Computer Science and Engineering › Javascript Functions MCQ › Question #4912
Single Choice Easy

QWhat does the following function do in JavaScript? 
function isPalindrome(str) {
str = str.toLowerCase();
return str === str.split('').reverse().join('');
}

ID: #4912 Javascript Functions MCQ 237 views
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#4912Q ID
EasyDifficulty
Javascript Functions MCQTopic
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  • A calculates the area of a circle ✔ ✖
  • B converts a string to uppercase ✔ ✖
  • C checks if a string is a palindrome ✔ ✖
  • D sorts an array in ascending order ✔ ✖
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Explanation

This function takes in a single argument, str, and uses the toLowerCase() method to convert the string to lowercase.
It then uses the split(), reverse(), and join() methods to check if the string is a palindrome (i.e., it reads the same forwards and backwards).

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