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