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Which command is used to start a MongoDB server?

  • mongod
  • mongo start
  • mongo-server
  • mongodb-server
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What does the "M" in MongoDB stand for?

  • MySQL
  • Middleware
  • MapReduce
  • MongoDB
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Which of the following is used to style React components?

  • CSS
  • SCSS
  • Styled-components
  • All of the above
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How do you create a context in React?

  • React.createContext()
  • React.useContext()
  • React.initContext()
  • React.newContext()
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Which method is used to update the state in a React component?

  • setState
  • updateState
  • changeState
  • setNewState
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Which library is used for building user interfaces in the MERN stack?

  • Angular
  • Vue.js
  • React
  • Backbone.js
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Which of the following is a backend framework?

  • React
  • Angular
  • Express
  • Vue.js
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What does the express.static middleware do?

  • Serves static files
  • Handles JSON requests
  • Manages sessions
  • Routes API requests
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Which function is used to create a schema in MongoDB?

  • createSchema
  • defineSchema
  • newSchema
  • mongoose.Schema
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How do you make an HTTP GET request in Node.js?

  • axios.get(url)
  • fetch(url)
  • http.get(url)
  • request(url)
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What is the default method used for form submission in HTML?

  • GET
  • POST
  • PUT
  • DELETE
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How do you handle asynchronous operations in Node.js?

  • Using callbacks
  • Using promises
  • Using async/await
  • All of the above
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How do you start a Node.js application?

  • node app.js
  • start app.js
  • run app.js
  • execute app.js
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Which HTTP status code indicates a successful request?

  • 200
  • 404
  • 500
  • 403
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Which lifecycle method is invoked after a component is rendered in React?

  • componentDidMount
  • componentWillMount
  • render
  • componentWillUnmount
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What is the purpose of the useReducer hook in React?

  • To manage state
  • To fetch data
  • To handle side effects
  • To create context
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Which command is used to check the version of Node.js installed?

  • node -v
  • node -version
  • node --version
  • node check-version
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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
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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
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Which command is used to create a new directory in Node.js?

  • mkdir directory-name
  • newdir directory-name
  • createdir directory-name
  • makedir directory-name
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What does the command npm init do?

  • Initializes a new Node.js project
  • Installs npm
  • Updates npm
  • Creates a new package
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Which function is used to read a file in Node.js?

  • fs.readFile()
  • fs.getFile()
  • fs.loadFile()
  • fs.fetchFile()
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What does the command npx stand for?

  • Node Package Executor
  • Node Program Executor
  • Node Process Executor
  • Node Project Executor
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Which command is used to install MongoDB on a server?

  • npm install mongodb
  • apt-get install mongodb
  • brew install mongodb
  • install mongodb
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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
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Which hook is used to perform side effects in React?

  • useEffect
  • useState
  • useRef
  • useContext
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What is Node.js primarily used for in the MERN stack?

  • Creating database schemas
  • Building server-side applications
  • Managing user sessions
  • Developing mobile apps
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What is a common HTTP method used for creating a new resource?

  • GET
  • POST
  • PUT
  • DELETE
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How do you install a specific version of a package using npm?

  • npm install package@version
  • npm get package@version
  • npm add package@version
  • npm fetch package@version
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Which method is used to fetch data in React using hooks?

  • useFetch
  • useEffect
  • useState
  • useReducer
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