Node JS MCQs - 2

What is the purpose of the Buffer class in Node.js?

• A) To manipulate binary data
• B) To manage HTTP requests
• C) To handle file system operations
• D) To create web servers

Answer: A) To manipulate binary data

Which of the following Node.js modules is commonly used for database operations?

• A) fs
• B) http
• C) os
• D) mongoose

Answer: D) mongoose

What is the purpose of the process object in Node.js?

• A) To manage child processes
• B) To provide information about the current Node.js process
• C) To handle HTTP requests
• D) To interact with the file system

Answer: B) To provide information about the current Node.js process

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

• A) It is single-threaded
• B) It is asynchronous
• C) It uses the Chrome V8 JavaScript engine
• D) It is only used for front-end development

Answer: D) It is only used for front-end development

What is the purpose of the setTimeout() function in Node.js?

• A) To pause the execution of the current thread for a specified amount of time
• B) To schedule a callback function to be executed after a specified delay
• C) To terminate the Node.js process
• D) To set a timeout for HTTP requests

Answer: B) To schedule a callback function to be executed after a specified delay

What is the purpose of the require() function in Node.js?

• A) To include external modules
• B) To define variables
• C) To create a new file
• D) To send HTTP requests

Answer: A) To include external modules

Which of the following is NOT a valid HTTP method in Node.js?

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

Answer: D) UPDATE

What is the purpose of the exports object in Node.js?

• A) To import modules
• B) To create an HTTP server
• C) To export variables, functions, or classes from a module
• D) To handle database operations

Answer: C) To export variables, functions, or classes from a module

Which of the following is NOT true about callbacks in Node.js?

• A) Callbacks are asynchronous
• B) Callbacks are used to handle asynchronous operations
• C) Callbacks are always executed immediately
• D) Callbacks are functions passed as arguments to other functions

Answer: C) Callbacks are always executed immediately

What is the purpose of the path module in Node.js?

• A) To handle HTTP requests
• B) To interact with the file system
• C) To manage child processes
• D) To create a web server

Answer: B) To interact with the file system