After applying, you get an OA. If you pass the OA, you move forward to the first round, which consists of 2 very easy questions and implementing some logic for a game (important for your code to be functioning here). This round is about ~1.75 hours.

The next round is the final round, which is two back-to-back 1 hour interviews. The first part consists of DSA (2 LC meds/hard). The second round consists of behavioral+class design. The class design implementation gets hard each time.

Overall, expect to dedicate ~5 hours for everything. Seems ridiculous given the pay and the prestige of the company.

Be sure to study graphs and DP (final round).