Problem database last updated: June 20, 2025
5 problems · 2 Easy, 2 Medium, 1 Hard · Ranked #249 of 458
2 Easy
40% · avg 23%
2 Medium
40% · avg 59%
1 Hard
20% · avg 18%
Based on 5 reported problems, Twitch interviews are in line with industry averages - 20% Hard vs 18% overall.
Compared to the industry average, Twitch puts unusual emphasis on design (40% of problems, 6.9x the industry average), two-pointers (40% of problems, 2.9x the industry average), hash-table (60% of problems, 2.7x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are hash-table (60%), string (60%), design (40%), two-pointers (40%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
LRU Cache Design a data structure that follows the constraints of a Least Recently Used (LRU) cache. | Medium | Very Likely | hash-tablelinked-listdesign | Solve |
Reverse Vowels of a String Given a string s, reverse only all the vowels in the string and return it. | Easy | Likely | two-pointersstring | Solve |
Letter Combinations of a Phone Number Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order. | Medium | Likely | hash-tablestringbacktracking | Solve |
Find Median from Data Stream The median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value, and the median is the mean of the two midd... | Hard | Likely | two-pointersdesignsorting | Solve |
Unique Email Addresses Every valid email consists of a local name and a domain name, separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+'... | Easy | Likely | arrayhash-tablestring | Solve |
LRU Cache
SolveDesign a data structure that follows the constraints of a Least Recently Used (LRU) cache.
Reverse Vowels of a String
SolveGiven a string s, reverse only all the vowels in the string and return it.
Letter Combinations of a Phone Number
SolveGiven a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.
Find Median from Data Stream
SolveThe median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value, and the median is the mean of the two midd...
Unique Email Addresses
SolveEvery valid email consists of a local name and a domain name, separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+'...
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Twitch interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Twitch interviews focus heavily on hash-table, string, design problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Twitch interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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Twitch has been reported to ask 5 distinct coding problems. The most common topics are hash-table, string, design. 2 are Easy difficulty, 2 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 5 reported problems, Twitch interviews are in line with industry averages - 20% Hard vs 18% overall. 40% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: hash-table, string, design. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
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