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Companies / TikTok

TikTok interview questions

Explore questions associated with TikTok. Review the source details, then use the workspace for code, notes, and diagrams.

94 questions in the library. A source association does not guarantee a future interview question.

Behavioral and leadership · Coding · Machine learning · Object-oriented design · Other questions · System design

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TikTok interview questions | SysRound

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94 questions

Showing 1–25

System designDifficulty not specified
Design a Metrics Aggregator
Design a metrics aggregation system that collects count-based metrics (like user signups, system errors, ad clicks) from services via a client library and displays them…
Companies: TikTok, Amazon, DoorDash, Google +10
Last reported Oct 2026
Open workspace
System designDifficulty not specified
Design a TikTok Live Coin Tracking System
Design a virtual gifting and coin tracking system for a live-streaming platform that allows users to send virtual gifts in real-time, tracks creator earnings per…
Companies: TikTok
Last reported Sep 2026
Open workspace
Other questionsDifficulty not specified
why TT? Why you want change a job? Resume projects
why TT? Why you want change a job? Resume projects

Page 1 of 4

Companies: TikTok

Last reported Sep 2026

CodingDifficulty not specifiedLeetCode 101

Symmetric Tree

Check whether a binary tree is symmetric around its center by determining if the left and right subtrees are mirror images of each other. This…

Companies: TikTok, Apple, LinkedIn

Last reported Aug 2026

CodingMediumLeetCode 721

Accounts Merge

Given lists of accounts where each account has a name and emails, merge accounts that share any email by grouping connected emails (e.g., via union-find…

Companies: TikTok, Airbnb, Bloomberg, Meta +1

Array · Breadth-First Search · Depth-First Search · Hash Table

Last reported Aug 2026

CodingMediumLeetCode 236

Lowest Common Ancestor of a Binary Tree

Given a binary tree and two nodes p and q, find their lowest common ancestor (LCA) — the deepest node that has both p and…

Companies: TikTok, Amazon, Apple, Atlassian +6

Binary Lifting · Binary Tree · Depth-First Search · Lowest Common Ancestor

Last reported Jul 2026

CodingDifficulty not specified

Easy leetcode question, but doesn't allow language choice.

Companies: TikTok

Last reported Jul 2026

CodingMediumLeetCode 694

Number of Distinct Islands

Given a binary grid, count how many distinct island shapes (connected components of 1s via 4-directional adjacency) appear, treating two islands as identical if they…

Companies: TikTok, Anduril, Oracle

Array · Breadth-First Search · Depth-First Search · Hash Function

Last reported Jun 2026

CodingDifficulty not specified

dive deep to your project and ask questions around it, leetcode mediuem level coding

Companies: TikTok

Last reported Jun 2026

Other questionsDifficulty not specified

what is bfs and dfs

Companies: TikTok

Last reported Jun 2026

CodingMediumLeetCode 1926

Nearest Exit from Entrance in Maze

Given a grid maze with walls ('+') and empty cells ('.'), find the minimum number of up/down/left/right moves from the given entrance to the nearest…

Companies: TikTok, Meta

Last reported Apr 2026

System designDifficulty not specified

Design a Video Moderation System

Design a video moderation system for a global platform like TikTok that can ingest millions of daily video uploads, apply ML-based risk scoring and rule-based…

Companies: TikTok

Last reported Apr 2026

CodingDifficulty not specified

Leetcode question. Then try to improve time complexity.

Companies: TikTok

Last reported Apr 2026

Object-oriented designDifficulty not specified

Design a meeting room booking system

Design a meeting room booking system that allows users to create meeting rooms with defined capacities, book available rooms for specific time intervals, and prevent…

Companies: TikTok, Amazon, Autodesk, Locus

Last reported Mar 2026

Other questionsDifficulty not specified

Deep dive into your past project architecture

Companies: TikTok

Last reported Feb 2026

Other questionsDifficulty not specified

How does AI streaming works

Companies: TikTok

Last reported Feb 2026

CodingDifficulty not specified

Mostly medium Leetcode-typed coding questions

Companies: TikTok

Last reported Feb 2026

System designMedium

Design Online Auction System

Design an auction system where users can create auction posts for items, place bids, view top bidders, and receive notifications when auctions end.

Companies: TikTok, Adobe, Apexx Global, Intuit +1

System Design

Last reported Oct 2025

CodingMediumLeetCode 200

Number of Islands

Count the number of islands (4-directionally connected components of '1's) in an m×n binary grid. This is a connected-components/flood-fill problem typically solved with…

Companies: TikTok, Amazon, Anduril, Apple +16

Array · Breadth-First Search · Depth-First Search · Matrix

Last reported Sep 2025

System designDifficulty not specified

Design a System Metrics Monitoring and Alerting Platform

Design a metrics monitoring platform that collects performance data (CPU, memory, throughput) from hundreds of thousands of servers, allows users to set threshold-based alerts…

Companies: TikTok, Amazon, Databricks, Digitalocean +10

Last reported May 2025

CodingMediumLeetCode 208

Implement Trie (Prefix Tree)

Implement a trie (prefix tree) that supports insert, exact-word search, and prefix search for lowercase English words. Each operation should run in O(length) time per…

Companies: TikTok, Nielsen

Last reported Mar 2025

System designDifficulty not specified

- 1st round was simple 1D dp problem - 2nd round was graph problem (Djikstra's) and ML system design

- 1st round was simple 1D dp problem - 2nd round was graph problem (Djikstra's) and ML system design

Companies: TikTok

CodingDifficulty not specified

2 Leetcode questions were asked

Companies: TikTok

CodingDifficulty not specified

A question around around array and number and SQL about counting employee salary and showing them in descending order

Companies: TikTok

CodingMediumLeetCode 863

All Nodes Distance K in Binary Tree

Given a binary tree and a target node value, return all node values at distance K from the target. The challenge is to traverse both…

Companies: TikTok, Amazon, Meta, Microsoft

Binary Tree · Breadth-First Search · Depth-First Search · Hash Table