MongoDB Quizz Dive into our tech quiz zone and put your technical skills to the test! Our quizzes cover a wide array of technical topics, perfect for sharpening your knowledge and challenging your understanding. Compete with others, see your rankings, and boost your technical proficiency. Start quizzing today! 1 / 70 1. Which command is used to initialize a new Node.js project? npm init node create npm create node init 2 / 70 2. What is Node.js? A database A front-end framework A CSS framework A JavaScript runtime 3 / 70 3. Which method is used to start a server in Node.js? server.execute() server.run() server.listen() server.start() 4 / 70 4. Which command is used to install Express.js using npm? npm get express npm install express npm add express npm setup express 5 / 70 5. What is the use of the key prop in React? To identify unique elements in a list To manage state To pass data to child components To handle events 6 / 70 6. How do you style components in React? All of the above Using CSS Using inline styles Using styled-components 7 / 70 7. Which method is used to write to a file in Node.js? fs.saveFile() fs.storeFile() fs.writeFile() fs.addFile() 8 / 70 8. What is the default port for an Express.js application? 8000 3000 5000 8080 9 / 70 9. How do you export a module in Node.js? module.export export.module exports.module module.exports 10 / 70 10. What does MERN stand for? MySQL, Express.js, React.js, Node.js MongoDB, Ember.js, React.js, Node.js MongoDB, Express.js, Redux, Node.js MongoDB, Express.js, React.js, Node.js 11 / 70 11. Which function is used to render a React component on the server side? ReactDOMServer.renderToString() React.render() React.renderToString() ReactDOMServer.render() 12 / 70 12. Which method is used to handle POST requests in Express.js? app.create() app.post() app.handle() app.use() 13 / 70 13. What is React.js? A web server A back-end framework A front-end library A database 14 / 70 14. Which module is used to create and manage a connection to MongoDB in Node.js? mongoose mongooseDB mongodb mongo 15 / 70 15. How do you parse JSON request bodies in Express.js? app.use(express.body()) app.use(express.urlencoded()) app.use(express.parser()) app.use(express.json()) 16 / 70 16. How do you create a component in React? By using the component keyword Both A and B By using the function keyword By using the class keyword 17 / 70 17. Which method is used to define a route in Express.js? app.handle() app.get() app.route() app.use() 18 / 70 18. How do you conditionally render elements in React? Using the ternary operator Using the if statement Both A and C Using the for loop 19 / 70 19. Which command is used to create a new React application? npx create react npx create-react-app npm create-app react npm create react-app 20 / 70 20. Which lifecycle method is called after a component is rendered in React? componentWillUpdate componentDidMount componentWillMount componentDidUpdate 21 / 70 21. Which hook is used to create a reference to a DOM element in React? useRef useEffect useContext useState 22 / 70 22. Which module is used to work with streams in Node.js? stream pipe buffer data 23 / 70 23. Which method is used to fetch data from an API in React.js? fetch() axios.get() $.ajax() Both A and B 24 / 70 24. Which module is used to create a server in Node.js? express net http server 25 / 70 25. What does the acronym BSON stand for in MongoDB? Binary JSON Object Notation Binary Script Object Notation Binary Stream Object Notation Binary Serialized Object Notation 26 / 70 26. Which method is used to update a document in MongoDB? db.collection.modify() db.collection.updateOne() db.collection.edit() db.collection.replaceOne() 27 / 70 27. What is middleware in Express.js? A function that has access to the request and response objects A function that handles routing A function that handles errors A function that connects to the database 28 / 70 28. What is the virtual DOM in React? The actual DOM A lightweight copy of the real DOM A way to manage state A context provider 29 / 70 29. What is the purpose of the useContext hook in React? To manage state To manage refs To access context To handle side effects 30 / 70 30. What is the purpose of the useState hook in React? To handle side effects To manage state in functional components To manage refs To create context 31 / 70 31. What is the use of the useEffect hook in React? To handle side effects To manage state To manage refs To create context 32 / 70 32. What is a replica set in MongoDB? A group of nodes that maintain the same data A set of indexes A group of databases A set of collections 33 / 70 33. Which method is used to find documents in a MongoDB collection? db.collection.query() db.collection.search() db.collection.find() db.collection.get() 34 / 70 34. Which method is used to start an Express.js server? app.listen() app.run() app.start() app.execute() 35 / 70 