Booking.com Software Developer interview questions

I completed the assignment with 100% of the tests passed. I didn't hear back even after I contacted them 2 times asking what was the status of my application. Very unprofessional behaviour, especially after all the time spent applying.

0/5 would not recommend. You apply to the role, and without any interaction with a human being you will get a link to a HackerRank test. Only after you pass a test, someone will talk to you, but even then the communication is chaotic at best. If this is a part of the "selection process", then it is definitely working, because I have no desire to continue with this bollocks.