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Algorithms Interview Questions and Answers

Coding rounds test whether you can turn a problem into working code and talk about its cost. Start with a correct solution, state its time and space complexity, then improve it. Interviewers care about your reasoning as much as the final code.

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  • JavaScriptEasyCoding

    How do you check if a string is a palindrome in JavaScript?

    Normalise the string (lower case, remove non-alphanumeric characters), then compare characters from both ends moving inward with two pointers. This is O(n) time and O(1) extra space beyond the normalised copy.

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