Hello Meena!

Please note that MCA is a masters course, so you compulsorily require a graduation certificate in order to get admission into that course. Diploma holders are not eligible to apply for masters degrees like MCA, MBA and MSc directly after they complete their diploma. Go for BCA/BSc or B.Tech degree and after completion, you can apply for MCA.

You have to complete at least a graduation degree with minimum 50% marks from a recognized institution and most probably appear entrance tests like CMAT or NIMCET to get admission to MCA courses in top colleges.

Refer the article below for complete info:-

https://www.google.com/amp/s/www.careers360.com/courses/mca-master-of-computer-applications/amp

Hope you are clear!