I applied online.

I applied through the UNSTOP contest, where we have to register for subsequent steps.

After registering, I received an email and a notification through the UNSTOP app about my first test, which was a mix of aptitude, CS fundamentals, physics, etc.

A few weeks later, I received a mail stating that I was chosen for my second test, which was also a mix of aptitude, reasoning, and higher level operating system concepts as well as DBMS concepts.

I passed the test and sat for the coding round as well, and a month later, I received a call from HR stating that I was selected for the interview; however, I did not make it.

The problem is Tree Of Space.