Amazon SDE-1 Interview Exp

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June 10, 202529 reads

Summary

I successfully navigated a challenging multi-round Amazon SDE-1 interview process, which included online assessments, multiple technical Data Structures & Algorithms (DSA) rounds, and extensive Leadership Principle discussions, ultimately culminating in a job offer.

Full Experience

Hey everyone,
Super thrilled to relive the rollercoaster that was my Amazon SDE-1 interview experience. Because who doesn't love a multi-round endurance test where your sanity, problem-solving, and caffeine tolerance are all judged simultaneously? Let's dive into the magic!

Round 1 - Online Assessment

I had two DSA questions and several Leadership Principle (LP) questions. Miraculously, I managed to solve both coding problems without setting my laptop on fire and even pretended to be a functioning adult during the behavioral questions. Apparently, I fooled them well enough because within a week, I got the call — you know, the one where they tell you you're being blessed with entry into the legendary interview loop. Dreams do come true, folks.

Round 2 - DSA + Leadership Principles

Ah yes, the legendary interview loop—because what better way to test your soul than by starting with two DSA questions right off the bat? The first one was a delightful tree-based puzzle (Medium), just the kind of thing you dream about at 3 AM. Then came a string DP question (Medium-Hard), which of course, was as friendly as a cat that secretly hates you. And just when my brain cells thought they'd earned a break, bam—Leadership Principle questions! Because nothing says “fun” like recalling a time I "disagreed and committed" while my neurons are still recovering from recursive traversal. Thankfully, I managed to solve both DSA problems without summoning dark forces, and handled the LP questions like a seasoned STAR-teller.

Round 3 - DSA + Leadership Principles

This round? Oh, just a charming sequel to the second—because who doesn't love reruns with slightly different nightmares? The first question was a relaxing graph traversal challenge inspired by the ever-so-fun Flood Fill algorithm. Nothing like coloring pixels with DFS while my brain’s screaming “why me?” Then came a wholesome linked list classic—yes, the one where you get to copy a list with random pointers. Because clearly, solving puzzles with next and random pointers is what we all signed up for when we chose software development as a career: https://leetcode.com/problems/copy-list-with-random-pointer/. Of course, the round wouldn’t be complete without another round of Leadership Principle grilling. Because if you’re not explaining how you “earned trust” right after debugging pointer madness, are you even Amazon material? Still, somehow, I solved both DSA problems and navigated the LP questions like I had my life together. Fake it till you make it, right?

Round 4 - System Design + Leadership Principles + DSA

Ah, the final round—where things start off all warm and fuzzy with a friendly chat about my resume and projects. You know, just a light interrogation disguised as conversation. Then came the Leadership Principles—this time laser-focused on “ownership,” “problem-solving,” and everyone’s favorite: “handling ambiguous situations” (a.k.a. making decisions when you have zero idea what’s going on—classic Tuesday energy). The interviewer really leaned into some of my answers, like a detective trying to crack a cold case. But I smiled, nodded, and deployed the good ol’ STAR format like it was a Marvel superpower. And just when I thought I could coast to the finish line? Boom—plot twist. A DSA question appeared, dressed up in a fancy story, but spoiler alert: it was just the good old inversion count problem in disguise. Yep, Inversion-count-in-array-using-merge-sort. Managed to wrangle that one too, pretending I wasn’t mentally rearranging my post-interview nap schedule.

And then… drumroll... after a week of refreshing my inbox like it was a limited-edition sneaker drop, I finally got the call from the recruiter.

“Congratulations, you’ve been selected for the SDE-1 role at Amazon.”

Ah yes, the sweet reward for surviving a multi-stage brain olympics, decoding random pointer riddles, and narrating my life story in STAR format like it was a Netflix original. All worth it—because nothing screams inner peace like knowing you're now part of the system that made you jump through flaming algorithmic hoops.

Interview Questions (3)

Q1
Graph Traversal (Flood Fill)
Data Structures & Algorithms

During one of my technical rounds, I was presented with a graph traversal challenge inspired by the Flood Fill algorithm. The task involved a scenario where I had to effectively 'color' or process connected components, similar to how one might fill pixels in an image using Depth-First Search (DFS).

Q2
Copy List with Random Pointer
Data Structures & Algorithms

I was asked to implement a deep copy of a linked list where each node contains two pointers: 'next' which points to the next node in the list, and 'random' which could point to any node in the list or null. This is a classic problem often found on LeetCode and tests understanding of linked lists and pointer manipulation.

Q3
Inversion Count in Array
Data Structures & Algorithms

In the final round, I encountered a DSA question presented within a narrative story. After analyzing the problem, I realized it was a disguised version of the classic 'Inversion Count in Array' problem, where the goal is to count pairs of elements (i, j) such that i < j and arr[i] > arr[j].

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