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