Can I get admission in direct 2nd year BCA after completing Diploma in Engineering in Mumbai?

No, you can't. Because it's a degree course so the duration of the course is 3 years and as per UGC guidelines, you have to apply for the course, either regular or distant but you have to join the course from the first year onwards.

You can check the following for information - https://www.shiksha.com/engineering/colleges/colleges-mumbai.

Hi Ravi, no, you cannot get a second year at the lateral entry admission for BCA after completing Diploma in Engineering.