B.Sc Computer Science

Hello Tejas,
Presently, you are doing B.Sc in Computer Science and are in the 2nd year. Now you want to know if M.Sc. Computer Science subject is available in Jan exam. Right? Frankly your query is not very clear but still I will try to answer what I understood. Let me explain to you. After you complete your B.Sc. Then you become eligible for M.Sc. Now, normally speaking, in a majority of colleges in India the session begins in July or August and exams are conducted in the month of April to June. If someone fails this exam then supplementary exam is conducted normally in December. So M.Sc. Exam for any subject including computer Science will normally be conducted between April to may and supplementary exam in the month of December.
I hope this clarifies your doubt.

BCA is much better as compared to B.Sc. Because, B.Sc is a general course whereas BCA is a technical course. Getting a job after BCA is relatively easy as compared to B.Sc. As you are not able to pursue B.Tech, then you'll have to work much harder on developing skills and knowledge while pursuing BCA in order to achieve a good career with nice salary package. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students. It has programs and assignments of languages like C, C+ and Java with their outputs. You'll be studying these languages in your 3 years of BCA. https://play.google.com/store/apps/details?id=technark.bca_courprogramming.