Aviation

Your question covers an entire industry. Aviation sector is huge and has a lot of job profiles related to it. It depends on you where you want to go. Please clarify so that I can respond accordingly.
That is a question asked about the industry and there is no mention of the job profile.
Such questions require discussion as they look to elaborate an industry and not just a profile.
I'll give you a brief about the main job portfolios that are hosted by the aviation industry:
For Pilot Training:
1. Indira Gandhi Rashtriya Udan Academy (IGRUA) - Rae Bareli is the only government-owned institute for pilot training.
There are state flying clubs which run in collaboration with state governments:
2. Madhya Pradesh Flying Club - Indore & Bhopal
3. Nagpur Flying Club, etc.
CAE Gondia is another premier institute which works in collaboration with some private airlines to train candidates to obtain a CPL.
For AME (Aircraft Maintenance Engineer) Course:
1. Indian Institute Of Aeronautics (IIA)
2. Indian Aviation Academy
For Flight Dispatchers Course:
1. CTE Hyderabad - Run by Air India
For air hostess training:
There are no government-owned colleges. However, a number of private academies are operational in the market.
This was an explanation that basically covers wider view about the main job roles in aviation industry, choose yours wisely and then proceed accordingly.

Indigo Airlines and Jet Airways both are two domestic airlines offering cadet pilot programmes. It commences from ab-initio and culminates at CPL and finally job with them. They do have job guarantee. But the training cost is much higher as compared to outside in the market.
For Jet Airways:
https://www.cae.com/civil-aviation/aviation-professionals/become-a-pilot/full-time-training/jet-airways-cadet-pilot-programme/
For Indigo International Pathway:
https://www.cae.com/civil-aviation/aviation-professionals/become-a-pilot/full-time-training/indigo-cadet-pilot-programme-international-pathway
For Indigo Domestic Pathway:
https://www.cae.com/civil-aviation/aviation-professionals/become-a-pilot/full-time-training/indigo-cadet-pilot-programme-domestic-pathway

To become a commercial pilot, there is a specific eligibility criteria which you should first be aware of. This is decided on what subjects have you taken in class 12th. It requires PCM to be a pilot. And, even if you have not opted for the same, then you can appear separately for these subjects and become eligible.Further, you should be aware that you are medically fit to be a pilot, so I would suggest you to visit http://www.dgca.nic.in/medical/medical-ind.htm and go to the class 2nd examiners tab to find out doctors who will examine you for initial fitness. You can visit any doctorate from the list as per your convenience. Once you are done with Class 2nd medical, find out a suitable flying club for you as per your convenience. You can fly in India or abroad. I would suggest you fly in India. Besides finding the club, be aware that you will have to appear for:
1. Air Navigation
2. Aviation Meteorology
3. Air Regulations
4. Aviation Technical
5. Aircraft Specific
6. Radio Telephony
Here, 1-5 are conducted by DGCA and 6 is conducted by WPC. Prepare for these subjects and appear, as exams are conducted every quarterly. For preparation, flying club will help you or there are private instructors available in metro cities as well. You will fly for 200Hrs + Clear DGCA and WPC exams + Clear Class 1st medical, then you shall get your CPL. The next license is ATPL, which you shall be able to apply for once. You will then have to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline. Then, you finally get a job as a pilot. I hope the process is well explained to you. CPL is an expensive affair. It might cost you around Rs.18-20 Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10,000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15 Lacs. So, decide wisely before you enter the field.