BCA

Hello Shubham,
First choose a field in which you want to go among testing, coding and designing.
If you want to go into testing then you can do a certification in the same. All testing courses are of 3-6 month of duration.
If you want to go into coding (development) then you can pursue a certification course on your choice in any of the languages including Java, VB, C#, Advance C, PHP, Asp etc.
If you want to go with designing, you can pursue courses like web designing, basic animation, graphic designing, advanced photoshop etc.

Dear Sri Raja Kumaran Raj,
You can prepare for CAT exam and get a good score in it. With this you can get admission in Indian Institute of Foreign Trade, New Delhi / Kolkata as they are offering MBA in foreign trade that deals with import and export. All the best.

Yes, VIT does offer placement to BCA students.

You need to complete your HSC education (Karnataka PUC / ISC / CBSE / NIOS / IGCSE / IB) from any recognised Board in India or abroad.
Candidates who are from non-computer science background should have studied any of the following subjects at the +2 level:Mathematics
Computer Science
Business mathematics or electronics.
Candidates writing the +2 examinations in March-May 2016 may apply with their class 10th and 11th marks.

You need to qualify the entrance test in order to pursue MCA.

Hello Nipun,
B.Tech: More of mathematics, algorithm designs, knowledge of core computer knowledge, and performance optimization.
BCA: It deals with computer applications. For example, to build a software program for a particular purpose.
B.Tech designs the performance optimized algorithm and BCA implements it in a particular programming language.
This is just a difference with the respect to course work. But, as far as knowledge is concerned, it is up to you how you gather knowledge. A BCA graduate could have more knowledge than a B.Tech graduate and Vice-Vera.

You may have to face some challenges in getting a good job after BCA through distance learning. It is suggested that you work to get few industry recognized certifications to increase your employ-ability along with BCA degree.