Node Quiz Questions

Question 1

What is Node.js?

Answer 1

Node.js is a program that allows JavaScript to be run outside of a web browser

Question 2

What can Node.js be used for?

Answer 2

It is commonly used to build back ends for Web applications, command-line programs, or any kind of automation that developers wish to perform

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 (console.log is a REPL)

Question 4

When was Node.js created?

Answer 4

In 2009 by Ryan Dahl

Question 5

What back end languages have you heard of?

Answer 5

Java, ruby, php, python, c shark, c++, coval, objective c, go

Question 6

What is a computer process?

Answer 6

the instance of a computer program that is being executed by one or many threads

Question 7

Roughly how many computer processes are running on your host operating system (Task Manager or Activity Monitor)?

Answer 7

around 400

Question 8

Why should a full stack Web developer know that computer processes exist?

Answer 8

To be aware if the request you sent actually sent. Your process might not be on, which is why the request isn’t working

Question 9

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

Answer 9

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

Question 10

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

Answer 10

It’s a global variable contained in the variable named process. So use the process variable to access it

Question 11

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

Answer 11

an array

Question 12

What is a JavaScript module?

Answer 12

a single js file

Question 13

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

Answer 13

dirname
filename
exports
module
require

Question 14

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

Answer 14

process and Class: Buffer

Question 15

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

Answer 15

to export code to be used on other js pages

Question 16

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

Answer 16

by calling the require function and passing in an argument of a filepath value

Question 17

What is a directory?

Answer 17

A folder for files

Question 18

What is a relative file path?

Answer 18

A path to a different file

Question 19

What is an absolute file path?

Answer 19

The whole file path

Question 20

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

Answer 20

fs module

Question 21

What method is available in the Node.js fs module for writing data to a file?

Answer 21

createWriteStream()
writeFile()
appendFile()

Question 22

Are file operations using the fs module synchronous or asynchronous?

Answer 22

They are both.