Hi Akshata,

Most Universities grant merit-based admission to the B.Sc. Computer Science program. The application forms are made available in the months of May and June. In the application forms, students mark their preference for Computer Science. Universities then declare a cut-off list. Students who fulfill the cut-off are eligible for the admission in that particular university. 

Universities such as Banaras Hindu University conduct (BHU-UET) for admission to their honors program in Computer Science. The questions are of 10+2 level. Admissions in various courses have already started after decleration of 12th result.