Famous Interview Questions

⏱ 5 min read “You have been shrunk to the size of a pencil and dropped into a blender. The blades will start spinning […] Read article

⏱ 5 min read “How would you weigh a 747?” This is one of the cleaner brainteasers in the Microsoft canon — cleaner because, Read article

⏱ 5 min read You have an array where each element is a non-negative integer. Starting at index 0, the value at index i Read article

⏱ 7 min read Three system design problems anchor the modern interview canon: Design Twitter (or a news feed system), Design a URL Shortener Read article

⏱ 6 min read “How many piano tuners are there in Chicago?” This is the original Fermi problem, from which the entire genre of Read article

⏱ 6 min read You have an array of n+1 integers where each integer is in the range [1, n]. By the pigeonhole principle, Read article

⏱ 6 min read Given a 2D grid of letters and a list of words, find all words from the list that appear in Read article

⏱ 6 min read Design a data structure with two operations: get(key) — return the value if the key exists, else -1. put(key, value) Read article

⏱ 6 min read Google‘s hiring rubric in 2026 evaluates four dimensions: General Cognitive Ability (GCA), Role-Related Knowledge (RRK), Leadership, and Googleyness. The four-dimension Read article

⏱ 7 min read “If you were an animal, what would you be and why?” “If you were a tree, what tree?” “What superpower Read article

⏱ 6 min read “How many golf balls would fit inside a school bus?” was the most-cited Google brainteaser of the 2000s and the Read article

⏱ 6 min read Numbers arrive one at a time in a stream. After each number, return the median of all numbers seen so Read article

⏱ 6 min read You are presented with two indistinguishable envelopes. You are told that one contains twice as much money as the other. Read article

⏱ 6 min read Implement atoi: a function that converts a string to a signed 32-bit integer. This is LeetCode 8, and it is Read article

⏱ 7 min read You walk into the interview. The interviewer does not introduce themselves. They open with “Why are you wasting my time Read article