How many online course are there, like nptel and which is best among them and how to apply for those courses? With certification.
You can go to the website of NPTEL there you are able to find all the courses available and starting and ending date of all the courses you can pick up the courses which you like and enroll for them once you enroll you get all the information regarding the course and assessment policy of the courses. The courses can be certified but for that you have to appear for physical exam and pay the required fee.