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