javascript-prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

prototypal/prototype-based inheritance

Question 2

What is a prototype in JavaScript?

Answer 2

A parent object through which child objects inherit methods and properties. OR an object that contains properties and (predominantly) methods that can be used by other objects.

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

Inheritance from prototypes

Question 4

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

Answer 4

Its prototype.