Masters

It completely depends on your profile including projects, internships and Research along with Grades in Colleges but just don't forget Letter of References matters a Lot.

Recognised means one which offers courses as per the norms of the council constituted by government of India for good quality education. The councils or the commissions recognizes universities on the basis of the quality of education, Infrastructure, etc. And gives it a certificate of recognition. Without this certificate, your degree will be invaluable.

Hi
You will have to keep checking the official websites, although mostly depending upon the universities the notices come in the months of march/april. Maybe this year since other notification are coming early it may also come early.

Hi
Yes, you can change your stream but directly PG in humanities and social sciences seems difficult as a UG is also required in that subject. Nevertheless, you should go through the prospectus provided to confirm the eligibility criteria.

Refer the link:
https://www.shiksha.com/law/colleges/cyber-law-colleges-india?rf=searchWidget&landing=ctp