LFZ Node Quiz

Question 1

What is Node.js?

Answer 1

a PROGRAM THAT RUNS JAVASCRIPT OUTSIDE OF A BROWSER

Question 2

What can Node.js be used for?

Answer 2

Pretty much everything

Question 3

What is a REPL?

Answer 3

A read–eval–print loop

Question 4

When was Node.js created?

Answer 4

2009

Question 5

What back end languages have you heard of?

Answer 5

python, c++, ruby, c, php, java, c#, javascript

Question 6

What is a computer process?

Answer 6

An instance of a computer program that is being executed

Question 7

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

Answer 7

~6

Question 8

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

Answer 8

To check resources

Question 9

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

Answer 9

The process object is 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

with process

Question 11

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

Answer 11

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

exports, require, module, __filename, __dirname

Question 14

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

Answer 14

console, TextEncoder

Question 15

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

Answer 15

To specify what functions to export

Question 16

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

Answer 16

Use the require function and assign it to a variable or use it right away

Question 17

What is the JavaScript Event Loop?

Answer 17

Checks the stack if its empty, and pushes the next task in queue to the stack

Question 18

What is different between “blocking” and “non-blocking” with respect to how code is executed?

Answer 18

blocking prevents the stack from moving. Synchronous is blocking as each process runs until completion on the stack. non-blocking goes through the event loop

Question 19

What is a directory?

Answer 19

A folder that allows us to group files together

Question 20

What is a relative file path?

Answer 20

the route to the path from the folder you are currently in/ the file is currently in

Question 21

What is an absolute file path?

Answer 21

The route to the path from the root

Question 22

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

Answer 22

fs

Question 23

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

Answer 23

fs.writeFile

Question 24

Are file operations using the fs module synchronous or asynchronous?

Answer 24

asynchronous