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