Decagon Coding & Algorithms Interview Questions
Practice the exact questions companies are asking right now.
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Enumerate 4x4 Tic-Tac-Toe Games
You are given an empty 4x4 board. Two players, X and O, alternate turns, with X moving first. A player wins as soon as they create three consecutive m...
Design rolling-window conversation score tracker
Design a class that tracks conversation scores over a rolling time window. Requirements You are given a window size W (in seconds) at initialization t...
Compute exclusive CPU time from nested logs
You are given logs from a single-threaded CPU that runs n functions (IDs 0 to n-1). Each log entry is a string in the format: - "functionId:start:time...
Design Sliding-Window Average Tracker
Design a class that tracks records in a sliding time window. Implement the following API: - init(time_window): initialize the object with a window siz...
Design a Tic-Tac-Toe Engine
Implement an n x n Tic-Tac-Toe game engine for two players. Support a method move(row, col, player) that records a move and returns whether that move ...
Implement CSAT tracking and call timing
You were asked to solve two coding problems. Problem 1: Implement a rolling CSAT tracker Implement a class CSATTracker for customer-satisfaction score...