pripremljen

1. (of a person) prepared; ready
   Došao je na ispit dobro pripremljen. — He came to the exam well prepared.
   Nismo bili pripremljeni za takvu vest. — We weren't prepared for news like that.
2. (of food, things) prepared; ready-made
   Ručak je već pripremljen, samo ga podgrej. — Lunch is already made, just heat it up.

The purpose takes za + accusative: pripremljen za ispit.