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node MCQ Mock Test

82 Questions • 20 Seconds / Question

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node MCQs with Answers

1. Which object is used to export modules?

A. module.exports
B. exports
C. Both A and B
D. export

Correct: C

Explanation: Both module.exports and exports can be used

2. Which status code means forbidden?

A. 401
B. 403
C. 404
D. 400

Correct: B

Explanation: 403 means forbidden

3. Which HTTP method updates data?

A. GET
B. POST
C. PUT
D. DELETE

Correct: C

Explanation: PUT updates data

4. CORS stands for?

A. Cross Origin Resource Sharing
B. Cross Object Request System
C. Common Origin Request
D. Cross Resource Security

Correct: A

Explanation: CORS allows cross-origin requests

5. Which package loads env variables?

A. env
B. dotenv
C. config
D. node-env

Correct: B

Explanation: dotenv loads env variables

6. Which solves callback hell?

A. Loops
B. Promises
C. Switch
D. If else

Correct: B

Explanation: Promises help solve callback hell

7. Which command installs dependencies?

A. node install
B. npm install
C. npm start
D. npm run

Correct: B

Explanation: npm install installs deps

8. Which company developed Node.js?

A. Microsoft
B. Google
C. Joyent
D. Facebook

Correct: C

Explanation: Node.js was developed by Joyent

9. Which is a global object in Node.js?

A. window
B. document
C. global
D. navigator

Correct: C

Explanation: global is Node.js global object

10. Which object sends response?

A. req
B. res
C. send
D. next

Correct: B

Explanation: res sends response

11. Which keyword makes function async?

A. await
B. async
C. promise
D. defer

Correct: B

Explanation: async makes function async

12. Cluster module is used for?

A. Database
B. Multi-threading
C. Load balancing
D. Caching

Correct: C

Explanation: Cluster helps load balancing

13. Which keyword is used to import modules?

A. import
B. require
C. include
D. fetch

Correct: B

Explanation: require() is used in CommonJS

14. Which file specifies Node version?

A. node.json
B. package.json
C. .nvmrc
D. version.txt

Correct: C

Explanation: .nvmrc specifies version

15. Cluster uses which concept?

A. Workers
B. Threads
C. Promises
D. Callbacks

Correct: A

Explanation: Cluster uses worker processes

16. Which improves Node.js performance?

A. Blocking code
B. Caching
C. Synchronous loops
D. Heavy CPU tasks

Correct: B

Explanation: Caching improves performance

17. Which tool bundles Node apps?

A. Webpack
B. Babel
C. ESLint
D. Nodemon

Correct: A

Explanation: Webpack bundles apps

18. Node.js is built on which engine?

A. SpiderMonkey
B. Chakra
C. V8
D. Nitro

Correct: C

Explanation: Node.js uses Google Chrome V8 engine

19. Which method writes data to a file?

A. write()
B. writeFile()
C. append()
D. save()

Correct: B

Explanation: writeFile() writes data

20. Which method spawns streams?

A. exec()
B. fork()
C. spawn()
D. run()

Correct: C

Explanation: spawn() streams output

21. Which format is commonly used in REST APIs?

A. XML
B. JSON
C. HTML
D. CSV

Correct: B

Explanation: JSON is most common

22. Which class emits events?

A. Event
B. EventEmitter
C. Emitter
D. NodeEmitter

Correct: B

Explanation: EventEmitter emits events

23. Which testing framework is popular?

A. JUnit
B. Mocha
C. TestNG
D. PyTest

Correct: B

Explanation: Mocha is popular in Node.js

24. Which module creates child processes?

A. cluster
B. worker
C. child_process
D. process

Correct: C

Explanation: child_process creates subprocesses

25. Which status code means not found?

A. 401
B. 403
C. 404
D. 500

Correct: C

Explanation: 404 means not found

26. What is middleware?

A. Database
B. Function between request and response
C. API
D. Route

Correct: B

Explanation: Middleware sits between req and res

27. Which module is used to create a server?

A. fs
B. http
C. path
D. url

Correct: B

Explanation: http module is used to create servers

28. Which package secures HTTP headers?

A. helmet
B. secure-http
C. cors
D. auth

Correct: A

Explanation: helmet secures headers

29. Which package enables CORS?

A. helmet
B. cors
C. secure
D. auth

Correct: B

Explanation: cors package enables CORS

30. Node.js uses which programming model?

A. Synchronous
B. Asynchronous
C. Multi-threaded
D. Blocking

Correct: B

Explanation: Node.js is asynchronous

31. PATCH is used for?

A. Create
B. Delete
C. Partial update
D. Full update

Correct: C

Explanation: PATCH partially updates resource

32. Which object stores environment variables?

A. env
B. process.env
C. os.env
D. global.env

Correct: B

Explanation: process.env stores env variables

33. Which tool transpiles JS?

A. Webpack
B. Babel
C. Node
D. NPM

Correct: B

Explanation: Babel transpiles JS

34. Which is best practice?

A. Hardcoding secrets
B. Using env variables
C. Blocking I/O
D. Nested callbacks

