an emailAddress value.
You need to ensure that the emailAddress value for each employee within the same company is unique.
To what should you set the partition key and the unique key? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Explanation
Box 1: CompanyID
After you create a container with a unique key policy, the creation of a new or an update of an existing item resulting in a duplicate within a logical partition is prevented, as specified by the unique key constraint. The partition key combined with the unique key guarantees the uniqueness of an item within the scope of the container.
For example, consider an Azure Cosmos container with Email address as the unique key constraint and CompanyID as the partition key. When you configure the user's email address with a unique key, each item has a unique email address within a given CompanyID. Two items can't be created with duplicate email addresses and with the same partition key value.
Box 2: emailAddress
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/unique-keys
NEW QUESTION # 35
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