M.Sc

First of all, if you have completed your graduation in computer science as a mandatory subject in all three years then you are eligible for M.Sc. You can prepare for the entrance exam by studying operating system, data structure in C, data communication and computer network, database management system, digital computer and concept of a graph, tree, c language operator, stack and queue. Go on BHU official website and download the last five year PET computer science entrance test paper and prepare according to with the question alternativity.
Thank you.

Visit on this link.
https://www.shiksha.com/university/manipal-university-manipal-academy-of-higher-education/met-exam

Admission will start may be in the month of June.

Annamalai University has distant centre there too. Enroll first in university and get in touch to your nearest centre.

It vary from college to college. I am mentioning fee of CFTRI which is 24000 rupees per annum.

Visit the below mentioned link:
https://www.shiksha.com/science/colleges/m-sc-physics-colleges-Punjab

Fees –
Year 1 - INR 2.25 Lacs
Year 2 - INR 2.25 Lacs
Total fees - INR 4.50 Lacs
Eligibility: Minimum 50% in graduation. Candidate must be a graduate in Life Sciences/ Microbiology/ Biotechnology/ Pharmacy/ Medicine/ Nursing/ Physiotherapy/ Dentistry/ Homeopathy/ Ayurvedic and Veterinary Science.
Admission Process:
1. Eligible candidates need to appear for the ICRI written exam.
2. Shortlisted candidates will be called for personal interview based on marks obtained in ICRI written exam.