Correct: B

Explanation: Use env variables

35. Which module provides OS info?

A. system
B. info
C. os
D. env

Correct: C

Explanation: os module provides OS info

36. Which method reads file asynchronously?

A. read()
B. readFile()
C. readSync()
D. open()

Correct: B

Explanation: readFile() is async

37. Which method triggers an event?

A. trigger()
B. emit()
C. fire()
D. dispatch()

Correct: B

Explanation: emit() triggers events

38. Which module handles file system operations?

A. http
B. fs
C. path
D. os

Correct: B

Explanation: fs module handles file operations

39. Which object represents request?

A. res
B. req
C. request
D. response

Correct: B

Explanation: req represents request

40. JWT is used for?

A. Encryption
B. Authentication
C. Validation
D. Hashing

Correct: B

Explanation: JWT is used for authentication

41. Which file manages dependencies?

A. node.json
B. package.js
C. package.json
D. npm.json

Correct: C

Explanation: package.json manages dependencies

42. Which method starts server?

A. app.start()
B. app.run()
C. app.listen()
D. app.init()

Correct: C

Explanation: app.listen starts server

43. JWT contains how many parts?

A. 2
B. 3
C. 4
D. 5

Correct: B

Explanation: JWT has header, payload, signature

44. Which library enables caching?

A. redis
B. mongodb
C. mysql
D. fs

Correct: A

Explanation: Redis is used for caching

45. What does async function return?

A. Value
B. Promise
C. Callback
D. Object

Correct: B

Explanation: Async functions return Promise

46. What is Buffer used for?

A. Store strings
B. Store binary data
C. Store JSON
D. Store numbers

Correct: B

Explanation: Buffer handles binary data

47. Which method runs shell command?

A. exec()
B. run()
C. spawn()
D. fork()

Correct: A

Explanation: exec() runs shell commands

48. Node.js handles concurrency using?

A. Threads
B. Event loop
C. Workers
D. Processes

Correct: B

Explanation: Node.js uses event loop

49. Which framework is commonly used with Node.js?

A. Django
B. Laravel
C. Express
D. Spring

Correct: C

Explanation: Express is most popular

50. Which assertion library is common?

A. Chai
B. AssertJ
C. Hamcrest
D. JUnit

Correct: A

Explanation: Chai is assertion library

51. Which tool restarts server automatically?

A. npm
B. nodemon
C. pm2
D. forever

Correct: B

Explanation: nodemon restarts server

52. Which module handles events?

A. event
B. events
C. emitter
D. stream

Correct: B

Explanation: events module handles events

53. What does REPL stand for?

A. Read Eval Print Loop
B. Run Execute Print Loop
C. Read Execute Process Loop
D. Runtime Event Loop

Correct: A

Explanation: REPL means Read Eval Print Loop

54. JWT stands for?

A. Java Web Token
B. JSON Web Token
C. JavaScript Web Token
D. JSON Wrapped Token

Correct: B

Explanation: JWT = JSON Web Token

55. Which stream type is read-only?

A. Writable
B. Readable
C. Duplex
D. Transform

Correct: B

Explanation: Readable streams are read-only

56. Which tool tests APIs?

A. Postman
B. Webpack
C. Babel
D. ESLint

Correct: A

Explanation: Postman tests APIs

57. Which command starts app?

A. npm start
B. npm install
C. node init
D. node build

Correct: A

Explanation: npm start runs app

58. What is Node.js?

A. A JavaScript framework
B. A JavaScript runtime
C. A database
D. A browser

Correct: B

Explanation: Node.js is a JavaScript runtime built on Chrome V8 engine

59. Which global object handles file paths?

A. fs
B. path
C. url
D. os

Correct: B

Explanation: path module handles file paths

60. What causes callback hell?

A. Nested callbacks
B. Promises
C. Async await
D. Loops

Correct: A

Explanation: Nested callbacks cause callback hell

61. Node.js is primarily used for?

A. CPU intensive tasks
B. Building scalable network apps
C. Designing UI
D. Data analysis

Correct: B

Explanation: Node.js is best for scalable network applications

62. Which stream type can read and write?

A. Readable
B. Writable
C. Duplex
D. Pipe

Correct: C

Explanation: Duplex streams read and write

63. Which status code means unauthorized?

A. 200
B. 401
C. 403
D. 500

Correct: B

Explanation: 401 means unauthorized

64. Which method connects streams?

A. connect()
B. pipe()
C. link()
D. join()

Correct: B

Explanation: pipe() connects streams

65. Node.js follows which architecture?

A. Multi-threaded
B. Event-driven non-blocking
C. Blocking
D. MVC

Correct: B

Explanation: Node.js uses event-driven non-blocking architecture

66. Node.js supports which databases?

A. MySQL
B. MongoDB
C. PostgreSQL
D. All of these

Correct: D

Explanation: Node supports many databases

67. Which method exits a Node process?

A. process.kill()
B. process.stop()
C. process.exit()
D. process.close()

Correct: C

Explanation: process.exit() stops execution

68. Streams are used to handle?

A. Small data
B. Large data
C. JSON
D. HTML

Correct: B

