I am in final year of Engineering (September is going on). My college placement will start in 15 days but my preparation is so less. Is it late? Can I start now? How much time will it take to prepare for placement?

Should had prepared earlier but anyways. Start preparing now, and it will not be the case that you only have to get placed in 15 days, mostly in colleges, the first companies that come are mostly higher – paying companies (at least this was the case in VIT) so you will mostly will not be able to crack those companies, so you don’t just have 15 days, you have more than that. So start preparing now and stop wasting time in asking such questions.