Node JS 13 Set 4

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Free Online Best Node JS 13 MCQ Questions for improve your basic knowledge of Node JS 13. This Node JS 13 set 4 test that contains 25 Multiple Choice Questions with 4 options. You have to select the right answer to a question.

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Question 1

Node.js = ____

A	Runtime Environment + JavaScript Library
B	Runtime Environment
C	JavaScript Library
D	All of the Above

Question 2

In Nodejs what is use of underscore variable in REPL session?

A	to store the result
B	to get the last command used
C	to get the last result
D	None of the above

Question 3

What should you do in your code to improve your application’s performance?

A	Use gzip compression
B	Do logging correctly
C	Handle exceptions properly
D	Don’t use synchronous functions

Question 4

To install Node.js express module____

A	$ npm install express
B	$ node install express
C	$ install express
D	$ install npm express

Question 5

A Node.js application consists of_____ important components ?

A	2
B	3
C	4
D	5

Question 6

Which of the following tool automates various tasks of Node.js application?

A	Express.js
B	GruntJS
C	NPM
D	None of the above

Question 7

Which of the following is true about fs module of Node?

A	Every method in fs module have synchronous as well as asynchronous form
B	Asynchronous methods of fs module take last parameter as completion function callback and first parameter of the callback function as error
C	Both of the above
D	None of Above

Question 8

Which of the following class is used to create and consume custom events in Node.js?

A	Events
B	NodeEvent
C	EventEmitter
D	Node

Question 9

Node.js supports which of the following platform?

A	Windows
B	Macintosh
C	Unix/Linux
D	All of the Above

Question 10

Stable Workers Threads API____

A	Worker threads in Node.js enable parallel, CPU-intensive JavaScript operations
B	ECMAScript modules,QUIC protocol support
C	WebAssembly support,V8 JavaScript engine performance updates
D	All of the Above

Question 11

Which of the following statements holds good with respect to Node?

A	Node being a single thread, and uses async function calls to maintain the concurrency
B	Every API of Node js are asynchronous
C	Node thread keeps an event loop and whenever any task get completed, it fires the corresponding event which signals the event listener function to get executed
D	All of the Above

Question 12

Which method is used to compare the placement of two nodes in the DOM hierarchy (document)?

A	compareDocumentPosition()
B	cloneNode()
C	getUserData()
D	getFeature()

Question 13

Which statement executes the code of sample.js file?

A	sample.js
B	node sample.js
C	nodejs sample.js
D	node js sample.js

Question 14

New in Node.js is 13____

A	ECMAScript modules,QUIC protocol support
B	WebAssembly support,V8 JavaScript engine performance updates
C	Diagnostic reports
D	All of the Above

Question 15

Which of the following module is required for path specific operations ?

A	Os module
B	Path module
C	Fs module
D	js module

Question 16

listeners(event)____

A	Adds a one time listener to the event
B	Returns the number of listeners for a given event
C	Removes a listener from the listener array for the specified event
D	Returns an array of listeners for the specified event

Question 17

HTTP methods______

A	GET
B	PUT
C	POST
D	All of the Above

Question 18

How can we create instance of http module?

A	var http = require("http")
B	var http = new require("http")
C	var http = new http()
D	http = new http()

Question 19

Which method is used to compare the placement of two nodes in the DOM hierarchy (document)?

A	cloneNode()
B	compareDocumentPosition()
C	getUserData()
D	getFeature()

Question 20

listenerCount(emitter, event)____

A	Returns the number of listeners for a given event
B	Returns an array of listeners for the specified event
C	Adds a one time listener to the event
D	Removes a listener from the listener array for the specified event

Question 21

Better Python 3 build support______

A	in 2020 it should be possible to build Node.js and native modules using Python 3
B	Worker threads in Node.js enable parallel, CPU-intensive JavaScript operations
C	WebAssembly support,V8 JavaScript engine performance updates
D	WebAssembly support,V8 JavaScript engine performance updates

Question 22

Command to show installed version of Node___

A	$ npm --version
B	$ node --version
C	$ npm getVersion
D	$ node getVersion

Question 23

Which of the following is the correct way to get a normalized path?

A	path.normalize('/test/test1//2slashes/1slash/tab/..')
B	fs.normalize('/test/test1//2slashes/1slash/tab/..')
C	os.normalize('/test/test1//2slashes/1slash/tab/..')
D	None of Above

Question 24

Which of the following types of application can be built using Node.js?

A	Web Application
B	Chat Application
C	RESTful Service
D	All of the above

Question 25

Select all valid rout parameter formats_____

A	/books/!:from-:to
B	/books/:from-:to
C	/books/:bookId/Id/
D	/books/:book/Id/

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