Hello Abhishek,

Hope you are doing well.

As per your query, You can join IAF by giving exams like NDA and IAF Group X and Y.

Since diploma is not considered as equivalent to any graduation and therefore you are not eligible for exams such as AFCAT, CDS etc.

Eligibility criteria for NDA exam :

For NDA 1 & 2-

Age limit : 16.5 to 19.5 years

Education qualification : 12th pass or appearing

Eligibility criteria for IAF Group X & Y:

After completing their class 12th exams candidates can also join the Indian Air Force through the Airmen Group X and Y entry. This exam is also conducted twice every year. Candidates fulfilling the Airmen Group X and Y eligibility criteria can fill the Airmen Group X and Y application from. The upper age limit to appear for this exam is 21 years.

Group X (Except Education Instructor Trade) -  Passed Intermediate/ 10+2/ Equivalent examination with Maths, Physics and English

Group Y (Except Automobile Technician, GTI, IAF(P), Musician and IAF(S) -Passed Intermediate/ 10+2/ Equivalent Exam in any stream with minimum 50% marks and 50% marks in English

Group Y (Medical Assistant Trade ) -Passed 10+2/Intermediate/ equivalent exam with Physics, Chemistry, Biology and English with a minimum of 50% marks and 50% marks in English.

For further relevant information related to joining Indian Air force, please visit the link provided below:

https://competition.careers360.com/articles/how-join-indian-air-force

Hope this helps you. All the best!