What is Express.js?

• A database
• A framework for Node.js
• A CSS library
• A frontend framework

How do you install Express.js?

• npm install express
• install express
• npm add express.js
• express init

What is the primary use of Express.js?

• Frontend design
• Database queries
• Server-side routing and middleware
• Browser automation

What function is used to create an Express application?

• express.create()
• new Express()
• express()
• initExpress()

Which method handles HTTP GET requests?

• app.get()
• app.fetch()
• app.receive()
• app.query()

What is the main purpose of express.Router()?

• To create a new app
• To define middleware
• To create modular route handlers
• To connect databases

Which middleware is used to parse incoming JSON payloads?

• express.urlencoded()
• express.json()
• body-parser.text()
• multer()

How do you register a custom middleware in Express?

• app.get()
• app.route()
• app.use()
• app.listen()

What is the default behavior of Express when an error is thrown?

• Sends a 500 response
• Ignores the error
• Crashes the app
• Sends a 200 response

Which of the following is a templating engine supported by Express?

• Jade (Pug)
• Handlebars
• EJS
• All of the above

Which middleware is commonly used for security hardening in Express.js?

• cors
• helmet
• logger
• jsonwebtoken

What is Passport.js mainly used for?

• Logging
• Routing
• Authentication
• Caching

What does RBAC stand for?

• Role-Based Application Controller
• Reliable Backend Auth Code
• Role-Based Access Control
• Reactive Backend Access Control

Which library is used for file upload in Express.js?

• Formidable
• Multer
• Cors
• Bcrypt

What does res.locals store?

• Request-scoped data
• Environment variables
• Session data
• Route params