Aviation

Yes, some distance learning colleges offer an MBA in Aviation online:

Note: The information is sourced from the official/counselling body of the institute/exam.

Yes, a few online learning platforms and colleges offer free Online Aviation courses, which are short-term and skill-based. Here are some top options among them:

Note: The information is sourced from the official/counselling body of the institute/exam.

There is no fixed Aviation salary in India, since the salary package for every job profile varies depending on the authority & responsibility, experience, demand of work, skills, etc. For instance, both the Pilot and Flight Attendant work for the Aviation industry, but their salary packages vary based on their nature of work. 

In fact, not every Flight Attendant gets the same salary package; their pay varies depending on the airline, route type, experience, and skills.

Under Civil Aviation, you'll find 3 major categories: Commercial air transport, which includes scheduled and non-scheduled passenger, cargo flights, etc.
Then Aerial work, in which aircraft are used for specialised services like agriculture, photography, surveying, rescue operations, etc. 
Lastly, General Aviation, where all other civil, private, or commercial flights are included.