I applied through other source. The process took 2 months. I interviewed at Meta
Interview
First interview was coding (SQL and Python). No tricks but you need to be fast so train before hand, They give plenty of material and online resources so you can be prepared.
Second interview was a full day in house working on design problems. Plenty of whiteboard design exercises and coding,
I applied online. I interviewed at Meta (New York, NY)
Interview
Prepare technical concepts, and practice previously asked questions as much as you can find online. 4 rounds in the total process. It's easy as long as you just practice a LOT.
I had Python and SQL round for 30 minutes each. The interview was for 1 hour 30 minutes for SQL and 30 mins for python coding.
Completed 5 questions each but still got rejection email the next day.