javascript-custom-methods

Question 1

What is a method?

Answer 1

JavaScript methods are actions that can be performed on objects. A JavaScript method is a property containing a function definition.

Question 2

How can you tell the difference between a method definition and a method call?

Answer 2

A function can pass the data that is operated and may return the data.
The method operates the data contained in a Class.

Question 3

Describe method definition syntax (structure).

Answer 3

const obj = {
  foo() {
    return 'bar';
  }
};

Question 4

Describe method call syntax (structure).

Answer 4

object.function()

Question 5

How is a method different from any other function?

Answer 5

A function is directly called by its name, whereas a method includes a code that is called by the object’s name.

Question 6

What is the defining characteristic of Object-Oriented Programming?

Answer 6

objects can contain both data (as properties) and behavior (as methods).

Question 7

What are the four “principles” of Object-Oriented Programming?

Answer 7

Abstraction
Encapsulation
Inheritance
Polymorphism

Question 8

What is “abstraction”?

Answer 8

The process of removing physical, spatial, or temporal details[2] or attributes in the study of objects or systems to focus attention on details of greater importance;[3] it is similar in nature to the process of generalization;

Question 9

What does API stand for?

Answer 9

Application programming interface

Question 10

What is the purpose of an API?

Answer 10

An API (Application Programming Interface) is a set of functions that allows applications to access data and interact with external software components, operating systems, or microservices. To simplify, an API delivers a user response to a system and sends the system’s response back to a user.