Question

What is the java extension file in IoT?

(a) .jar

(b) .c

(c) .exe

(d) .py

This question was posed to me during an interview.

The origin of the question is Publishing Messages with Commands topic in portion Working with the Cloud of IOT

Answer 1

Right option is (a) .jar

For explanation I would say: Java IDE to run the example in any computer or build .jar file with all the dependencies included and launch it any computer or devices that you want to use as the MQTT client with a command similar to the following line.