TikTok interview questions

43 questions20 coding5 system design18 behavioral5 freeUpdated

This is every question in the TikTok guide, in one list: 20 coding problems, 5 system designs and 18 behavioral questions, drawn from what candidates report about TikTok interviews.

Each row shows the round it comes from and links to the lesson that works through it. 5 are free to read in full. The other 38 are Premium, and here you still see their round, difficulty and topic, so you know what you're walking into.

TikTok coding interview questions

20 problems, in the order the guide teaches them. Each lesson gives the full problem, a worked solution and the follow-ups interviewers tend to add.

1Subarray Sum Equals K: Prefix Sum and a Count MapFreeMediumArrays, Strings & Windows
2Decode String: Stack-Based ParsingFreeMediumArrays, Strings & Windows
3Maximum Points You Can Obtain from Cards: Minimize the Middle WindowFreeMediumArrays, Strings & Windows
4Longest Substring with At Least K Repeating Characters: Fix the Distinct CountFreeMediumArrays, Strings & Windows
5Premium medium problemMediumMonotonic Stack & Deque
6Premium hard problemHardMonotonic Stack & Deque
7Premium medium problemMediumMonotonic Stack & Deque
8Premium medium problemMediumTrees & Graphs
9Premium medium problemMediumTrees & Graphs
10Premium medium problemMediumDynamic Programming
11Premium medium problemMediumDynamic Programming
12Premium medium problemMediumDynamic Programming
13Premium hard problemHardHeaps & Intervals
14Premium medium problemMediumHeaps & Intervals
15Premium medium problemMediumHeaps & Intervals
16Premium medium problemMediumHeaps & Intervals
17Premium medium problemMediumData-Structure Design
18Premium easy problemEasyData-Structure Design
19Premium easy problemEasyData-Structure Design
20Premium easy problemEasyData-Structure Design

TikTok system design interview questions

5 designs, each worked end to end in its own lesson, from requirements to the architecture and its trade-offs.

#Question
1Design the For You FeedFree
2Design Short-Video Upload & Delivery (Premium)
3Design TikTok LIVE (Premium)
4Design a Notification System (Premium)
5Design Ad Ranking & Delivery (Premium)

A lock means the design is named here and its walkthrough is Premium.

TikTok behavioral interview questions

18 questions, grouped by what the interviewer is testing. The lesson explains why each one gets asked and what a strong answer covers.

Why TikTok and ByteDance (3)

All 3 are Premium

Speed and ownership (Always Day 1) (3)

All 3 are Premium

Data and judgment (Seek Truth and Be Pragmatic) (2)

All 2 are Premium

Conflict and feedback (Be Candid and Clear) (3)

All 3 are Premium

Failure and influence (Be Courageous and Aim for the Highest) (3)

All 3 are Premium

Working across cultures (Champion Diversity and Inclusion) (2)

All 2 are Premium

Leadership and resilience (Grow Together) (2)

All 2 are Premium

Read the TikTok behavioral questions

See all 43 TikTok questions by name

Premium opens the 38 locked questions on this page, each with the full prompt and a worked answer, and every other lesson in all 100 company guides.

Common questions

How many questions are in the TikTok interview guide?

43: 20 coding problems, 5 system designs and 18 behavioral questions. The guide was last updated in November 2026.

Which rounds do these TikTok interview questions come from?

All 20 coding problems come from the coding rounds. The 5 system designs and 18 behavioral questions come from the system design and behavioral rounds. Every row in the list carries its round, so you can start with the one you have booked.

Which TikTok interview questions are free?

5 of the 43 are free to read in full, marked Free in the list. The other 38 come with Premium, which also opens all 100 company guides.