JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Solution - Check whether a String Is a Palindrome

The video tutorial guides viewers through creating a JavaScript function to check if a string is a palindrome. It starts with setting up the function and logging initial outputs. The instructor then builds the logic to compare strings, addresses edge cases like spaces and case sensitivity, and uses regular expressions to refine the solution. The tutorial concludes with final adjustments and testing to ensure the function works correctly.

What is the primary purpose of the palindrome function introduced in the video?

• To convert a string to uppercase

• To count the number of characters in a string

• To check if a string is a palindrome

• To reverse a string

What is the first step in building the palindrome logic?

• Logging the string to the console

• Converting the string to uppercase

• Reversing the string

• Splitting the string into two arrays

Why is it important to reverse one of the arrays in the palindrome function?

• To remove spaces from the string

• To convert the string to lowercase

• To sort the characters alphabetically

• To compare the original string with its reverse

What issue was identified when checking if the string is a palindrome?

• The string was not being split correctly

• The function was not returning any value

• Spaces in the string were causing incorrect results

• The function was not logging the string

How does the function handle case sensitivity?

• By ignoring case sensitivity

• By using a case-sensitive comparison

• By converting the string to lowercase

• By converting the string to uppercase

What method is used to remove non-alphanumeric characters from the string?

• join()

• replace() with regular expressions

• split()

• toUpperCase()

What was the final issue addressed in the solution?

• Handling of underscores

• Handling of spaces

• Handling of special characters

• Handling of numbers

What does the backslash W (\W) in regular expressions represent?

• All alphanumeric characters

• All uppercase characters

• All whitespace characters

• All non-alphanumeric characters

Why was the regular expression syntax modified in the final solution?

• To exclude spaces

• To include special characters

• To exclude underscores

• To include numbers

What is the final outcome of the palindrome function?

• It logs the string to the console

• It returns true if the string is a palindrome, false otherwise

• It returns the reversed string

• It converts the string to lowercase