I recently gave the online assessment for 2022 Twitter Internship Coding Challenge
These were the questions that i received:





Note : This 4th questions is different from Palindromic Substring for this you need to find total and for the problem you need to find distinct.
My other friend got this problem Game Events
Some of the 2021 oa questions resources from leetcode:
https://leetcode.com/discuss/interview-question/1491637/Twitter-or-Coding-Round-or-Closest-Numbers
https://leetcode.com/discuss/interview-question/1488062/Twitter-2022-OA-Early-Career
https://leetcode.com/discuss/interview-question/1491641/Twitter-or-Coding-Round-or-Array-Game
https://leetcode.com/discuss/interview-question/1496982/twitter-oa-early-career-2022
https://leetcode.com/discuss/interview-question/1495706/twitter-oa-2022-twitter-early-career-engineering-coding-challenge
https://leetcode.com/discuss/interview-question/1499675/twitter-oa-early-career-2022
https://leetcode.com/discuss/interview-question/1033712/Twitter-OA-2021-New-Grad/830572
https://algomonster.medium.com/twitter-online-assessment-questions-2021-twitter-oa-hackerrank-3a62863814d4
Questions before oa conducted in hackerrank:
https://leetcode.com/discuss/interview-question/425440/Twitter-OA-2019-Questions
This is the resource that helped me a lot and this is a very good resource also see discussions there you can find good resources.
https://leetcode.com/discuss/interview-question/1346837/Decryption_using_key_phrases-of-HackerRank-twitter
https://leetcode.com/discuss/interview-question/1343299/Missed-Chapters-HackerRank-twitter-and-HCl
https://leetcode.com/discuss/interview-question/1467769/Twitter-Stickers-problem
https://leetcode.com/discuss/interview-question/1487965/Twitter-Coding-Question-Vacate-hosts-in-Rack
https://www.1point3acres.com/bbs/collection/232531
There are also a few of 2019 and 2020 posts i missed them.Have a look at them if you find those.I will post some of the new ones if i find anything new.Notify me if you see anything new.
So topic wise we can expect a greedy and a dp question and arrays or string mostly from other 2.
Some of the frequent twitter questions(Last 6 months):
Tweet Counts Per Frequency (38 times): https://leetcode.com/problems/tweet-counts-per-frequency/
Design Log Storage System (8 times): https://leetcode.com/problems/design-log-storage-system/
Insert Interval (7 times): https://leetcode.com/problems/insert-interval/
Maximum Number of Occurrences of a Substring (7 times): https://leetcode.com/problems/maximum-number-of-occurrences-of-a-substring/
Reaching Points (7 times): https://leetcode.com/problems/reaching-points/
Insert Delete GetRandom O(1) (7 times): https://leetcode.com/problems/insert-delete-getrandom-o1/
Maximal Square (6 times): https://leetcode.com/problems/maximal-square/
K-diff Pairs in an Array (5 times): https://leetcode.com/problems/k-diff-pairs-in-an-array/
The kth Factor of n (4 times): https://leetcode.com/problems/the-kth-factor-of-n/
Two Sum (4 times): https://leetcode.com/problems/two-sum/
Minimum Increment to Make Array Unique (4 times): https://leetcode.com/problems/minimum-increment-to-make-array-unique/
Find Median from Data Stream (4 times): https://leetcode.com/problems/find-median-from-data-stream/
Find Pivot Index (3 times): https://leetcode.com/problems/find-pivot-index/
Minimum Swaps to Group All 1's Together (3 times): https://leetcode.com/problems/minimum-swaps-to-group-all-1s-together/
Meeting Rooms II (3 times): https://leetcode.com/problems/meeting-rooms-ii/
The Skyline Problem (3 times): https://leetcode.com/problems/the-skyline-problem/
Word Search II (3 times): https://leetcode.com/problems/word-search-ii/
Merge Intervals (3 times): https://leetcode.com/problems/merge-intervals/
Merge k Sorted Lists (3 times): https://leetcode.com/problems/merge-k-sorted-lists/
Minimum Knight Moves (2 times): https://leetcode.com/problems/minimum-knight-moves/
Also:
How many of you gave oa already?? If so did you receive any further communication regarding interview?.Also does anyone know about any past experiences regarding Twitter's response time for these applications and selection of interns?
For those who are really looking for career opportunities at Twitter, try to get a referral which is more effective rather than applying through careers portal. because i am hearing a lot from 2019 oa people that eventhough they solve all the problem they didn't receive any further communication.I think it will be same this year too.Even if you complete all questions it doesn't gurantee you a call.This is what i am hearing from many people