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.
I applied online. The process took 1 week. I interviewed at Amazon (Seattle, WA) in Mar 2014
Interview
Got an email saying I had to give 2 tech interviews of an hour each very next day. It said the tech will mainly be on data structure, algorithms and OOPS.
First interviews was a woman who was really nice and friendly. Asked me about my resume first then told that I had to code a few questions she asked.
1) Design a Singleton Class
2) Write an least complex alto to find the first least appearing letter in a given string.
3)I don't remember this question.
Second interviewer was straight to the point. As i picked up the phone he told me to open my email as he had sent a link to collabedit.com where I had to code.
1) Check whether two given binary trees are of identical(same depth and same values)
2) Given a log file which consists of timestamp, customer ID, page id visited by that particular customer. Write a function to return all customers who have visited 5 unique pages in last 30 mins.............And yes I dint get this code and entire interview got over in this question.......
I got 4 out of 5 programs asked in 2 interviews, I was not expecting to get selected as Amazon has very high standards but one morning got an email saying Amazon is extending internship offer to me.
Advice : Don't lose hope even if you don't know the exact code, let the interviewer know what thinking process is going on in ur brain. Big companies want people who can think. And give utmost importance to Data structure and Algorithms
Interview questions [1]
Question 1
2) Given a log file which consists of timestamp, customer ID, page id visited by that particular customer. Write a function to return all customers who have visited 5 unique pages in last 30 mins
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.
I applied online. I interviewed at Amazon (Calgary, AB) in Jun 2026
Interview
Online Assessment is the first step in the process. I didn’t have an HR phone screening and went straight to the OA after applying. It was sent to me about a week after I submitted my application.
Interview questions [1]
Question 1
The first question is LeetCode style algorithms question, and the second question gives a full stack repo (choice of Java, NodeJS, or Django) and asks to solve a backend issue which is causing a bug in the frontend. Unit tests must pass to pass the second question. You can run both backend/frontend indivdually or together