Developing Cloud Apps with Node.js and React Quiz Answers

Developing Cloud Apps with Node.js and React Week 01 Quiz Answers

Quiz : Graded Quiz

Q1. What quality makes it possible for you to run JavaScript applications without compiling?

You can use a text editor to develop JavaScript applications.
All modern browsers support JavaScript.
JavaScript is an interpreted language.
The language syntax resembles Java.

Q2. True or false: With client-side JavaScript, Node.js applications process and route web service requests from the client.

True
False

Q3. Which of the following applications intercepts the call when JavaScript sends a web service request to the Node.js server?

JSON
REST Web Service
Enterprise Java
CSS

Q4. What is the best description of Node.js?

A multithreaded application environment that handles operations through events
A package for a script file that corresponds to a module
A server-side programming framework that uses JavaScript as its programming language
A simple web server that listens to HTTP requests and returns HTTP response messages

Q5. How do you handle operation results with Node.js?

Use blocking on asynchronous I/O operations
Write callback functions to handle results when the operations complete
Specify a relative path to the Node.js script from the module directory
Create an instance of a web server application

Q6. What do you use the http.createServer function for?

To create an instance of a web server
To import a Node.js module
To specify a main script for your module
To develop an anonymous function to handle requests and responses

Q7. What is the correspondence between a Node.js module and a script file?

None
4:1
1:1
2:1

Q8. What do you use the require function for?

To specify a main script for your module
To develop an anonymous function to handle requests and responses
To create an instance of a web server
To import a Node.js module

Q9. What does adding a property to the implicit exports object do?

A function returns details about your module.
An anonymous function is blocked on the Node.js server.
A function becomes available to Node.js applications that import your module.
A function returns an object that represents an instance of your module.

Q10. What happens when a module does not have a package.json file?

The require statement assumes that scripts have a file extension of js.
Node.js assumes that the main class is named index.js.
The relative path to the Node.js script changes to an absolute path from the module directory.
There is no module manifest.

Developing Cloud Apps with Node.js and React Week 02 Quiz Answers

Quiz : Graded Quiz

Q1. What best describes the network operations that Node.js makes?

Non-blocked operations return immediately without added processing time on the server
Non-blocked operations return in a synchronized manner with added processing time on the server
Applications block every network operation to complete at the same time on the server
Blocked operations return immediately without added processing time on the server

Q2. Before the Node.js framework receives the HTTP response message from the remote web server, it immediately returns a result for the http.request function call. What does this result state?

The return message will be sent successfully.
A request is in progress.
The callback function was called successfully.
The response message will be sent successfully.

Q3. What might you need to use when sending a request call from a function inside a Node.js module?

HTTPS
Markdown
HTML
CSS

Q4. What parameter is optional in an http.request?

Resource variable parameter
Location function parameter
Event variable parameter
Callback function parameter

Q5. What object do Node.js modules in the SDK pass as the first parameter in a callback function?

Error
Identity
Destination
Location

Q6. What do you pass back in the callback handler to indicate a successful return?

Error
Null object
404 status code
Empty string

Q7. Which function calls the resultCallback callback function to return results to the main application?

http.request()
aggregate_context()
step()
result()

Q8. JSON is the standard format for API data exchange. What relationship does JSON have with Node.js?

Standard representation of native JavaScript objects
Common data model folder
Metadata file
JSON_SET

Q9. When an error occurs, which state is the promise at?

Rejected
Pending
Aborted
Resolved

Q10. The axios package handles HTTP requests in Node.js and returns a promise object. The promise object has a method that is called after the promise completes. What method does the promise object use?

else
then
or
if

Developing Cloud Apps with Node.js and React Week 03 Quiz Answers

Quiz : Graded Quiz

Q1. The Node.js framework doesn’t provide many features for building web apps. What do developers rely on to extend Node.js features?

External libraries and packages
JavaScript
Timely updates
JSON

Q2. Node.js doesn’t provide a parsing function for which language?

XML
JavaScript
HTML
JSON

Q3. One disadvantage of manual parsing is that string matching ignores the XML data structure. However, depending on XML data complexity, string matching might be more efficient than what?

An XML attribute structure
An XML tree of the data
No alternative: string matching is never more efficient.
An XML root element

Q4. Which Node.js package can parse a string of XML elements into a JavaScript object?

XML-JS
Async.js
xml2js
Expressjs

Q5. Which web application framework is based on the Node.js runtime environment?

XML-JS
Express
Async.js
JSON

Q6. The Node.js framework treats HTTP requests at a lower network level. In contrast, Express implements an app class for what purpose?

Access a URL
Parse through a network path
Map to a web resource path
Look up web services

Q7. Which function relies on custom callback functions to parse across web resource path?

ReadableStream
createServer()
http.createServer
http.IncomingMessage

Q8. After creating the new route handler to handle web application requests, what occurs next?

Listen to incoming HTTP GET requests
Pass the parameter location
Access a variable in the path
Store values in a location variable

Q9. What do you call to create a web server object to listen for incoming requests on a port?

app.listen
http.name
http.view
app.request

Q10. After you’ve imported a copy of the Express web application framework, what must you do next?

Configure a route handler
Write code
Reconfigure Node.js
Create an instance of the app JavaScript object

Developing Cloud Apps with Node.js and React Week 04 Quiz Answers

Quiz : Graded Quiz

Q1. What is EcmaScript or ES?

Communication standard
JavaScript Standard
Programming organization
Regulated name for JSON

Q2. What is one of the new features in JavaScript ES6?

Object
Get
Arrow functions
Find

Q3. What is the state of a promise object when the operation executes successfully?

end
constant
pending
fulfilled

Q4. React is an open source library created and maintained by Facebook and community developers. What is it mainly used to build?

Frontend Applications
AI questions
Accessibility messages
Error messages

Q5. Facebook provides the Create React App to simplify creating React apps. What must be installed in order to run npx create-react-app with the name of the app you want to create?

XML editor
JavaScript
Facebook
Node.js

Q6. Functional components are most useful when the component has properties, but what is the restriction?

Properties can’t have uppercase characters.
Properties can’t be user-defined.
The component lifecycle does not require management.
Properties can’t be passed as parameters to the function.

Q7. What makes class components more preferable than functional components?

Versatility
Definition
Simplicity
Rigidity

Q8. In the Working with React Components video, what does the incrementCounter method do in the React app?

Stops the application
Passes value to the GUI
Updates state so component is rendered again
Routes command through component

Q9. As components are mounted there are four methods called, all in the same order. Which method only returns one root element, even if it has or doesn’t have many nested child elements