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You have 100 devices that connect to an Azure IoT hub named Hub1. The devices connect by using a symmetric key. You deploy an IoT hub named Hub2. You need to migrate 10 devices from Hub1 to Hub2. The solution must ensure that the devices retain the existing symmetric key. What should you do?

A.    Add a desired property to the device twin of Hub2. Update the endpoint of the 10 devices to use Hub2.
B.    Add a desired property to the device twin of Hub1. Recreate the device identity on Hub2.
C.    Recreate the device identity on Hub2. Update the endpoint of the 10 devices to use Hub2.
D.    Disable the 10 devices on Hub1. Update the endpoint of the 10 devices to use Hub2.

Answer: B
Desired properties. Used along with reported properties to synchronize device configuration or conditions. The solution back end can set desired properties, and the device app can read them. The device app can also receive notifications of changes in the desired properties.

You have an existing Azure IoT hub. You use IoT Hub jobs to schedule long running tasks on connected devices. Which two operations do the IoT Hub jobs support directly? (Each correct answer presents a complete solution. Choose two.)

A.    Trigger Azure functions.
B.    Invoke direct methods.
C.    Update desired properties.
D.    Send cloud-to-device messages.
E.    Disable IoT device registry entries.

Answer: BC
Consider using jobs when you need to schedule and track progress any of the following activities on a set of devices:
– Invoke direct methods
– Update desired properties
– Update tags

You have 1,000 IoT devices that connect to an Azure IoT hub. Each device has a property tag named city that is used to store the location of the device. You need to update the properties on all the devices located at an office in the city of Seattle as quickly as possible. Any new devices in the Seattle office that are added to the IoT hub must receive the updated properties also. What should you do?

A.    From Automatic Device Management, create an IoT device configuration.
B.    From the IoT hub, generate a query for the target devices.
C.    Create a scheduled job by using the IoT Hub service SDKs.
D.    Deploy an Azure IoT Edge transparent gateway to the Seattle office and deploy an Azure Stream Analytics edge job.

Answer: A
Automatic device management in Azure IoT Hub automates many of the repetitive and complex tasks of managing large device fleets. With automatic device management, you can target a set of devices based on their properties, define a desired configuration, and then let IoT Hub update the devices when they come into scope. This update is done using an automatic device configuration or automatic module configuration, which lets you summarize completion and compliance, handle merging and conflicts, and roll out configurations in a phased approach.

You have an Azure IoT solution that includes multiple Azure IoT hubs in different geographic locations and a single Device Provision Service instance. You need to configure device enrollment to assign devices to the appropriate IoT hub based on the following requirements:
– The registration ID of the device.
– The geographic location of the device.
– The load between the IoT hubs in the same geographic location must be balanced.
What should you use to assign the devices to the IoT hubs?

A.    Static configuration (via enrollment list only)
B.    Lowest latency
C.    Evenly weighted distribution
D.    Custom (Use Azure Function)

Answer: A
The allocation policy is a Device Provisioning Service setting that determines how devices are assigned to an IoT hub. There are three supported allocation policies:
– Lowest latency: Devices are provisioned to an IoT hub based on the hub with the lowest latency to the device.
– Evenly weighted distribution (default): Linked IoT hubs are equally likely to have devices provisioned to them. This is the default setting. If you are provisioning devices to only one IoT hub, you can keep this setting.
– Static configuration via the enrollment list: Specification of the desired IoT hub in the enrollment list takes priority over the Device Provisioning Service-level allocation policy.

You are developing an Azure IoT Central application. You add a new custom device template to the application. You need to add a fixed location value to the device template. The value must be updated by the physical IoT device, read-only to device operators, and not graphed by IoT Central. What should you add to the device template?

A.    a Location property
B.    a Location telemetry
C.    a Cloud property

Answer: A
For example, a builder can create a device template for a connected fan that has the following characteristics:
– Sends temperature telemetry
– Sends location property

You have a Standard tier Azure IoT hub and a fleet of IoT devices. The devices connect to the IoT hub by using either Message Queuing Telemetry Transport (MQTT) or Advanced Message Queuing Protocol (AMQP). You need to send data to the IoT devices and each device must respond. Each device will require three minutes to process the data and respond.
Solution: You update the twin desired property and check the corresponding reported property.
Does this meet the goal?

