The Modern JavaScript Bootcamp (2019) - Primitives and Objects: Part II

The video tutorial explains prototypal inheritance in JavaScript, focusing on how arrays and functions are objects with shared methods through prototypes. It also covers primitive values like strings, numbers, and booleans, which have object wrappers allowing them to access methods. The tutorial emphasizes understanding the prototype chain and the conversion process behind the scenes, without altering coding practices.

What is a primitive value in JavaScript?

• A function with a prototype

• An object with methods

• A non-object value without properties

• A value that has properties

Which of the following is NOT a primitive value in JavaScript?

• String

• Boolean

• Array

• Number

How do arrays in JavaScript access shared methods like 'filter'?

• Using a special syntax

• By being a subclass of Object

• Via the array's prototype chain

• Through their own properties

What is the prototype chain for an array in JavaScript?

• Object -> Array -> null

• Function -> Array -> Object

• Array -> Object -> null

• Array -> Function -> Object

What does the prototype chain for a function in JavaScript look like?

• Function -> Object -> null

• Function -> Array -> Object

• Object -> Function -> null

• Array -> Function -> Object

How are strings able to use methods like 'split' if they are primitives?

• They are a subclass of Object

• They are not actually primitives

• JavaScript converts them to objects temporarily

• They have built-in methods

Which of the following is true about numbers and booleans in JavaScript?

• They have object wrappers for method access

• They cannot use any methods

• They are objects by default

• They are always converted to strings

What is the main difference between null and undefined compared to other primitives?

• They are truly primitive with no object counterparts

• They are always converted to objects

• They can have properties

• They have object wrappers

What is a common misconception about JavaScript objects?

• Primitives are always objects

• Functions cannot be objects

• Only arrays are objects

• Everything in JavaScript is an object

Why is it important to understand the prototype chain in JavaScript?

• To understand method access and inheritance

• To modify built-in objects

• To create new primitive types

• To avoid using objects