Assuming asking after BCA courses, There are many courses, It depends on your interest & Capability which feild you want to choose for further studies. After completing BCA, Generally MCA is preferred by the candidates who are aiming to work in a IT or software environment,  If you wish to take admission in NITs then NIMCET is the entrance exam, You can apply.

If you are interested for MBA then you can apply for the entrance exams like CAT, MAT, CMAT etc.

Good Luck!