Super 15 batch 3 quiz 3

1. What is Express.js?

• - a) A front-end JavaScript library

• - b) A Node.js web application framework

• - c) A database management tool

• - d) A version control system

2. Which of the following is the correct way to install Express.js?

• - a) npm install -g express

• - b) npm install express --save

• - c) npm install expressjs

• - d) npm install express-js

3. Which of the following is used to create a new instance of an Express application?

• - a) var app = express();

• - b) var app = new Express();

• - c) var app = createExpress();

• - d) var app = Express.init();

4. Which method is used to start a server in Express.js?

• - a) app.listen()

• - b) app.start()

• - c) app.create()

• - d) app.run()

5. Which HTTP method is used to retrieve data from the server in Express.js?

• - a) POST

• - b) DELETE

• - c) PUT

• - d) GET

6. How can you define a route in Express.js to handle a GET request?*

• - a) app.route('GET', '/');

• - b) app.get('/');

• - c) app.get('/', function(req, res) {...});

• - d) app.on('GET', '/');

7. Which of the following middleware functions is used to parse incoming request bodies in Express.js?

• - a) bodyParser.json()

• - b) appParser()

• - c) reqParser()

• - d) expressParser()

8. Which of the following is true about middleware in Express.js?

• - a) It handles file uploads only.

• - b) It handles HTTP routing only.

• - c) It is a function that handles requests and responses in the app.

• - d) It must be the last route defined in the app.

9. Which method is used to send a response back to the client in Express.js?

• - a) res.return()

• - b) res.send()

• - c) res.back()

• - d) res.response()

10. How do you serve static files in Express.js (like images, CSS, or JavaScript files)?

• - a) app.static('/path/to/files')

• - b) app.use(express.static('public'))

• - c) app.serve('public')

• - d) app.files('/path/to/files')