35. What is the purpose of the useReducer hook in React? To handle side effects To manage state using a reducer function To access context To manage refs 36 / 70 36. Which command is used to create a new database in MongoDB? CREATE DATABASE INSERT INTO db.createDatabase USE 37 / 70 37. Which method is used to insert a document into a collection in MongoDB? db.collection.add() db.collection.addDocument() db.collection.create() db.collection.insertOne() 38 / 70 38. Which method is used to serve static files in Express.js? app.serve() app.use() app.static() app.useStatic() 39 / 70 39. Which part of the MERN stack is used as the server-side runtime? MongoDB React.js Node.js Express.js 40 / 70 40. What is the purpose of the require function in Node.js? To import modules To export modules To handle errors To declare variables 41 / 70 41. Which tool is used to bundle React.js applications? Grunt Parcel Webpack Gulp 42 / 70 42. Which format does MongoDB use to store data? YAML XML JSON CSV 43 / 70 43. What is the purpose of the next function in Express.js middleware? To start the server To handle errors To end the request-response cycle To pass control to the next middleware function 44 / 70 44. Which command is used to delete a database in MongoDB? db.dropDatabase() DELETE DATABASE DROP DATABASE db.deleteDatabase() 45 / 70 45. Which part of the MERN stack is used for building user interfaces? MongoDB Node.js React.js Express.js 46 / 70 46. Which method is used to make an HTTP request in Node.js? http.createRequest() http.request() http.getRequest() http.sendRequest() 47 / 70 47. How do you create a new collection in MongoDB? db.createCollection() db.makeCollection() db.newCollection() db.addCollection() 48 / 70 48. Which method is used to read a file in Node.js? fs.readFile() fs.openFile() fs.getFile() fs.loadFile() 49 / 70 49. Which method is used to render a React component to the DOM? React.render() React.renderDOM() ReactDOM.render() ReactDOM.create() 50 / 70 50. How do you handle errors in Express.js? Both A and C Using a middleware function Using a try-catch block Using an error handler 51 / 70 51. Which type of index is created by default on the _id field in MongoDB? Single Field Index Hash Index Compound Index Text Index 52 / 70 52. What is a higher-order component (HOC) in React? A function that takes a component and returns a new component A component that accesses context A component that handles events A component that manages state 53 / 70 53. Which part of the MERN stack is responsible for handling HTTP requests? Node.js React.js MongoDB Express.js 54 / 70 54. Which method is used to update the state in a React class component? setState modifyState updateState changeState 55 / 70 55. What is JSX in React? JavaScript Extension JavaScript XHR JavaScript XML JavaScript Express 56 / 70 56. Which command is used to install Node.js packages? npm install npm setup node setup node install 57 / 70 57. What is the purpose of the res.send method in Express.js? To parse JSON data To handle requests To connect to the database To send a response to the client 58 / 70 58. What is the purpose of Mongoose in the MERN stack? To build user interfaces To manage state To handle HTTP requests To provide a schema-based solution for MongoDB 59 / 70 59. How do you pass data from a parent component to a child component in React? Using props Using context Using hooks Using state 60 / 70 60. Which hook is used to manage state in functional components in React? useContext useEffect useState useReducer 61 / 70 61. Which HTTP method is used to create a new resource? DELETE POST GET PUT 62 / 70 62. Which method is used to parse URL-encoded data in Express.js? express.json() express.parser() express.urlencoded() express.bodyParser() 63 / 70 63. How do you handle events in React? By directly attaching handlers in JSX Using the addEventListener method Both B and C By using the onEvent props 64 / 70 64. What is Express.js? A web server framework for Node.js A front-end framework A CSS framework A database 65 / 70 65. Which library is commonly used for state management in React.js applications? Lodash Redux Mongoose Axios 66 / 70 66. What is the purpose of the async keyword in Node.js? To declare a generator function To declare a function that returns a promise To handle synchronous operations To declare a callback function 67 / 70 67. What is MongoDB? A NoSQL database A relational database A web server A front-end framework 68 / 70 68. Which object is used to handle HTTP requests and responses in Node.js? http.Request http.Client http.Response http.Server 69 / 70 69. What is the purpose of the package.json file in a Node.js project? To store metadata about the project To define scripts to run tasks To list the project's dependencies All of the above 70 / 70 70. Which module is used to work with file and directory paths in Node.js? path file dir fs Your score is 0%
