Yes, you can definitely pursue a B.Tech degree after completing a diploma in Computer Science! Here's how you can get admission into a good B.Tech college for the second year (lateral entry).

You need to have a diploma in Computer Science or a related field from a recognized institution (AICTE approval is preferred).
Most colleges require a minimum percentage of marks in your diploma, typically ranging from 50% to 60%.

Some colleges might conduct their own entrance exams for lateral entry into the B.Tech program. However, many colleges grant admission based on your diploma marks alone. Colleges will select students for the second year of B.Tech based on their performance in the diploma program (merit list).

I hope it helps!