Hello Vijay,

Hope you are doing well.

Traveling Ticket Examiner(TTE) role is to check the tickets of the passenger on board. Apart from this, it is the duty of TTE to assist the passengers for any queries like seats, food, refreshments etc.

They are called as Traveling Ticket Regulators(TTR) in South India.

Eligibility criteria for becoming TTE in Railways is as such:

Candidates after completion of class 10th or 12th can apply for this post. There are different zone for Indian railway based on the region. The Railway Recriutment Boards of different Railway zones frequently take exams of TTE.
To become TTE you have to appear in this examination. After clearing the examination you have to clear interview and medical examination. After that you will go through a training. Then you can work as a TTE.

Hope this helps you. All the best!