Topic 2

Question 1

What are some examples of JS frameworks?

Answer 1

Ember, Angular, and React

Question 2

______ forces developers to adopt a known and well-regarded approach to structuring and implementing a web application. Uses MVC pattern

Answer 2

Ember

Question 3

_______ has similarities with Ember, and is maintained by google

Answer 3

Angular

Question 4

_____ is a newer framework developed by Facebook. Not completely MVC though, it focuses more in view

Answer 4

React

Question 5

_______ is a development framework based in Google’s V8 JS engine

Answer 5

Node.js

Question 6

Node.js code is written in JS and then compiled by what?

Answer 6

by V8 into machine code

Question 7

What does MEAN stand for in MEAN stack?

Answer 7

MongoDB-Express_Angular_Node.js

Question 8

Node.js was developed when and by who?

Answer 8

2009 by Ryan Dahl

Question 9

Why was Node.js created?

Answer 9

It was an answer to the frustration caused by concurrency issues, especially when dealing with web services.

Question 10

Node.js is a ______ -side environment that matches the ______-side environment in the browser.

Answer 10

server, client

Question 11

What are some advantages to using Node.js?

Answer 11

Server/client share the same syntax, non-blocking frameworks, open community got libraries, and easy to set up.

Question 12

How does Node.js work?

Answer 12

Apache- Each user has their own thread, which handles requests from that user.
Each request is passed to the “kernal mode” where the thread will wait for the instruction to be handled (a blocking web server)

Question 13

What does it mean when a web server is non-blocking?

Answer 13

It is able to have multiple requests in progress at the same time by the same process (or thread)

Question 14

What is the global object?

Answer 14

A preloaded library of objects in Node.js (like a namespace)

Question 15

What are the most widely used objects in global?

Answer 15

The console object (typically used for debugging/ outputting)

Question 16

The process object, another object found in the global namespace, gives us what information about the current process?

Answer 16

• environment info
• environment variables
• communication between standard input and output
• give is the ability to kill the current process
• etc

Question 17

Give some examples of the process object

Answer 17

• process.argv -> an array of the arguments that started the process
• process.stdout.write -> console.log
• process.stdin.on -> creates listener
• process.exit

Question 18

_______ functions in the global object allow us to control the process asynchronously

Answer 18

Timing

Question 19

What does the “require” function allow us to do?

Answer 19

Import other node.js modules

Question 20

____ ________ are libraries that provide extra functionality

Answer 20

Node Modules

import them with require (module)

Question 21

The _____ module provides methods for working with files and directories.

Answer 21

path. Some examples include dirname, basename, format, join, etc

Question 22

How would you export a custom module?

Answer 22

global.module.export

Question 23

The ______ module allows us to create, emit, and listen for our own created events.

Answer 23

events

Question 24

The _____________ module provides the ability to spawn child processes.

Answer 24

child_process.

ex child_process.exec(command [ ,options][ ,callback[) for quick stuff, child_process.spawn for long stuff