js prototypes

Question 1

What kind of inheritance does the JavaScript programming language use?

Answer 1

prototypal inheritance

Question 2

What is a prototype in JavaScript?

Answer 2

an object that contains properties and (predominantly) methods that can be used by other objects

each object has a private property which holds a link to another object called its prototype; that prototype object has a prototype of its own, and so on until an object is reached with null as its prototype; by definition, null has no prototype, and acts as the final link in this prototype chain

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

.

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

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