Forms for JEE Main 2015 are available from November 7, 2014 and can be filled till December 18, 2014 The exam can be taken via either the offline mode (pen and paper based) or online mode. The offline mode is the conventional method where there will be a question paper and an answer sheet to fill up the options. The online mode of examination is a feature that was introduced to keep up with the changing times. Since it is a new system, there may be quite some doubts regarding the process. But you will be glad to know that through the online mode, you have some perks over the handwritten exam. Take a look: Some advantages of online exam over offline exam The biggest advantage of the online mode is that at any point during the exam, you can go back to previous answers and change the options. This is not possible in pen and paper based exam. There is an option to mark questions that you want to come back to review. There is color-coded panel on the screen that keeps tr