Computers & IT (Non-Engg)

No, mathematics is not compulsory. You can also take PCB and do B.Sc. B.Sc in maths requires a thorough knowledge of mathematical concepts, but other courses or streams do not.

Diploma in Software Engineering or Computer Science or Information Technology is not a sufficient qualification for seeking jobs even with CEH certification and to become an ethical hacker. You are advised to take Science with Maths stream and then do B.Tech CS/ IT or BA-MA or B.Sc-M.Sc in CS/IT before seeking CEH certification. Path suggested may look long and hard but it will be helpful in the long successful professional career.

You should do ethical Hacking from any private institution, because private institutions can give you placement or you can opt for ANDROID or ASP.NET. They are also high earning short term courses.

https://www.shiksha.com/it-software/colleges/bca-colleges-kolkata
Please click on the above link to get a list of good BA colleges in Kolkata.

https://www.shiksha.com/it-software/articles/what-is-mca-all-about-know-the-full-form-eligibility-and-scope-blogId-13487
https://www.shiksha.com/it-software/colleges/mca-colleges-pune
Please click on the link to know everything about MA and also get a list of good MA colleges in Pune.

Kindly visit the link mentioned below:
http://www.bits-pilani.ac.in/university/wilp/wilpoverview