i was contatced by a consultancy acting for Facebook, had 2 screening rounds with them wherein they checked my language skills, after which i was informed that i have passed and will have a telephonic round of interview from fb. after that round i had a face to face round.

Phone screening only, typical questions about what is expected from the company, carwer plan, etc. But odd questions irrelevant to the job opening itself. It turned out that the role is only about reviewing facebook posts in a specific language,