Top 50 coding challenge Interview Questions
The most frequently asked coding challenge questions across all roles and companies, ranked by real interview frequency. Updated daily.
Reverse each word's characters while preserving the sentence's word order using a linear scan.
American Airlines
Pocket FmBBestPeers InfosystemReverse a singly linked list in place using constant extra space and return its new head.
TelesignFind the longest substring without repeated characters using a sliding window and last-seen index map.
CodeSignal
PhonepeReverse a non-negative integer arithmetically and determine whether the original number is a palindrome.
Zensar TechnologiesImplement stable merge sort to return an integer array in ascending order without using Python's built-in sorting.
Distyl AI
Camgian
Burns SheehanReverse the characters in a string using a loop without built-in reversal functions.
Itc Infotech
Peloton interactive
Technogen India Pvt.Reverse a singly linked list iteratively and recursively while preserving every node and returning the new head.
Netsuite
Macquarie GroupAAppLogic NetworksGenerate the first n Fibonacci numbers using an iterative O(n)-time algorithm.
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