Hello,
I assume you are asking about entries to get into Indian Air Force.
There are various entries to join IAF as officer or soldiers after class XII and after graduation.
After Class XII:

• NDA Exam: conducted twice a year (officer level)
• Air Force X and Y group (Airmen level)

After graduation

• CDSE Exam (officer level)
• AFCAT Exam (officer level)

Good luck