MCA

During your BCA you would have come to know of your technical strengths. If you technically oriented and good in programming then MCA is very good career option. However if you not technically oriented MBA in finance can be a good career switch option.

A software engineer is a person who applies the principles of software engineering to the design, development, maintenance, testing, and evaluation of the software and systems that make computers or anything containing software work. After MCA if you work in the filed of software engineering, you will be known as Software Engineer. Additional courses or certification will help you to grow in your career as a Software Engineer.

You can pursue M.Tech in CSE or IT otherwise do Ph.D in computer application.

To know about SAP, kindly refer to the link mentioned below:
http://www.saponlinetutorials.com/what-is-sap-erp-system-definition/
Yes, you are eligible for pursuing SAP.

Following are the best colleges to pursue MCA:
1. Heritage Institute of Technology (HIT, Kolkata)
2. Guru Nanak Institute of Technology, Kolkata (GNIT, Kolkata)
3. Pailan College of Management and Technology (PCMT)
4. National Institute of Technology, Durgapur (NIT-D)
5. Netaji Subhash Engineering College (NSEC)
6. Techno India College of Technology (TICT)

Following are the top colleges to pursue MCA:
1.Christ University (CU Bangalore)
2. MIT School of Management (MITSOM)
3. Dr.D.Y.Patil Pratishthan, Padmashree Dr.D.Y.Patil 4.Institute of Master of Computer Applications
5. Dr. C.V. Raman University (CVRU)
6. R.V. College of Engineering (RVCE)

Yes, you can. To pursue MCA in West Bengal, you need to qualify WB-JECA.

Hello Aniket,
Student securing 80%+ agg. in Class XII (CBSE/ISC/State-Boards) are exempted from selection process.
If your score is below 80% then you may have to be selected through the screening process.
All the best.

It solely depends upon where your interests are. Talking about the prospect of securing better jobs, pursuing an MBA in IT/Systems/Operations is a better option than an MCA, as it incorporates both the technical and managerial skills within you. So, any MNC or a local company would prefer someone who acquires both these skills.