es6

Question 1

What are the three states a Promise can be in?

Answer 1

pending, fulfilled, rejected

Question 2

How do you handle the fulfillment of a Promise?

Answer 2

using then method on promise object

Question 3

How do you handle the rejection of a Promise?

Answer 3

using catch method on promise object

Question 4

What is “syntactic sugar”?

Answer 4

syntax that is designed to make things easier to read or to express

Question 5

What is the typeof an ES6 class?

Answer 5

function

Question 6

Describe ES6 class syntax.

Answer 6

class keyword, class name, curly braces, optional constructor keyword with its parameters.

Question 7

What is “refactoring”?

Answer 7

the process of restructuring existing code.

Question 8

What is Webpack?

Answer 8

module bundler

Question 9

What is an NPM script?

Answer 9

bundle common shell commands

Question 10

How do you execute Webpack with npm run?

Answer 10

npm run

Question 11

What must the return value of myFunction be if the following expression is possible?
myFunction() ()

Answer 11

an anonymous function

Question 12

What does this code do?
const wrap = value => () => value

Answer 12

an anonymous function with parameter value being being defined, within code block another anonymous function is being returned with no parameter, and inside that code block, value of the variable value is being returned.

Question 13

In JavaScript, when is a function’s scope determined; when it is called or when it is defined?

Answer 13

when its being defined.