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How do you include middleware only for certain routes in Express.js?

By specifying middleware in the route handler function
By using the app.use() method before defining the routes
By using the app.route() method
By using the app.use() method with a path parameter

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How do you serve static files from a directory named "public"?

app.serve('public')
app.static('public')
app.use('public')
app.use(express.static('public'))

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What is the purpose of the app.route() method in Express.js?

To define route handlers for different HTTP methods on a single route path
To define middleware functions
To serve static files
To render views

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How can you pass parameters in an Express.js route?

Using the query string
Using the request body
Using route parameters
All of the above

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What is Express.js?

A front-end JavaScript framework
A back-end JavaScript framework
A database management system
A testing framework

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What is next() used for in middleware functions?

To terminate the request-response cycle
To render a view
To send a response
To pass control to the next middleware

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How do you install Express.js in a Node.js project?

Using npm install express
Using npm install express-generator
Using npm install -g express
Using npm install express --save

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How do you reload an Express.js server without restarting it manually?

Using nodemon
Using reloader
Using express-reload
Using auto-restart

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How do you set a view engine in Express.js?

app.set('view engine', 'pug')
app.render('view engine', 'pug')
app.engine('view', 'pug')
app.use('view engine', 'pug')

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How do you create a modular route in Express.js?

Using express.RouteHandler()
Using express.Router()
Using express.Module()
Using express.Route()

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How do you access query string parameters in Express.js?

req.params
req.query
req.route
req.body

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How do you define a dynamic route in Express.js?

By using regular expressions
By appending a colon : before the parameter name in the route definition
By specifying the route parameter in the request body
By using the req.params object

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What is the purpose of the express.urlencoded() middleware?

To parse JSON data in request bodies
To parse URL-encoded data in request bodies
To handle authentication
To render views

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Which middleware is commonly used for parsing incoming request bodies?

express.static()
express.json()
express.urlencoded()
express.cookieParser

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How do you start a server in Express.js?

app.listen()
app.run()
app.start()
app.begin()

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How do you monitor performance in an Express.js application?

Using express-status-monitor middleware
Using perf-monitor middleware
Using express-perf middleware
Using app-monitor middleware

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Which module is used to create an Express.js application?

http
express
fs
path

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How do you handle JSON Web Tokens (JWT) in Express.js?

Using jsonwebtoken middleware
Using express-jwt middleware
Using express-token middleware
Using jwt-express middleware

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How do you handle HTTPS in Express.js?

Using express.secure()
Using express.https()
Using https.createServer()
Using app.https()

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How do you access route parameters in Express.js?

req.route
req.body
req.query
req.params

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What does res.redirect() do in Express.js?

Sends a response with the specified status code
Sends a response with the specified content
Redirects the request to another URL
Terminates the request without sending any response

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Which HTTP method is used to update a resource in RESTful API design?

GET
POST
PUT
DELETE

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How do you set up a static file server in Express.js?

Using the app.static() method
Using the express.static() middleware
By configuring the server settings
There's no built-in way to serve static files in Express.js

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How do you create a sub-application in Express.js?

Using express.SubApp()
Using express.Application()
Using express.Router()
Using express.SubRouter()

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Which middleware is used to parse URL-encoded bodies?

express.json()
express.parse()
express.body()
express.urlencoded()

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How do you handle multipart/form-data in Express.js?

Using form-data middleware
Using multer middleware
Using body-parser middleware
Using express-body middleware

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How do you handle 404 errors in Express.js?

app.error(404)
app.missing(404)
app.route(404)
app.use((req, res) => { res.status(404).send('Not Found'); })

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How can you access query parameters in Express.js?

Using the req.query object
Using the req.query object
Using the req.body object
Using the req.headers object

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What is the purpose of the next() function in Express.js middleware?

To send the response
To invoke the next middleware function
To terminate the request
To render the view

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Which template engine is commonly used with Express.js?

Pug
Handlebars
EJS
All of the above

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