B.Sc

She must have completed 1st year, then she can try for 2nd year admission. For admission, you can contact directly to college.

Hi Touseer,
Yes, you can pursue PG course by giving entrance exam held every year in various universities. And, for this you need to visit their sites and see their admission criteria and eligibility criteria.

No there is no entrance exam there is a scholarship exam

You just have to came to the campus or your nearby office and take admission and you will take admission online also.

Yes if you want to do then you will do but I am not that much sure about this please refer to the Chandigarh University office number

Both microbiology and CS are have a good career. It should depend on your interest which ever course you take you can be successful. All the best.