Dear Aspirant

No, a student with only having 12th qualified is not eligible to appear for AFCAT examination. One also need to have graduated to participate in AFCAT examination.
According to the eligibility criteria, one needs to have 60% in 12th with physics and mathematics and qualified graduation or engineering with minimum 60% marks or equivalent.

If you want to know more about it check out the link given in below https://www.google.com/amp/s/competition.careers360.com/exams/iaf-afcat/amp

Thank you