Diploma

No, as of now the provision of lateral entry is not there.

Yes, various college and institutes offer this actuarial Science course. This course involves certification by the institute in which it is offered.

Hi,
Can you please be more specific about which college you are asking about so that we can help you with proper information?

This might help you:-
You can take admission here as the college wants aggregate marks of 50%.
https://www.shiksha.com/college/walchand-college-of-engineering-sangli-21548/admission

Hello Gajendra,
It's very nice to hear from you that you are interested in doing your graduation in engineering in aeronautical engineering branch after completion of your Diploma. There are different methods adopted by different states. Some give admission based on the marks obtained in Diploma exam while others give admission based on the entrance exam for lateral admission. You need to check this for your state and follow the procedure.

Kindly visit this link:
https://www.shiksha.com/b-tech/course/b-tech-in-chemical-technology-food-technology-rashtrasant-tukadoji-maharaj-nagpur-university-193806

Talking about placements, basically, there is nothing like 100% placement. Placements opportunities are good you will get good environment skill but you have to fight for the job you want. No one will be spoon feeding you here. They will only provide stairs for. And rest you have to do.