For air hostess exam in this you should to follow these critaria:-

(1) pass out in 12 board exam

(2) You should have mastery in spoken English

(3) Your age must be over 18 but not more than 30 years.

(4) In entrance exam they check about your general awareness and logical reasoning skills.

(5) You should have mastery in any one foreign language it may be English as well, they actually check your personality and they want to see in you that you are well determined for your duties as an air hostess.

You should have good communication skills and in the exams which are organized by airlines they check your aptitude skills in general level not master level.