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The Amazon Leadership Principles Interview Guide for Software Engineers

The definitive guide to Amazon Leadership Principles, by Amazon interviewers, based on data from 500 Amazon Leadership Principles interviews.

Technical Interview Resources

In-depth Solutions to Interview Questions

MEDIUM

Data Structures and Algorithms

LRU Cache

Implement an LRU Cache LRU = Least recently used cache

MEDIUM

Data Structures and Algorithms

Count Complete Tree Nodes

Given the root of a complete binary tree, return the number of nodes in the tree.

EASY

System Design

File Parsing

Given an inefficient file structure, how would you store data to efficiently look up the query? How would you alter this if you had many computers available?

EASY

Data Structures and Algorithms

Reverse String

Write a program to reverse the given string.

MEDIUM

Data Structures and Algorithms

Prefix Pairs

Given a list of words, match all words with other words from the list that are a prefix for the word.

MEDIUM

Data Structures and Algorithms

Most Frequent Element in an Array

Given an array of integers, find the most frequent element in the array. Write a method that takes an array of integers and returns an integer. If there is a tie, you can just return any.

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