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NodeJS Basics

1/25 Which of the following is a core module in Node.js?
- Express
- fs
- Bootstrap
2/25 Which of the following is an EventEmitter function used to register a listener for a named event?
- event.on()
- event.listen()
- event.register()
3/25 What is the purpose of the Buffer class in Node.js?
- To handle binary data
- To buffer all the application data in memory
- To manage application caching
4/25 Which of the following best describes the Node.js global object?
- An object that provides functions and variables that can be used anywhere in the application
- A global variable that stores user session data
- A module that needs to be imported before use
5/25 What is the default scope of Node.js modules?
- Global
- Local to the file they are defined in
- Local to the directory they are located in
6/25 What does NPM stand for?
- Node Package Manager
- Network Protocol Module
- New Programming Methodology
7/25 Which of the following is NOT a valid stream in Node.js?
- ReadStream
- WriteStream
- QuickStream
8/25 How do you set an environment variable in Node.js?
- process.env.VAR_NAME = 'value';
- set VAR_NAME='value';
- env.set('VAR_NAME', 'value');
9/25 Which of the following allows Node.js to provide a non-blocking I/O model?
- Single-threaded model
- Use of the libuv library
- Multi-threaded model
- Synchronous execution
10/25 In Node.js, how can you monitor the execution time of an asynchronous operation?
- Using the console.time() and console.timeEnd() methods
- Using the process.time() method
- Using a custom timing module
- It's not possible to accurately measure asynchronous operations
11/25 What is the primary use case for the Node.js crypto module?
- Performing cryptographic operations like hashing and encryption
- Generating random numbers
- Creating secure network connections
- Managing cryptocurrency transactions
12/25 What is the command to list all the global packages installed with npm?
- npm list -g
- npm global list
- npm show all
13/25 What is the main advantage of using async/await in Node.js?
- It allows running synchronous operations
- It simplifies the syntax for working with promises, making asynchronous code easier to write and read
- It improves the performance of the Node.js application
- It automatically handles all errors in the application
14/25 What is the use of the 'express' package in Node.js?
- Data encryption
- Web application framework
- File compression
15/25 What is the purpose of the Node.js 'cluster' module?
- To enable load balancing over multiple CPU cores
- To manage a cluster of database connections
- To cluster data for machine learning tasks
- To synchronize the execution of multiple node instances
16/25 What is the best practice for managing asynchronous code in Node.js?
- Using nested callbacks
- Using Promises and async/await
- Executing synchronous functions in parallel
- Avoiding asynchronous code
17/25 Which of the following are considered best practices in Node.js error handling?
- Using try/catch for synchronous code
- Using process.on('error', callback) for global error handling
- Handling errors at the root level of the application
- Using Promises or async/await for asynchronous error handling
18/25 In Node.js, what does the 'path.join()' method do?
- Joins all given path segments together
- Joins two arrays into one
- Concatenates two strings
19/25 What is the purpose of the 'body-parser' middleware in Express apps?
- To parse incoming request bodies
- To authenticate user requests
- To parse URL parameters
20/25 What does the 'fs.writeFileSync()' method do in Node.js?
- Writes data to a file asynchronously
- Writes data to a file, blocking the Node.js event loop until the file is written
- Writes data to multiple files simultaneously
21/25 In Node.js, which of the following is true about environment variables?
- They can store application configuration separately from code
- They are accessible through the 'process.env' object
- They can only be set within the application code
22/25 What is the command to list installed packages in a Node.js project?
- npm list
- npm installed
- node list-packages
23/25 Which of the following is true for process.nextTick() in Node.js?
- It is used to defer the execution of a function until the next loop iteration
- It schedules a function to execute at the beginning of the next event loop
- It is the same as setting a timeout with zero milliseconds
24/25 What is the purpose of the Node.js 'cluster' module?
- To distribute incoming network connections across multiple worker processes
- To manage multiple database clusters
- To enable real-time communication between clients and servers
25/25 How do you make an HTTP POST request using the Axios library in Node.js?
- axios.post('/url', { data })
- axios('/url', 'POST', { data })
- axios.send('POST', '/url', { data })
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