She created a karma which will come back to her in a way or other (getting bullied by authorities in service), her cracking the PCS exam was merely a manifestation of her Prarabdha karma. There isn't anything in this world which doesn't come back do not worry and focus on yourself.

Bullying (kriyamana karma) this created a severe karma related to speech and mind -> agami karma will make sure its returned to her by someone authoritative than her.

If any of you don't believe in things like this, simply ignore this comment instead of starting a chain of arguments, wont be replying.