JavaScript Mastery from Zero to Hero - Prepare for Coding Interviews - Final Exercise - Facebook Unfriend Functionality

The video tutorial covers working with objects and arrays in JavaScript through a Facebook functionality exercise. The task is to create a function that removes a friend from a user's friend list, mimicking the unfriend feature on Facebook. The tutorial explains the structure of a Facebook user object and guides viewers through writing the unfriend function, which takes an object and a friend's name as arguments. Error handling is also discussed for cases where the friend does not exist. The exercise reinforces understanding of objects and arrays in JavaScript.

What is the main focus of the Facebook functionality exercise discussed in the video?

• Adding new friends

• Deleting friends

• Joining new groups

• Updating profile pictures

Which attribute of the Facebook user object is crucial for the unfriend functionality?

• Age

• Friends list

• Profile picture

• Date joined

What is the primary task of the 'unfriend' function?

• Add a new friend

• Remove a friend from the list

• Update the user's age

• Change the profile picture

What should the 'unfriend' function return if the specified friend does not exist?

• A null value

• An error message

• A success message

• The original friends list

What does the 'unfriend' function ultimately return after execution?

• The updated friends list

• The user's age

• The user's profile picture

• The user's groups