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ByteDance / TikTok Interview Question Bank
ByteDance / TikTok runs a strict one-round-at-a-time funnel with sharp org-by-org variance in bar, language, and round mix. Coding rounds skew toward classic LeetCode-medium with one self-built test case; MLE and SRE loops front-load 30+ minutes of oral 八股 before any code is written. Interviewer professionalism varies — strong candidates drive the round structurally rather than waiting to be assessed.
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OJ Problems
practice in the online judgeMin Cost to Connect All PointsPath Sum III variant on N-ary TreeTask Scheduler-like with Priority QueueLowest Common Ancestor with Parent Pointers (O(1) extra space)Write a Shell Script (On-site)Delete a length-k subarray to minimize the smallest valid index (sliding window variant)Word Search II (find all words on board)Maximum Candies with At Most Two Types in a LineLRU Cache with TTL ExpirationWater Jug: Reachability and Shortest Operation SequenceConcurrency Coding: Implement Thread-Safe Components Using Locks and AtomicsGrid/Graph BFS/DFS: Return Distance and the Farthest (Max) PointMove ZeroesPlus One (Array of Digits)Binary Search on a Sorted Array (Find Target)Reverse Nodes in k-Group (reverse even if last group size < k)Best Time to Buy and Sell Stock (with follow-up for multiple transactions)SQL: Longest Consecutive Login Days per UserTop-K KOL by Like Count (Heap Optimization)Implement HashMap put/get with Optimal Rehash StrategyDetermine Players with Unique Ranks from Match Results (Reachability Counts in a Directed Graph)AI-Native Coding Interview (Round 2)AI-Native Coding Interview (Round 1)Design an LRU CacheBasic Calculator IIAdd Strings (character array variant)Trie / Prefix Tree Problem (Insufficient Details)LeetCode-Style Coding Problem (Implement and Pass Provided Tests)Alien Dictionary (Order Derivation)Binary Tree Side View Variant