BITS Pilani - Birla Institute of Technology and Science Answered Questions

Yes, you can. But the procedure is pretty cumbersome. First of all, the only genuine reason is entertained (like clashing with another exam).You'll have to send in your reason to change the date, along with necessary documents via post (the exact procedure must be given somewhere on bitsadmission.com, if not contact BITS people).
Also, you don't get to choose your new slot, they'll give you the slot near the end dates of exam and add to that, you have to come all the way to the location to take the exam, you don't get the centre of your choice as well.

Hello,
All the colleges you mentioned above have their own entrance examinations for admission into engineering courses. SRM conducts SRMJEEE entrance examination, BITS, Pilani conducts BITSAT entrance examination, VIT conducts VITEEE entrance examination. Kindly check on the official website of the respective colleges for applying online. I hope this answers your question. If you have any further questions, kindly revert.

BITS - Pilani offers M.Tech software systems through distance learning. M.Tech in software systems is a 4 semester work integrated learning program that is designed to meet the growing demand for IT professionals, who can design software systems such as embedded systems and networked systems. The program will help you to take higher responsibilities of designing and architecting systems.