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