2 rounds phone screen(1 coding + 1 system design) and 4 rounds onsite interviews(1 coding + 1 design + 1 deep dive + 1 behavior). general good experience but need fast coding

The technical round kicked off with a question about finding the length of the longest substring without repeating characters. I felt prepared, and as we discussed my approach and time complexity, I could sense I was on the right track. Later, there was a behavioral round where I described my experiences and team dynamics. The wild moment came when I realized I had literally seen this exact problem on prachub.com during my prep a week earlier. Afterward, I received an offer, which I happily accepted. Overall, a rewarding experience.