Explanation
Customer data must be analyzed using managed Spark clusters.
You create spark clusters through Azure Databricks.
References:
https://docs.microsoft.com/en-us/azure/azure-databricks/quickstart-create-databricks-workspace-portal
Topic 2, Trey Research Case study
This is a case study. Case studies are not timed separately. You can use as much exam time as you would like to complete each case. However, there may be additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other question on this case study.
At the end of this case study, a review screen will appear. This screen allows you to review your answers and to make changes before you move to the next sections of the exam. After you begin a new section, you cannot return to this section.
To start the case study
To display the first question on this case study, click the button. Use the buttons in the left pane to explore the content of the case study before you answer the questions. Clicking these buttons displays information such as business requirements, existing environment, and problem statements. If the case study has an All Information tab, note that the information displayed is identical to the information displayed on the subsequent tabs. When you are ready to answer a question, click the button to return to the question.
Background
Trey Research is a technology innovator. The company partners with regional transportation department office to build solutions that improve traffic flow and safety.
The company is developing the following solutions:

Regional transportation departments installed traffic sensor systems on major highways across North America.
Sensors record the following information each time a vehicle passes in front of a sensor:
* Time
* Location in latitude and longitude
* Speed in kilometers per second (kmps)
* License plate number
* Length of vehicle in meters
Sensors provide data by using the following structure:

Traffic sensors will occasionally capture an image of a vehicle for debugging purposes.
You must optimize performance of saving/storing vehicle images.
Traffic sensor data
* Sensors must have permission only to add items to the SensorData collection.
* Traffic data insertion rate must be maximized.
* Once every three months all traffic sensor data must be analyzed to look for data patterns that indicate sensor malfunctions.
* Sensor data must be stored in a Cosmos DB named treydata in a collection named SensorData
* The impact of vehicle images on sensor data throughout must be minimized.
Backtrack
This solution reports on all data related to a specific vehicle license plate. The report must use data from the SensorData collection. Users must be able to filter vehicle data in the following ways:
* vehicles on a specific road
* vehicles driving above the speed limit
Planning Assistance
Data used for Planning Assistance must be stored in a sharded Azure SQL Database.
Data from the Sensor Data collection will automatically be loaded into the Planning Assistance database once a week by using Azure Data Factory. You must be able to manually trigger the data load process.
Privacy and security policy
* Azure Active Directory must be used for all services where it is available.
* For privacy reasons, license plate number information must not be accessible in Planning Assistance.
* Unauthorized usage of the Planning Assistance data must be detected as quickly as possible.
Unauthorized usage is determined by looking for an unusual pattern of usage.
* Data must only be stored for seven years.
Performance and availability
* The report for Backtrack must execute as quickly as possible.
* The SLA for Planning Assistance is 70 percent, and multiday outages are permitted.
* All data must be replicated to multiple geographic regions to prevent data loss.
* You must maximize the performance of the Real Time Response system.
Financial requirements
Azure resource costs must be minimized where possible.

C: Virtual Network (VNet) service endpoint provides secure and direct connectivity to Azure services over an optimized route over the Azure backbone network. Endpoints allow you to secure your critical Azure service resources to only your virtual networks. Service Endpoints enables private IP addresses in the VNet to reach the endpoint of an Azure service without needing a public IP address on the VNet.
A: You must have Allow trusted Microsoft services to access this storage account turned on under the Azure Storage account Firewalls and Virtual networks settings menu.
Incorrect Answers:
D: Virtual Network (VNet) service endpoint policies allow you to filter egress virtual network traffic to Azure Storage accounts over service endpoint, and allow data exfiltration to only specific Azure Storage accounts.
Endpoint policies provide granular access control for virtual network traffic to Azure Storage when connecting over service endpoint.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-service-endpoints-overview

Explanation

Box 1: Eventual
Traffic data insertion rate must be maximized.
Sensor data must be stored in a Cosmos DB named treydata in a collection named SensorData With Azure Cosmos DB, developers can choose from five well-defined consistency models on the consistency spectrum. From strongest to more relaxed, the models include strong, bounded staleness, session, consistent prefix, and eventual consistency.
Box 2: License plate
This solution reports on all data related to a specific vehicle license plate. The report must use data from the SensorData collection.
References:
https://docs.microsoft.com/en-us/azure/cosmos-db/consistency-levels

Explanation
The data engineers must set the SQL Data Warehouse compute resources to consume 300 DWUs.
Note: There are three architectural models that are used in Azure SQL Database:
* General Purpose/Standard
* Business Critical/Premium
* Hyperscale

Reference:
https://docs.microsoft.com/en-us/azure/active-directory/managed-identities-azure-resources/overview
https://docs.microsoft.com/en-us/azure/data-factory/connector-azure-data-lake-storage