Microsoft Azure IoT Developer — Question 18

You have an Azure IoT solution that contains an Azure IoT Edge device named Edge1.

Edge1 fails to start.

You connect to Edge1 and identify the following:
• The IoT Edge agent is running.
• The IoT Edge agent continually reports the following error: “Empty dconfig file.”
• No modules have started.

You need to ensure that Edge1 starts successfully.

What should you do?

Answer options

• A. Update the /etc/hosts file for the host operating system and restart Edge1.
• B. Reapply the iotedge config and restart Edge1.
• C. Specify a DNS server for the container engine and restart Edge1.
• D. Restart the Docker service.

Correct answer: C

Explanation

The correct answer is C, as specifying a DNS server for the container engine can resolve connectivity issues that prevent modules from starting. Option A does not address the specific error reported by the IoT Edge agent. Option B, while relevant, does not directly solve the issue of the DNS configuration, and Option D might not resolve the underlying problem of the empty dconfig file.