Hi Arpita sahoo
Firstly congratulations on completing your 10+2 . So being a PCM student makes you eligible to pursue computer science as a course for your future further .

Now to do post graduation or master's in computer science you first need to complete your undergraduation or bachelor's in computer science itself .

Now you have different eligibility criteria for both the graduation .
eligibility criteria for BSC Computer Science as follows:
this is a science course .BSc Hons computer science is its three year full time undergraduate course which is divided into 6 semesters.  the minimum eligibility for the course is qualification with the minimum aggregate score of 45% in 12th

as soon as you are done with your bachelor's degree you can and then go for Masters in computer science this is  a  program that caters to the needs of students like you who are interested in the field of computer science . the eligibility criteria for doing Masters in computer science is as follows:

candidate contemplating the course must have passed 2nd class in Computer Science honours. Then further there is an entrance exam as well as merit list for your selection and them you can purse this course .

Thank you.
I hope I was helpful

hello,
for doing masters in computer science you need to have a bachelors degree in mathematics, physics or any other related field. and with atleast 50% marks in bachelors. surely you can do masters if you have 50% marks in bachelors.