USA

You need to take GMAT but Indian government won't consider foreign MBA certificate.

You will be eligible to stay and look for a job in the US under OPT scheme for 12 months. If it is a STEM (Science, Technology, Engineering, and Maths) course you will be eligible for STEM OPT which is 36 months. CSE is usually a STEM course. In order to get a good job, you should have good skills, qualifications and academic performance. Overall, USA is a very competitive country.

Dear Aditya,
You can shortlist a few universities as per your profile, which includes academic grades, test scores, research work and extra curricula and check the university requirements. It is pretty much like a job search.
Meeting admission requirement is crucial and to be taken seriously. To pursue MS in USA, you must take GRE and any reputed university will require a brilliant profile. I will suggest you to start off by visiting university websites and go through the department page for detailed information.

Hi Pavankumar,
University of Texas includes 14 academic institutions such as University of Texas at Austin, University of Texas at Dallas, The University of Texas at Arlington and so on all of which together forms the University of Texas System. So, you need to be a little specific about the institution you are referring to. Visit the university website for specific information. The University of Texas System is one of the USA's largest systems of higher education.