Its better if you fill it through pc/laptop because some Exams forms are not supported in smart phone and require latest Browsers . So if you will fill any Exam form through mobile phone may be the site will crash in between and worst case will be it will crash during payment . If you have mentioned Exam name i could have given better suggestion. So sorry if it didn’t help.
Thank you very much. Please kindly reply to this comment when you have completed the questions. Also, if you have any questions let me know using this comment page.