I applied through a recruiter. The process took 2 weeks. I interviewed at Amazon (Londres, Inglaterra) in Nov 2012
Interview
They contacted me on LinkedIn and we planned a first phone screen where the interviewer asked me about my past experiences.
After that, I had a technical interview where he asked me to solve problems over the phone and think aloud so that he can understand the way I think.
Interview questions [1]
Question 1
He asked me to give him the algorithm for the Fibonacci number in both iterative and using recursion.
I failed to solve a problem regarding the algorithm of a rand7 function by using a rand5 function.
Interviewed for silicon team. Have only been asked about the domain specific knowledge in 1st round and system design in 2nd round and C coding in 3rd round.
The interviews were 50 mins each.
The phone screen went longer than expected, focusing heavily on implementation details. The interviewer really grilled me on my approach to a Least Recently Used (LRU) cache, asking how I'd combine a hashmap with a doubly linked list. I felt well-prepared since I had gone through system design examples on PracHub, which made me comfortable discussing eviction policies. The later rounds included more technical questions and behavioral interviews, but in the end, I received an offer, though I ultimately decided to decline. Overall, I’d say the process was average, with solid questions.
Interview questions [1]
Question 1
Design and implement a Least Recently Used (LRU) cache supporting get(key) and put(key, value) in O(1) average time. Walk through combining a hashmap with a doubly linked list, eviction policy when capacity is exceeded, and how you'd extend it to handle thread-safe concurrent access.
Recruiter reaches out after applying through Amazon careers, no referral. Had an initial OA, then after a month had four rounds in two days - three coding one system design. Each round had 30 min behavioral and 30 min coding.
Interview questions [1]
Question 1
Questions were mainly hashmap, sliding window and interval related.