I have passed class 12 this yr with the percentage of 84 and jee advanced 2020 percentage is 78 in which college of btech i can get the admission

You can apply for good private universities or institutes who are taking their own entrance exam and having their own admission criteria like:

SHIVNADAR UNIVERSITY

NORTHCAP UNIVERSITY

MANIPAL INSTITUTE OF TECHNOLOGY

IILM UNIVERSITY,GURUGRAM

LOVELY PROFESSIONAL UNIVERSITY

BML MUNJAL UNIVERSITY

AMITY UNIVERSITY

SRM UNIVERSITY etc

You can also try for state level counselling for engineering admission.

IILM UNIVERSITY,GURUGRAM is offering B.tech in computer Science and Information Technology with contemporary computing areas like:

Cloud Computing

Artificial Intelligence (AI)

Big data

Internet of Things (IoT)

Machine Learning

Deep Learning

Image processing

Block Chain

hey,

I think that you will face difficulty to get admission in nit and iiit.(chances to get admissions in top colleges is quite low). You will have to work hard in September attempt. You can use careers360 rank predictor for it to get more details about the same. It will be helpful.