MCA Scope

You can check the following link
https://www.shiksha.com/it-software/articles/career-options-after-mca-blogId-13611

Placements depend on many factors, your skills, type of college, reputation of college, marks, knowledge, communication etc. Go to a college that offer placements and nowhere else.

With an MCA degree, you can get a job in both Indian and foreign IT companies. Here are some of the jobs you may get after completing MCA Software Engineer/ Developer as a Software Engineer you are responsible for designing, developing, installing, testing and maintaining software systems. You can expect an average CTC of INR 3-4 Lacs pa.

You can apply for Data Operator or junior programmer post.

Yes, A level holder can apply whereas a BCA holder cannot. B level is equivalent to MCA.

After MCA, you can go for a job. But, you are a fresher, you don't have any industrial experience. You don't an industrial fit candidate. So, grab some experience from real industry. Take any short term technology course with an internship. Then you can go for a job. For more information: http://www.innostack.in/training-programs/.

The only drawback of BCA+MCA over B.Tech is that you will have to spend 1 extra year in BCA+MCA but I would suggest you to go for BCA+MCA because it makes your fundamentals strong if you are not from computers background. Also, there is less unnecessary pressure and workload in BCA so that you can focus on your skills better. As far as salary is concerned, to an exceptionally skilled person there is no limit. But even if you are sound at coding and have some good logic then your minimum salary will start from 25k to 30k and with your skills, your salary will increase exponentially.