Node JS MCQs - 5

Which of the following modules is commonly used for authentication in Node.js web applications?

• A) express-session
• B) http
• C) fs
• D) os

Answer: A) express-session

What is the purpose of the req.body 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: D) To access request body parameters

Which of the following is NOT a valid HTTP status code?

• A) 200
• B) 404
• C) 5000
• D) 302

Answer: C) 5000

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

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

Answer: B) To send an HTTP response with HTML content

In Express.js, what is the purpose of middleware functions?

• A) To handle routing logic
• B) To manipulate request and response objects
• C) To define route handlers
• D) To send static files to clients

Answer: B) To manipulate request and response objects

Which of the following middleware is commonly used for parsing JSON data in Express.js?

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

Answer: A) express.json()

In Express.js, which HTTP method is used to delete a resource?

• A) GET
• B) POST
• C) PUT
• D) DELETE

Answer: D) DELETE

What is the purpose of the app.all() function in Express.js?

• A) To specify middleware functions for all HTTP methods
• B) To define route handlers for all HTTP methods
• C) To handle all HTTP requests regardless of method
• D) To start the Express.js application

Answer: C) To handle all HTTP requests regardless of method

Which of the following is NOT true about Express.js?

• A) It is a lightweight web application framework for Node.js
• B) It provides a robust set of features for building web applications and APIs
• C) It is suitable only for front-end development
• D) It allows for easy routing, middleware configuration, and request handling

Answer: C) It is suitable only for front-end development

What is the purpose of the app.use(express.static()) function in Express.js?

• A) To serve static files such as HTML, CSS, and JavaScript
• B) To handle routing logic
• C) To authenticate users
• D) To manipulate request and response objects

Answer: A) To serve static files such as HTML, CSS, and JavaScript