Salary Sales Executive - Having an interview on Skype - need advices!

Hello,
i just received an email with an offer for sales executive in a hotel.they want to do the interview via skype. somebody can give me some advises?for me its completly new. i am very curios how its working what they are asking.as well i want to know if somebody knows more or less the salary for this position?
how i know that they give me a good conditions?

The most common questions the interviewer ask How to Answer the Most Common Interview Questions

The minimum salary required to bring family in qatar is QR 10000. Housing range starts from Minimum QR 5000 (Single Bed room Apartment) . Provide Transportation allowance or Transport Service by the employer. 
The Employer should pay round the trip annual tickets, One month vacation with paid salary. 

For More Information check this Cost of Cost of living in qatar

Good luck with your interview.

Try to make sure that you are in a quiet room for the interview also consider what is behind you in the camera view so that you create a good impression.

Good Luck