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