Explanation: Streams handle large data efficiently

69. Which HTTP method is idempotent?

A. POST
B. PUT
C. PATCH
D. CONNECT

Correct: B

Explanation: PUT is idempotent

70. Which HTTP method deletes data?

A. POST
B. PUT
C. DELETE
D. PATCH

Correct: C

Explanation: DELETE removes data

71. Which language is used in Node.js?

A. Java
B. Python
C. JavaScript
D. PHP

Correct: C

Explanation: Node.js uses JavaScript

72. What is PM2?

A. Package manager
B. Process manager
C. Framework
D. Compiler

Correct: B

Explanation: PM2 manages Node processes

73. What does npm stand for?

A. Node Package Manager
B. Network Package Manager
C. New Package Module
D. Node Program Manager

Correct: A

Explanation: npm stands for Node Package Manager

74. Which method listens to events?

A. emit()
B. on()
C. listen()
D. call()

Correct: B

Explanation: on() listens to events

75. REST stands for?

A. Remote State Transfer
B. Representational State Transfer
C. Resource State Type
D. Request State Transfer

Correct: B

Explanation: REST = Representational State Transfer

76. Which tool checks code quality?

A. Jest
B. ESLint
C. Mocha
D. Chai

Correct: B

Explanation: ESLint checks quality

77. Which cloud supports Node.js?

A. AWS
B. Azure
C. GCP
D. All of these

Correct: D

Explanation: All major clouds support Node

78. Which global function prints output?

A. print()
B. console.log()
C. echo()
D. log()

Correct: B

Explanation: console.log prints output

79. Which improves readability?

A. Callback hell
B. Async/await
C. Deep nesting
D. Globals

Correct: B

Explanation: Async/await improves readability

80. Which middleware parses JSON body?

A. bodyParser.json()
B. express.json()
C. parse.json()
D. jsonParser()

Correct: B

Explanation: express.json parses JSON body

81. Which HTTP status code means success?

A. 404
B. 500
C. 200
D. 401

Correct: C

Explanation: 200 indicates success

82. What does res.json() do?

A. Send HTML
B. Send JSON
C. Parse JSON
D. Save JSON

Correct: B

Explanation: res.json sends JSON response

node MCQ Mock Test

Your Performance

node MCQs with Answers

1. Which object is used to export modules?

2. Which status code means forbidden?

3. Which HTTP method updates data?

4. CORS stands for?

5. Which package loads env variables?

6. Which solves callback hell?

7. Which command installs dependencies?

8. Which company developed Node.js?

9. Which is a global object in Node.js?

10. Which object sends response?

11. Which keyword makes function async?

12. Cluster module is used for?

13. Which keyword is used to import modules?

14. Which file specifies Node version?

15. Cluster uses which concept?

16. Which improves Node.js performance?

17. Which tool bundles Node apps?

18. Node.js is built on which engine?

19. Which method writes data to a file?

20. Which method spawns streams?

21. Which format is commonly used in REST APIs?

22. Which class emits events?

23. Which testing framework is popular?

24. Which module creates child processes?

25. Which status code means not found?

26. What is middleware?

27. Which module is used to create a server?

28. Which package secures HTTP headers?

29. Which package enables CORS?

30. Node.js uses which programming model?

31. PATCH is used for?

32. Which object stores environment variables?

33. Which tool transpiles JS?

34. Which is best practice?

35. Which module provides OS info?

36. Which method reads file asynchronously?

37. Which method triggers an event?

38. Which module handles file system operations?

39. Which object represents request?

40. JWT is used for?

41. Which file manages dependencies?

42. Which method starts server?

43. JWT contains how many parts?

44. Which library enables caching?

45. What does async function return?

46. What is Buffer used for?

47. Which method runs shell command?

48. Node.js handles concurrency using?

49. Which framework is commonly used with Node.js?

50. Which assertion library is common?

51. Which tool restarts server automatically?

52. Which module handles events?

53. What does REPL stand for?

54. JWT stands for?

55. Which stream type is read-only?

56. Which tool tests APIs?

57. Which command starts app?

58. What is Node.js?

59. Which global object handles file paths?

60. What causes callback hell?

61. Node.js is primarily used for?

62. Which stream type can read and write?

63. Which status code means unauthorized?

64. Which method connects streams?

65. Node.js follows which architecture?

66. Node.js supports which databases?

67. Which method exits a Node process?

68. Streams are used to handle?

69. Which HTTP method is idempotent?

70. Which HTTP method deletes data?

71. Which language is used in Node.js?

72. What is PM2?

73. What does npm stand for?

74. Which method listens to events?

75. REST stands for?

76. Which tool checks code quality?

77. Which cloud supports Node.js?