A.    Yes
B.    No

Answer: A

You have a Standard tier Azure IoT hub and a fleet of IoT devices. The devices connect to the IoT hub by using either Message Queuing Telemetry Transport (MQTT) or Advanced Message Queuing Protocol (AMQP). You need to send data to the IoT devices and each device must respond. Each device will require three minutes to process the data and respond.
Solution: You use cloud-to-device messages and watch the cloud-to-device feedback endpoint for successful acknowledgement.
Does this meet the goal?

A.    Yes
B.    No

Answer: B

You are deploying an Azure IoT Edge solution that includes multiple IoT Edge devices. You need to configure module-to-module routing. To which section of the deployment manifest should you add the routes?

A.    storeAndForwardConfiguration
B.    $edgeHub
C.    modules
D.    systemModules

Answer: B
Routes are declared in the $edgeHub desired properties.

You have an IoT device that has the following configurations:
– Hardware: Raspberry Pi
– Operating system: Raspbian
You need to deploy Azure IoT Edge to the device. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.    Update the IoT Edge runtime.
B.    Install the IoT Edge security daemon.
C.    Run the Deploy-IoTEdge PowerShell cmdlet on the IoT Edge device.
D.    Install the container runtime.

Answer: AB
The Azure IoT Edge runtime is what turns a device into an IoT Edge device. The runtime can be deployed on devices as small as a Raspberry Pi or as large as an industrial server. The IoT Edge security daemon provides and maintains security standards on the IoT Edge device. The daemon starts on every boot and bootstraps the device by starting the rest of the IoT Edge runtime.

You have an Azure IoT solution that includes a basic tier Azure IoT hub named Hub1 and a Raspberry Pi device named Device1. Device1 connects to Hub1. You back up Device1 and restore the backup to a new Raspberry Pi device. When you start the new Raspberry Pi device, you receive the following error message in the diagnostic logs of Hub1: “409002 LinkCreationConflict”. You need to ensure that Device1 and the new Raspberry Pi device can run simultaneously without error. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.    On the new Raspberry Pi device, modify the connection string.
B.    From Hub1, modify the device shared access policy.
C.    Upgrade Hub1 to the standard tier.
D.    From Hub1, create a new consumer group.
E.    From Hub1, create a new IoT device.

Answer: AE

You have an Azure IoT Central application that monitors 100 IoT devices. You need to generate alerts when the temperature of a device exceeds 100 degrees. The solution must meet the following requirements:
– Minimize costs
– Minimize deployment time
What should you do?

A.    Perform a data export to Azure Service Bus.
B.    Create an email property in the device templates.
C.    Perform a data export to Azure Blob storage and create an Azure function.
D.    Create a rule that uses an email action.

Answer: D
You can create rules in IoT Central that trigger actions, such as sending an email, in response to telemetry-based conditions, such as device temperature exceeding a threshold.

Drag and Drop
You have an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and 1,000 connected IoT devices. The IoT devices are allocated to tour enrollment groups. Each enrollment group is configured to use certificate attestation. You need to decommission all the devices in a single enrollment group and the enrollment group itself. 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.)

To deprovision all of the devices that have been provisioned through an enrollment group:
1. Disable the enrollment group to disallow its signing certificate.
2. Use the list of provisioned devices for that enrollment group to disable or delete each device from the identity registry of its respective IoT hub.
3. After disabling or deleting all devices from their respective IoT hubs, you can optionally delete the enrollment group. Be aware, though, that, if you delete the enrollment group and there is an enabled enrollment group for a signing certificate higher up in the certificate chain of one or more of the devices, those devices can re-enroll.

You create an Azure Stream Analytics job that has the following query:
The job is configured to have an Azure IoT Hub input and an output to an Azure function. For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Box 1: Yes. All time handling operations in Azure Stream Analytics are in UTC.
Box 2: No. Tumbling windows are a series of fixed-sized, non-overlapping and contiguous time intervals.


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