Its casual, nothing fussy, they ask basic qns, basic computer skills,nothing much. They dont have any definite process. Its quite easy, good for starters. They are looking for your vocab skills, confidence levels etc.
I applied through a recruiter. The process took 2 days. I interviewed at TP (Lissabon, Lissabon)
Interview
phone conversation with regular questions . First one is easy. Then they change you the project and it is easy too... you just need to tell them what they want to know instead of what you really do think.
I applied through an employee referral. The process took 1 week. I interviewed at TP (Dallas, TX) in Aug 2017
Interview
Computer tests first and second interview Filling out the normal paperwork showing two forms of ids and orientation so it was a 2 hour process with an offer given no drug test and you were selected for a specific campaign