50 Game-Changing JavaScript Interview Questions & Answers
Prepare to ace your JavaScript interviews with our comprehensive guide featuring 50 essential questions, detailed solutions, free notes, and starter code. Whether you're just starting or prepping for advanced interviews, this resource will boost your confidence and skills!
Why This Guide is Special:
- Step-by-Step Solutions: We don’t just give you the answers; we guide you through each step of solving the problems.
- Free Notes: Handy notes on logic and JavaScript methods for better understanding.
- Starter Code: Get instant access to all the code through our free GitHub repository.
Example Question: Extracting Substring from a String
Question: Let's say we have a string with a length of 100. We need to find the characters between positions 20 to 45.
Requirements (Steps to Solve):
- Ensure the string has at least 45 characters.
- Extract the substring using JavaScript's
substring()method. - Handle edge cases where the string is too short.
Notes:
- .length: Used to check the size of the string.
- .substring(start, end): Extracts a portion of the string between two given indices.
- Edge cases handled by checking string length.
Solution:
const findCharsInRange = (str) => {
if (str.length < 46) return "String is too short";
return str.substring(20, 46);
};
const exampleString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor.";
console.log(findCharsInRange(exampleString)); // Output: "t amet, consectetur adipi"
