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

an object in which has many methods

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

because of the prototype object and the objects, arrays, and numbers simply borrow the methods from the prototype object; they delegate to the prototype object

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

the prototype object; prototype chain