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