I applied online. The process took 2 weeks. I interviewed at Amazon (Bengaluru) in Oct 2011
Interview
Throughout the interviews, the focus was almost entirely on Data Structures, Algorithms and problem solving.
First, there was an online test with 4 questions and about 2 hours time. We had to write code. Then they called me to their office for interviews. There were 2 rounds of interviews (lots of waiting, took almost 12 hours to get done) with a panel of 2 members each. Then, there was a phone interview with the hiring manager, and then one more interview at their office.
One good thing about the interview process was that the HRs conveyed the feedback from the previous interview immediately and kept me posted on how many interviews remained.
Interview questions [1]
Question 1
How do you check whether a given binary tree is a binary search tree or not?
Surprisingly easy — I expected tougher questions, but the coding round felt more like a warm-up. The main challenge was a DSA problem about counting islands in a 2D grid, which led to a discussion on DFS versus BFS and handling large grids. Funny enough, I had revisited that exact type of question while prepping on PracHub, which made me feel more confident. The interview wrapped up with a behavioral round, and I accepted an offer, but ultimately decided to decline it for another opportunity. Overall, it was a smooth experience.
Interview questions [1]
Question 1
Number of Islands — given a 2D grid of '1's (land) and '0's (water), count the number of connected islands. Walk through DFS vs BFS, and discuss how to avoid revisiting cells (in-place mutation vs visited set) and what changes if the grid is huge and must stream from disk.
It started with an OA, and then after a few weeks, I got invited to four rounds of interviews: technical and behavioral at 3 of the 4, and behavioral only at one.
Um teste de código online, se aprovado, vai para o loop. O loop é 4 entrevistas seguidas, duas em inglês e duas em português. 3 entrevistas técnicas de código, todas as 4 têm pergunta de liderança.
Interview questions [1]
Question 1
Pergunta historicas baseada nos principios de lideranca da amazon.
