Sololearn is one of the best application for beginners who wants to start learning new languages like c, c+ , java, JavaScript, html etc.I have been using more than 3 month it is very good to learn.It includes all concepts from starting to advanced one. Both videos and text format also provided. After finishing one unit test is given based on concept.It provides questions and answers section where you can ask for any queries related to subject. This application is easy to use and faster. After completion of full exercises and test you will given a course completion certificate. I recommend everyone to use it.