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Microsoft Azure IoT Developer (AZ-220) Exam Questions

Microsoft

Microsoft Azure IoT Developer (AZ-220)

53 / 125

Question 53:

You have to build an IoT solution which gathers data from 1000 devices, with the expected total load of 100k messages per day. The fleet of devices is quite diverse which means that there is a significant number of legacy devices (some of which can only communicate on traditional industrial protocols), high-power devices capable of running resource-intensive algorithms on their own (edge), and, also there will be high-end devices (smart sensors). While designing your solution, the connectivity capabilities of the different device types should be considered. 
Which of the following statements is not true?

Answer options:

A.Smart sensors can connect to IoT hub via MQTT
B.Gateway devices can connect to IoT Hub via AMQP
C.Legacy field devices can connect to IoT hub on AMQP
D.Devices which must receive C2D messages should connect via MQTT