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BasicJavaScript~7 min

Check if a string is a palindrome

Very common first coding question for QA automation roles

Points available

100/100

Your mission

  1. Read
  2. 2Run
  3. 3Submit
  4. 4Solve

Write isPalindrome(str) that returns true if the string reads the same forwards and backwards.

Ignore case and any non-alphanumeric characters.

Examples

isPalindrome("Madam") → true
isPalindrome("A man, a plan, a canal: Panama") → true
isPalindrome("QA") → false

Hints

Each hint costs 10 points on a full solve.

Interviewer follow-ups

  • Can you do it without creating a new string?
  • Which test cases would you write for this function?

Ctrl+Enter to run · add Shift to submit

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Tab inserts two spaces. Press Escape, then Tab, to leave the editor.
Terminal

$ node solution.js

Run executes the open file. Submit scores solution.js against hidden tests.

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