X Software Engineer interview questions

Absolutely enjoyed interviewing with Twitter. I applied through a referral, had a couple of telephonic rounds with the manager followed by a full day on-site (6 rounds) at the HQ. The interviewers were all very intelligent, friendly and helpful. All the interviews were like discussions and it left like we were working together to solve the problems. The questions were not too difficult if you know your data structures and optimization was the key. Arrays, Trees, BFS/DFS, Dynamic Programing were strong topics. There were a couple of open ended distributed system design rounds which required good understanding of the topic. The HQ was amazing and the food absolutely rocked. The recruiter was very nice as well and kept me informed at every stage. The feedback was pretty quick and I was extended an offer within days after the onsite.