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ByteDance / TikTok Interview Questions

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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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Basic Calculator (with and without parentheses)

Implement a string calculator supporting +, -, *, / on integers. Variants range from no-parentheses (operator precedence only) to full infix with parentheses and unary minus.

string-processing

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Meeting Rooms III Meeting Rooms II Binary Tree Maximum Path Sum In-Memory Key-Value Store with Snapshot and Restore Most Frequent Element with Smallest-Value Tie Break Remove Duplicate Letters Number of Islands and Island Perimeter Number of Islands and Number of Distinct Islands Design Circular Queue Number of Islands with Large Map Follow-up Most Common Suffix / Longest Common Suffix Queries Shortest Path in a Grid with Obstacles Elimination Find Elements Appearing More Than One Third in a Sorted Array Reverse Nodes in k-Group Reverse Linked List Count Number of Nice Subarrays Remove Duplicate Letters Merge Intervals with Possibly Reversed Endpoints Count of Interesting Subarrays Reverse the Order of k-Groups in a Linked List Minimum Jumps to Reach Home Maximum Candies Allocated to K Children Longest Zigzag Path in a Grid Number of Islands LRU Cache with High Cache-Miss Follow-up Reverse Linked List in Groups of K Including the Last Partial Group Print Execution Order in a DAG and Detect Cycles Min Cost to Connect All Points Path Sum III variant on N-ary Tree Task Scheduler-like with Priority Queue

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