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Microsoft DP-420 Exam Syllabus Topics:

SectionObjectives
Design and implement data models for Azure Cosmos DB- Model data for NoSQL workloads
  • 1. Partitioning strategies
    • 2. Data modeling patterns (embed vs reference)
      - Design indexing strategies
      • 1. Query optimization considerations
        • 2. Indexing policies
          Integrate Azure Cosmos DB with Azure services- Event-driven architectures
          • 1. Change Feed processing
            • 2. Integration with Azure Functions
              - Data pipelines and analytics
              • 1. Synapse integration
                • 2. Data movement patterns
                  Design and implement data distribution- Replication and consistency
                  • 1. Multi-region replication
                    • 2. Consistency levels
                      - Partitioning and scaling
                      • 1. Logical and physical partitions
                        • 2. Throughput (RU/s) planning
                          Optimize and maintain Cosmos DB solutions- Monitoring and troubleshooting
                          • 1. Alerts and metrics
                            • 2. Diagnostics and logging
                              - Performance optimization
                              • 1. Query performance tuning
                                • 2. RU consumption optimization

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                                  Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions (Q253-Q258):

                                  NEW QUESTION # 253
                                  You have an Azure subscription.
                                  You need to deploy the following resources to an Azure Cosmos DB for NoSQL account:
                                  * A container
                                  * A user-defined function (UDF)
                                  The solution must minimize the possibility of the deployment failing.
                                  How should you complete the template? To answer, select the appropriate options in the answer area.
                                  NOTE: Each correct selection is worth one point.

                                  Answer:

                                  Explanation:


                                  NEW QUESTION # 254
                                  You have an Azure Cosmos DB Core (SQL) API account named storage1 that uses provisioned throughput capacity mode.
                                  The storage1 account contains the databases shown in the following table.

                                  The databases contain the containers shown in the following table.

                                  For each of the following statements, select Yes if the statement is true. Otherwise, select No.
                                  NOTE: Each correct selection is worth one point.

                                  Answer:

                                  Explanation:

                                  Explanation

                                  Box 1: No
                                  Four containers with 1000 RU/s each.
                                  Box 2: No
                                  Max 8000 RU/s for db2. 8 containers, so 1000 RU/s for each container.
                                  Box 3: Yes
                                  Max 8000 RU/s for db2. 8 containers, so 1000 RU/s for each container. Can very well add an additional container.
                                  Reference:
                                  https://docs.microsoft.com/en-us/azure/cosmos-db/plan-manage-costs
                                  https://azure.microsoft.com/en-us/pricing/details/cosmos-db/


                                  NEW QUESTION # 255
                                  You are creating a database in an Azure Cosmos DB Core (SQL) API account. The database will be used by an application that will provide users with the ability to share online posts. Users will also be able to submit comments on other users' posts.
                                  You need to store the data shown in the following table.

                                  The application has the following characteristics:
                                  Users can submit an unlimited number of posts.
                                  The average number of posts submitted by a user will be more than 1,000.
                                  Posts can have an unlimited number of comments from different users.
                                  The average number of comments per post will be 100, but many posts will exceed 1,000 comments.
                                  Users will be limited to having a maximum of 20 interests.
                                  For each of the following statements, select Yes if the statement is true. Otherwise, select No.
                                  NOTE: Each correct selection is worth one point.

                                  Answer:

                                  Explanation:

                                  Explanation

                                  Box 1: Yes
                                  Non-relational data increases write costs, but can decrease read costs.
                                  Box 2: Yes
                                  Non-relational data increases write costs, but can decrease read costs.
                                  Box 3: No
                                  Non-relational data increases write costs, but can decrease read costs.


                                  NEW QUESTION # 256
                                  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 Data Factory pipeline that uses Azure Cosmos DB Core (SQL) API as the input and Azure Blob Storage as the output.
                                  Does this meet the goal?

                                  Answer: A

                                  Explanation:
                                  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/changefeed-ecommerce-solution


                                  NEW QUESTION # 257
                                  You have an app that stores data in an Azure Cosmos DB Core (SQL) API account The app performs queries that return large result sets.
                                  You need to return a complete result set to the app by using pagination. Each page of results must return 80 items.
                                  Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

                                  Answer:

                                  Explanation:

                                  Explanation

                                  Step 1: Configure the MaxItemCount in QueryRequestOptions
                                  You can specify the maximum number of items returned by a query by setting the MaxItemCount. The MaxItemCount is specified per request and tells the query engine to return that number of items or fewer.
                                  Box 2: Run the query and provide a continuation token
                                  In the .NET SDK and Java SDK you can optionally use continuation tokens as a bookmark for your query's progress. Azure Cosmos DB query executions are stateless at the server side and can be resumed at any time using the continuation token.
                                  If the query returns a continuation token, then there are additional query results.
                                  Step 3: Append the results to a variable
                                  Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/sql-query-pagination


                                  NEW QUESTION # 258
                                  ......

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