NodeJS MCQ

NodeJS is an open-source client-server environment, which is free and runs on cross platforms(multiple platforms like Windows, Unix, Mac OS, etc). NodeJS uses JavaScript on the server side. 

NodeJS is preferred because it uses asynchronous programming. It eliminates the wait time for processing a task and directly continues with the next request made by the server. It runs single-threaded, non-blocking, asynchronous programming, which is very memory efficient.

Functionalities of NodeJS:

  1. Generates dynamic page content.
  2. On the server-side, it can create, open, read, write, delete, and close files.
  3. It can collect form data.
  4. It can add, delete and modify data in the database.

NodeJS tasks are done in NodeJS files. These files contain tasks that will be executed on certain events. These files must be instantiated on the server before having any effect, and have the file extension ‘.js’.

NodeJS MCQs
1. 

Which of the following is a valid HTTP method?

get

put

post

All of the above
2. 

Which node module is used for zip and unzip functionalities?

ZLIB

buffer

binary

None of the above
3. 

Which node module is used to handle binary data?

binary

buffer

crypto

dgram
4. 

Which node module is used to serve static resources in NodeJS?

static

node-static

http

None of the above
5. 

Which NodeJS object specifies the name of the directory which contains the code?

__dirname

Buffer

__filename

None of the above
6. 

Which NodeJS statement is used to list all the locally installed NodeJS modules?

Is

list

cwd

None of the above
7. 

Which of the following are built-in node modules?

zlib

https

dgram

All of the above
8. 

Which of the following are examples of node modules?

Express

Body-parser

Socket.io

All of the above
9. 

Which of the following are examples of NodeJS streams types?

Writable

Duplex

Readable

All of the above
10. 

Which of the following are NodeJS global objects?

__dirname

__filename

Buffer

All of the above
11. 

Which of the following are StringDecoder class methods?

decoder.write()

decoder.end()

Both A and B

None of the above
12. 

Which of the following are the benefits of using modules?

Provides a means of dividing up tasks.

Provides a means of resuing program codes

Provides a means of testing individual parts of a program.

All of the above
13. 

Which of the following fs module is used to close a file?

fs.close()

fs.closeFile()

fs.closePath()

None of the above
14. 

When does a stream fire a data event?

When there is data to read.

When there is data to write

When there is no data available

None of the above
15. 

Which of the following is used for cryptographic protocols to secure communication over the web?

TLS/SSL

TCP/IP

Both A and B

None of the above
16. 

Which of the following NodeJS module splits up a web address into readable parts?

Express

Cors

URL

None of the above
17. 

Which of the following NodeJS modules is now deprecated?

punycode

os

express

None of the above
18. 

Which of the following NodeJS modules is used for file uploads?

formidable

fs

express

files
19. 

Which of the following operations can we do with the NodeJS events module?

Create

Listen for

Fire

All of the above
20. 

Which of the following parameters is taken by the buffer.toString method?

encoding

start

end

All of the above
21. 

Which of the following statements are true?

Node.js is a server-side language.

Node.js is a client-side language.

Node.js is both a server and client-side language.

None of the above.
22. 

Which of the following statements are true?

  1. NodeJS is multithreaded.
  2. The Buffer class is a global class that can be accessed without importing a buffer module.

Both statements are true.

Both statements are false.

Statement 1 is true and statement 2 is false.

Statement 2 is true and statement 1 is false.
23. 

_ variable in REPL session of NodeJS is used for?

It is used to store the result

It is used to get the last command that was used

It is used to get the last result

None of the above
24. 

____ is a debugging tool for NodeJS?

REPL

Node Inspector

Node Console

None of the above
25. 

_____ is a software service that allows 2 or more applications to talk to each other?

REST

API

Both A and B

None of the above
26. 

_____ is an interactive shell that processes Node.

REPL

REAL

RESP

None of the above
27. 

The advantages of using node modules are?

Provides a means of dividing up tasks

Provides a means of reuse of program code

Provides a means of testing individual parts of the program

All of the above
28. 

Applications built on NodeJS can access which of the following types of databases?

NoSQL Databases

SQL Databases

Both A and B

None of the above
29. 

Default scope in Node.js application is?

Global

Local

Local to Object

None of the above
30. 

For path specific operations which of the following operations is required to be used?

OS Module

Path Module

Fs Module

None of the above
31. 

How can we check the installed version of Node?

npm –version

node –version

npm getVersion

None of the above
32. 

How can we expose node modules?

exports

expose

requires

None of the above
33. 

How can we initiate a NodeJS file called Hello in Node?

Hello,js

node Hello.js

javascript Hello.js

node Hello
34. 

How can we install the node body-parser module?

npm install body-parser

node install body-parser

node.js install body-parser

None of the above
35. 

How many node objects methods are available?

21

18

19

20
36. 

JSON was natively constructed on which language?

Javascript

Java

C++

None of the above
37. 

Node.js is written in which language?

C++

JavaScript

C

Java
38. 

NodeJS is supported on which of the following platforms?

Windows

MAC OS

Unix/Linux

All of the above
39. 

NodeJS uses an event-driven, non-blocking IO model?

True

False

Cannot be determined

None of the above
40. 

A visual development environment for NodeJS is?

Visual Studio

IntelliJ

NetBeans

Node-Red
41. 

The command to install nodemon in NodeJS is?

npm install -g nodemon

node install -g nodemon

npm nodemon

node nodemon
42. 

The node object property which is used to return the node just before the current node is?

localName

index

previousSibling

None of the above
43. 

To include the HTTP server in the node module, what function do we use?

get()

require()

createServer()

None of the above
44. 

We can kill a process in Node.js using the keyboard shortcut?

Ctrl + C

Ctrl + B

Ctrl + K

None of the above
45. 

What command do we use to list all the node modules that are installed globally?

npm ls -g

node ls -g

npm ls

node ls
46. 

What does the fs module stand for?

File Store

File Service

File System

None of the above
47. 

What function is used to fire an event?

emit()

fire()

calc()

None of the above
48. 

What is a callback?

The callback is a technique in which a method calls back the caller method

The callback is an asynchronous equivalent for a function

Both A and B

None of the above
49. 

What is the full form of npm?

Node Project Manager

Node Package Manager

New Project Manager

New Package Manager
50. 

What is the full form of REPL?

Read Eval Print Loop

Research Eval Program Learn

Read Earn Point Learn

Read Eval Point Loop
51. 

What method is used to return the current working directory of the process?

cwd()

pwd()

cmd()

None of the above