JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - charChodeAt and fromCharCode with JavaScript

This video tutorial covers the use of UTF-16 encoding in JavaScript, focusing on the charCodeAt and fromCharCode methods. It explains how these methods can be used to manipulate string values by converting characters to their corresponding UTF-16 code units and vice versa. The tutorial provides examples to illustrate these concepts and discusses their practical applications, such as generating missing alphabet letters. The lesson concludes with an encouragement to experiment with the methods and prepare for the upcoming exercise.

What is the range of integers returned by the charCodeAt method in JavaScript?

• 0 to 255

• 0 to 1023

• 0 to 65535

• 0 to 32767

Which method in JavaScript is used to find the UTF-16 code of a character at a specific index?

• charCodeAt

• charAt

• indexOf

• fromCharCode

If the UTF-16 code for 'A' is 65, what will be the output of String.fromCharCode(65)?

• 'B'

• 'A'

• 'C'

• 'D'

What is the purpose of the fromCharCode method in JavaScript?

• To find the index of a character

• To convert a character to its UTF-16 code

• To convert a UTF-16 code to a character

• To split a string into an array

How can understanding UTF-16 codes be beneficial in JavaScript programming?

• It helps in debugging syntax errors

• It allows for efficient string manipulation

• It enhances loop performance

• It improves variable naming conventions