I applied online. I interviewed at Amazon (Bengaluru) in Apr 2025
Interview
Interview Process at Amazon:
I received a call from HR informing me about the interview process. The complete process consisted of the following rounds:
Online Test (Round 1):
This was the initial screening round.
It included 2 DSA coding questions:
One was based on Dynamic Programming (DP)
The other was based on Graphs
Technical Interviews (Rounds 2 & 3):
Two rounds focused on core data structures, algorithms, and problem-solving skills
Questions covered optimal approaches and real-time debugging
Interview questions [1]
Question 1
They asked me two DSA questions during the interview:
LeetCode 767 – Reorganize String:
I started by explaining the brute-force approach to the problem. After that, they asked me to come up with an optimal solution. I was able to derive the correct optimal approach during the discussion, but I couldn’t implement the most efficient version within the interview timeframe. At first, the problem seemed difficult under pressure, but in hindsight, it turned out to be quite manageable.
LeetCode 22: Generate Parentheses
I understood the problem well and was able to explain the optimized backtracking solution. However, due to time constraints, they didn’t ask me to write the code.
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.