← Software Engineering Interview Prep

Coding interview

Algorithms, data structures, and complexity — think aloud with Owl.

Session mode

LearnOwl teaches — full explanations, whiteboard, one question at a time.InterviewYou answer — Owl asks; toggle the expected answer on or off.Rapid fireShort prompts, quick scoring, keep moving.

Questions

Two Sum

Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target. You …

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Longest Substring Without Repeating Characters

Given a string s, find the length of the longest substring without repeating characters.…

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Merge Intervals

Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals and return an array of …

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Binary Tree Level Order Traversal

Given the root of a binary tree, return the level order traversal of its nodes' values (from left to right, level by lev…

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Number of Islands

Given an m x n 2D binary grid which represents a map of '1's (land) and '0's (water), return the number of islands. An i…