B.Tech

Go for B.Sc. Then M.Sc. Followed by Ph.D. to get into research field.

Check out the list of all the best private Colleges in west Bengal for CSE along with details like placement, fee structure, faculty, etc. On Shiksha.com.

*Eligibility criteria :
Candidate must have passed diploma in Engineering/Technology in relevant stream from a recognized University.
*Admission Process :
Admission is through counselling based on the rank obtained in Andhra Pradesh Engineering Common Entrance Test (AP-ECET).

Please visit this site first-
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/amp/jee-main-exam-cutoff&ved=2ahUKEwiPjtj8_LvhAhVIcCsKHSAnB10QFjAAegQIBRAC&usg=AOvVaw0iFAYbXCMPRZzeFBDWnX1Z&cf=1.

Hello
Please visit this site-
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwidkeeQ-bvhAhVCeysKHeTvAgYQFjAAegQIBBAB&usg=AOvVaw1N9BzFtyUCP4JU-2UQHQ0H.

IIT Kharagpur. NIT Durgapur. Faculty of Engineering & Technology, Jadavpur University, Kolkata. Institute of Engineering & Management, Kolkata. Kalyani Government EngineeringCollege, Nadia. Heritage Institute of Technology, Kolkata. Dear, these are the best colleges in West Bengal fir B.Tech in computer Science and engineering.
All the best.

Please Check Out the below link :
https://www.shiksha.com/b-tech/ranking/top-computer-science-engineering-colleges-in-Delhi-ncr/46-2-0-10223-0.

Hello Vikas, yes surely and definitely you can seek lateral admission after completion of your Diploma examination. Some States in India conduct CET while others give admission based on marks obtained in Diploma. You can find details on the webpage of DTE of your state.
Best wishes to you.