Node JS MCQs - 6

In Express.js, what is the purpose of the res.redirect() method?

• A) To send an HTTP response with JSON data
• B) To send an HTTP response with HTML content
• C) To redirect the client to a new URL
• D) To send a file as an attachment in the HTTP response

Answer: C) To redirect the client to a new URL

Which of the following Express.js middleware is used for parsing URL-encoded data?

• A) express.json()
• B) express.urlencoded()
• C) express.static()
• D) express.session()

Answer: B) express.urlencoded()

What is the purpose of the req.params object in Express.js?

• A) To access request query parameters
• B) To access request headers
• C) To access URL route parameters
• D) To access request body parameters

Answer: C) To access URL route parameters

Which of the following methods is used to handle errors in Express.js middleware?

• A) app.error()
• B) app.useError()
• C) app.use()
• D) app.handleError()

Answer: C) app.use()

In Express.js, what is the purpose of the res.sendStatus() method?

• A) To send an HTTP response with a status code
• B) To send an HTTP response with JSON data
• C) To send an HTTP response with HTML content
• D) To send a file as an attachment in the HTTP response

Answer: A) To send an HTTP response with a status code

What is middleware in Express.js?

• A) A function that defines routes in Express.js
• B) A function that handles HTTP requests and responses
• C) A function that runs before the route handler and has access to the request and response objects
• D) A function that sets up database connections

Answer: C) A function that runs before the route handler and has access to the request and response objects

Which of the following Express.js methods is used to define route parameters?

• A) app.param()
• B) app.route()
• C) app.get()
• D) app.use()

Answer: A) app.param()

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

• A) To end the request-response cycle
• B) To move to the next route handler
• C) To send the response to the client
• D) To start a new request-response cycle

Answer: B) To move to the next route handler

What is the purpose of the res.locals object in Express.js?

• A) To store request-specific information
• B) To access request headers
• C) To render view templates with local variables
• D) To manipulate request and response objects

Answer: C) To render view templates with local variables

Which of the following Express.js methods is used to handle errors?

• A) app.use()
• B) app.error()
• C) app.handleError()
• D) app.useError()

Answer: A) app.use()