Node JS MCQs - 7

What is the purpose of the req.query 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: A) To access request query parameters

In Express.js, what does the app.locals object do?

• A) Stores application-wide data accessible in all views
• B) Stores request-specific data accessible in middleware
• C) Provides access to request query parameters
• D) Manages session data for users

Answer: A) Stores application-wide data accessible in all views

Which Express.js method is used to handle HTTP DELETE requests?

• A) app.delete()
• B) app.put()
• C) app.get()
• D) app.post()

Answer: A) app.delete()

What is the purpose of the res.status() method in Express.js?

• A) To set the HTTP status code of the response
• B) To send an HTTP response with JSON data
• C) To send an HTTP response with HTML content
• D) To redirect the client to a new URL

Answer: A) To set the HTTP status code of the response

Which of the following Express.js methods is used to mount a router on a route path?

• A) app.use()
• B) app.route()
• C) router.use()
• D) router.route()

Answer: A) app.use()

Which of the following Express.js methods is used to handle HTTP PUT requests?

• A) app.put()
• B) app.get()
• C) app.post()
• D) app.delete()

Answer: A) app.put()

What is the purpose of middleware in Express.js?

• A) To define routes for handling HTTP requests
• B) To handle database operations
• C) To manipulate request and response objects
• D) To render views with data

Answer: C) To manipulate request and response objects

What does MVC stand for in the context of web development?

• A) Model View Controller
• B) Maximum Volume Control
• C) Most Valuable Code
• D) Minimal View Complexity

Answer: A) Model View Controller

In Express.js, which method is used to handle HTTP PATCH requests?

• A) app.patch()
• B) app.put()
• C) app.post()
• D) app.delete()

Answer: A) app.patch()

What is the purpose of the req.headers 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: B) To access request headers