Node.JS

Question 1

What is Node.js?

Answer 1

A JavaScript runtime

Question 2

What can Node.js be used for?

Answer 2

is used to execute JavaScript outside of the browser

Question 3

What is a REPL?

Answer 3

Read Eval Print Loop. a simple interactive computer programming environment that takes single user inputs, executes them, and returns the result to the user

Question 4

What is a computer process?

Answer 4

A program that is running on your computer

Question 5

What is the process object in a Node.js program?

Answer 5

that provides information about, and control over, the current Node.js process.

Question 6

How do you access the process object in a Node.js program?

Answer 6

by name, its always there.

Question 7

What is the data type of process.argv in Node.js?

Answer 7

an array of strings.

Question 8

What is a JavaScript module?

Answer 8

a single file that should preform a specific task

Question 9

What values are passed into a Node.js module’s local scope?

Answer 9

exports, require, module, __filename, __dirname

Question 10

Give two examples of truly global variables in a Node.js program.

Answer 10

process object and console.

Question 11

What is the purpose of module.exports in a Node.js module?

Answer 11

to be able to send data to other modules

Question 12

How do you import functionality into a Node.js module from another Node.js module?

Answer 12

using the require method. ex require(‘./add’)

Question 13

What module does Node.js include for manipulating the file system?

Answer 13

the fs module

Question 14

What does express.static() return?

Answer 14

a middleware function that probably has all the contents of a specified file

Question 15

What is the local __dirname variable in a Node.js module?

Answer 15

it provides the absolute path to the current directory

Question 16

What does the join() method of Node’s path module do?

Answer 16

it joins multiple file paths or names into one simplified string.