JavaScript-prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

Prototype-based inheritance

Question 2

What is a prototype in JavaScript

Answer 2

Prototypes are the mechanisms by which JavaScript objects inherit features from one another.

Question 3

How is it possible to call methods on strings, arrays, and numbers even though those methods don’t actually exist on objects, arrays, and numbers?

Answer 3

Use Object.setPrototypeOf( )

Question 4

If an object does not have it’s own property or method by a given key, where does JavaScript look for it?

Answer 4

Its prototype