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Microsoft DP-420 Exam Syllabus Topics:

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

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                                  Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB Sample Questions (Q184-Q189):

                                  NEW QUESTION # 184
                                  You have a container in an Azure Cosmos DB for NoSQL account. The container stores telemetry data from IoT devices. The container uses telemetryId as the partition key and has a throughput of 1,000 request units per second (RU/s). Approximately 5,000 IoT devices submit data every five minutes by using the same telemetryId value.
                                  You have an application that performs analytics on the data and frequently reads telemetry data for a single IoT device to perform trend analysis.
                                  The following is a sample of a document in the container.

                                  You need to reduce the amount of request units (RUs) consumed by the analytics application.
                                  What should you do?

                                  Answer: C

                                  Explanation:
                                  The partition key is what will determine how data is routed in the various partitions by Cosmos DB and needs to make sense in the context of your specific scenario. The IoT Device ID is generally the "natural" partition key for IoT applications.
                                  Reference: https://docs.microsoft.com/en-us/azure/architecture/solution-ideas/articles/iot-using- cosmos-db


                                  NEW QUESTION # 185
                                  Hotspot Question
                                  You have the following Azure Resource Manager (ARM) template.

                                  You plan to deploy the template in incremental mode.
                                  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
                                  An account is not a resource in this context.
                                  Note: In incremental mode, Resource Manager leaves unchanged resources that exist in the resource group but aren't specified in the template. Resources in the template are added to the resource group.
                                  The Microsoft.DocumentDB databaseAccounts/sqlDatabases/containers resource type can be deployed to: Resource groups.
                                  Box 2: Yes
                                  A container is a resource.
                                  Box 3: No
                                  Note that you can't change the partition key of a container. If you do need to change it, you need to migrate the container data to a new container with the correct key.
                                  Reference:
                                  https://docs.microsoft.com/en-us/azure/templates/microsoft.documentdb/databaseaccounts/sqldatabases/containers
                                  https://docs.microsoft.com/en-us/azure/azure-resource-manager/templates/deployment-modes#incremental-mode


                                  NEW QUESTION # 186
                                  You plan to create an Azure Cosmos DB database named db1 that will contain two containers. One of the containers will contain blog posts, and the other will contain users. Each item in the blog post container will include:
                                  * A single blog post
                                  * All the comments associated to the blog post
                                  * The names of the users who created the blog post and added the comments.
                                  You need to design a solution to update usernames m the user container without causing data integrity issues.
                                  The solution must minimize administrative and development effort. What should you include in the solution?
                                  To answer, select the appropriate options in the answer area.
                                  NOTE: Each correct selection is worth one point.

                                  Answer:

                                  Explanation:

                                  Explanation


                                  NEW QUESTION # 187
                                  You are developing a web app named App1 that will store customer-generated content in an Azure Cosmos DB for NoSQL database named DB1.
                                  You configure an Azure Al Search indexer to automatically ingest documents from DB1 into an Azure Al Search index.
                                  App1 uses REST APIs to provide advanced search and retrieval capabilities for the documents.
                                  You need to identify which types of queries you can use in Azure Al Search to retrieve text data. The solution must minimize development effort Which two query types can you use? Each correct answer presents a complete solution.
                                  NOTE: Each correct selection is worth one point.

                                  Answer: C,E


                                  NEW QUESTION # 188
                                  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 an Azure Monitor alert to trigger the function.
                                  Does this meet the goal?

                                  Answer: A

                                  Explanation:
                                  You can set up alerts from the Azure Cosmos DB pane or the Azure Monitor service in the Azure portal.
                                  Note: Alerts are used to set up recurring tests to monitor the availability and responsiveness of your Azure Cosmos DB resources. Alerts can send you a notification in the form of an email, or execute an Azure Function when one of your metrics reaches the threshold or if a specific event is logged in the activity log.


                                  NEW QUESTION # 189
                                  ......

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