logo

Online Exam Quiz

questionQuestion  1 to 30

Exit Quiz

What is the main purpose of the ReactDOM library?

  • To handle HTTP requests
  • To manage server-side operations
  • To interact with the DOM
  • To define component structure
Mark for review

How do you create a new React application using create-react-app?

  • create-react-app my-app
  • create-react-app --init my-app
  • npx create-react-app my-app
  • react-app create my-app
Mark for review

Which of the following is a NoSQL database?

  • PostgreSQL
  • MySQL
  • MongoDB
  • SQLite
Mark for review

How do you create a new component in React?

  • function ComponentName() { }
  • create ComponentName() { }
  • new ComponentName() { }
  • define ComponentName() { }
Mark for review

Which method is used to update the state in a React component?

  • setState
  • updateState
  • changeState
  • setNewState
Mark for review

What does the express.static middleware do?

  • Serves static files
  • Handles JSON requests
  • Manages sessions
  • Routes API requests
Mark for review

How do you handle asynchronous operations in Node.js?

  • Using callbacks
  • Using promises
  • Using async/await
  • All of the above
Mark for review

How do you install Express.js using npm?

  • npm install express
  • npm get express
  • npm add express
  • npm build express
Mark for review

Which command is used to check the version of Node.js installed?

  • node -v
  • node -version
  • node --version
  • node check-version
Mark for review

What is the purpose of the express.Router() in Express.js?

  • To create a new route instance
  • To handle HTTP methods
  • To set up middleware
  • To manage server configurations
Mark for review

Which HTTP status code indicates a successful request?

  • 200
  • 404
  • 500
  • 403
Mark for review

Which command is used to create a new directory in Node.js?

  • mkdir directory-name
  • newdir directory-name
  • createdir directory-name
  • makedir directory-name
Mark for review

What is the purpose of the package.json file in a Node.js project?

  • To define project metadata
  • To create a new project
  • To install dependencies
  • To manage server configurations
Mark for review

How do you define a route in Express.js?

  • app.get('/route', callback)
  • app.route('/route', callback)
  • app.fetch('/route', callback)
  • app.send('/route', callback)
Mark for review

What is the purpose of the useReducer hook in React?

  • To manage state
  • To fetch data
  • To handle side effects
  • To create context
Mark for review

Which command is used to update npm to the latest version?

  • npm upgrade
  • npm update
  • npm install npm@latest
  • npm new version
Mark for review

What is Node.js primarily used for in the MERN stack?

  • Creating database schemas
  • Building server-side applications
  • Managing user sessions
  • Developing mobile apps
Mark for review

What is a common HTTP method used for creating a new resource?

  • GET
  • POST
  • PUT
  • DELETE
Mark for review

How do you create a context in React?

  • React.createContext()
  • React.useContext()
  • React.initContext()
  • React.newContext()
Mark for review

Which lifecycle method is invoked after a component is rendered in React?

  • componentDidMount
  • componentWillMount
  • render
  • componentWillUnmount
Mark for review

Which database is used in the MERN stack?

  • MySQL
  • MongoDB
  • PostgreSQL
  • SQLite
Mark for review

What does the command npx stand for?

  • Node Package Executor
  • Node Program Executor
  • Node Process Executor
  • Node Project Executor
Mark for review

What does the command npm init do?

  • Initializes a new Node.js project
  • Installs npm
  • Updates npm
  • Creates a new package
Mark for review

What is the default method used for form submission in HTML?

  • GET
  • POST
  • PUT
  • DELETE
Mark for review

How do you make an HTTP GET request in Node.js?

  • axios.get(url)
  • fetch(url)
  • http.get(url)
  • request(url)
Mark for review

Which module in Node.js provides utilities for handling file paths?

  • path
  • fs
  • http
  • url
Mark for review

What does the "M" in MongoDB stand for?

  • MySQL
  • Middleware
  • MapReduce
  • MongoDB
Mark for review

What is the default port for a Node.js application?

  • 3000
  • 8080
  • 4000
  • 5000
Mark for review

Which command is used to install MongoDB on a server?

  • npm install mongodb
  • apt-get install mongodb
  • brew install mongodb
  • install mongodb
Mark for review

Which hook is used to perform side effects in React?

  • useEffect
  • useState
  • useRef
  • useContext
Mark for review

blinkerOnline

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • Answered
  • Not Answered
  • Marked for Review

Get a 1:1 Mentorship call with our Career Advisor

Book free session