Computers & IT (Non-Engg)

Being a B.Sc graduate, you would have studied LINUX during your graduation. The syllabus of Linux at Mumbai University forms a strong base for RHCSA (Provided you have studied it logically).
There is a huge scope. Linux being open source is used a lot, mostly by organizations and government too. Also

Yes,
NIOS students can take admission into BCA without any problem. You just need to make sure that you score at least 45% in your +2 from NIOS. If you can meet this criteria then you can take admission into BCA into almost every college. Remember that there are different criteria for different univ

There are many networking courses like CCNA a+ etc.

It basically depend on institute, where you take admission.

Dear Divi,
Since you have engineering background, you can do PGDM with specialisation in Business Analytics which is very upcoming field today.

People might talk all about passion and hard-work, but some other things that matter are getting real. Other answers have advice on what language to learn or what book to read, but I will give you some real world advice.
There are three most common pathways to enter the game industry: as a programmer

Dear,
Yes, you are eligible.

Yes, you can easily get admission in this college for this course.