They say that they'll wrap up in a day but they don't really. They'll call you early with your laptop make you wait for 30 minutes and then ask you to implement a authentication service with password login, google login, fb login etc etc in 3 hours which should be up and running. They'll say that you can write in any language but if you write in python, they end up saying that they dont know python, so they'll let you know. Then they ask you leave for the day and ask you to come again where they again make you wait 30 minutes and then they ask you simple questions. If you happen to answer quickly, they don't know what to do coz they are told to do interview for atleast 1 hour, so they ask you simple puzzles. If you answer them too, they let you go and say that they'll let you know. But they never give you an update so you have to keep following them up.