Bytedance Software Engineer Coding & Algorithms Interview Questions
Practice 36 real Coding & Algorithms interview questions for Software Engineer roles at Bytedance.
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Reverse Words While Preserving Spaces
Implement a C++ function that reverses the order of words in a string. Assume a word is any maximal sequence of non-space characters, and the input co...
Compute root-to-leaf number sum
This question evaluates understanding of binary tree data structures and the competency to aggregate values along root-to-leaf paths, combining tree t...
Find Minimum Time Across a Grid
This question evaluates algorithm design and problem-solving skills related to grid-based reachability with time-dependent constraints, assessing the ...
Assign Meetings and Find the Most-Used Room
Assign Meetings and Find the Most-Used Room There are n rooms numbered from 0 through n - 1 and meetings [start, end] with distinct start times. Proce...
Solve Search Speed and String Product
You are asked to solve two coding problems. Problem 1: Find the Minimum Constant Processing Speed You are given an array piles, where piles[i] is the ...
Build a validated add-sub calculator
Given a string expression, write a function that validates and evaluates it. The expression represents arithmetic using only non-negative integers and...
Count Similar Photo Groups
You are given n photos labeled 0 to n - 1 and an n x n binary matrix isSimilar. - isSimilar[i][j] = 1 means photo i and photo j are directly similar. ...
Elements Occurring More Than n/3 Times in a Sorted Array
You are given a sorted (non-decreasing) integer array nums of length n, where n >= 3. Return every distinct value that occurs strictly more than n / 3...
Course Schedule Feasibility
This question tests graph traversal skills and the ability to detect cycles in a directed graph, a core competency in algorithm interviews. It falls u...
Find the Best Word for a Query Suffix
Practice a Bytedance coding interview problem focused on find the best word for a query suffix. The prompt emphasizes edge cases, clean implementation...
Shortest Path in a Grid with Limited Obstacle Removal
This question evaluates a candidate's ability to extend classic breadth-first search into a state-augmented shortest-path problem, where the state inc...
Find Words in a Character Grid
Implement findWords(board, words) for a word-search game. You are given an m x n grid of lowercase English letters and a list of lowercase dictionary ...
Implement an LRU Cache
This question evaluates competency in designing efficient stateful data structures, understanding cache eviction policies (least recently used), and m...
Compute square root with precision
Given a non-negative integer val and a non-negative integer precise, compute the square root of val without using any built-in square-root function. R...
Find Missing Ranges with Bounds
Given a sorted array of distinct integers nums and two integers lower and upper that define an inclusive interval [lower, upper], return all maximal r...
Validate a bracket string
Given a string s containing only the characters '(', ')', '{', '}', '[', and ']', determine whether the input string is valid. A string is valid if: 1...