I applied online. The process took 2 weeks.

The process is very straightforward. You get an email from HR where they explain the full process.

• In the first phase, I got 6 problem sets where each problem set has to be answered in 30 minutes. In each problem set, it's usually multiple-choice questions. These questions are given to test the analytical ability of a person. So these are not technical at all. But you have to do some basic maths, so I suggest keeping your calculator close.
• After completing 6 problem sets, if your result is satisfactory, they give you 4 more problems. Two are technical coding problems, 1 is behavioral, and 1 is analytical. Besides this, I was asked to take a standardized test hosted by Alva Labs (Google it). HR explained the reasoning behind this standardized test phase in her mail. My suggestion here is that before entering a technical problem link, you should read the topic of that problem and try to learn as much as you can before entering to solve the problem. This will help.

I completed these two phases. It took a total of 3 hours for the first 6 problem sets, 3 hours for two technical questions (1.5 hours each), 1 hour for behavioral questions, 30 minutes for an additional analytical question set, and 30 minutes for a standardized test by Alva Labs. You cannot spend more time on solving these problems, as when you enter the problem, a clock starts, and you cannot pause that clock.

To be honest, I enjoyed solving both analytical and technical problems. But they informed me that other candidates did better than me in solving technical problems. It would be nice for me if I could know what I could have done better in the technical problems. But I understand they can't disclose more than this. Otherwise, it would be giving away solutions to their problems. So I don't have any complaint. As I understand, there might be better candidates than me who solved and explained their reasoning better than me.