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NodeJS Basics
1/25
Which of the following is a core module in Node.js?
Express
fs
Bootstrap
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2/25
What does the 'event loop' in Node.js do?
Handles asynchronous I/O operations
Generates events for the application
Loops through an array of events
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3/25
What command is used to remove a package in Node.js using npm?
npm delete package-name
npm remove package-name
npm uninstall package-name
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4/25
How can you debug a Node.js application?
Using the debugger statement and Node.js inspector
Using console.log() statements only
By restarting the Node.js server multiple times
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5/25
How does Node.js handle non-blocking operations?
Using callbacks
Using promises
Using async/await syntax
By pausing the execution of the entire application
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6/25
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
Next >
7/25
How do you set an environment variable in Node.js?
process.env.VAR_NAME = 'value';
set VAR_NAME='value';
env.set('VAR_NAME', 'value');
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8/25
What is the purpose of the package.json file in a Node.js application?
To store configuration settings
To define the application entry point
To list dependencies and scripts
To compile the application code
Next >
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
Next >
10/25
What does the 'require' function do in Node.js?
Loads a JavaScript library
Imports a module
Requests data from a web service
Next >
11/25
What is the significance of package-lock.json in a Node.js project?
It locks the versions of the packages installed
It automatically updates packages to their latest versions
It is a backup of the package.json file
It speeds up the npm install process
Next >
12/25
How do you enable strict mode in a Node.js file?
use strict;
enable strict;
strict mode;
Next >
13/25
Which method in the fs module is used to asynchronously delete a file?
fs.unlink()
fs.remove()
fs.delete()
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14/25
In Node.js, how can you listen for and respond to uncaught exceptions?
process.on('uncaughtException', function(err) {});
try...catch on the global level
window.onerror for Node.js applications
Next >
15/25
Which of the following are valid HTTP methods supported by the HTTP module in Node.js?
GET
SEND
POST
REMOVE
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16/25
What is the primary use of the Node.js 'events' module?
Logging events to a file
Creating and handling custom events
Scheduling events for future execution
Next >
17/25
How can you access the query string parameters in an Express route?
req.query
req.params
req.body
Next >
18/25
Which module is used to create a web server in Node.js?
http
server
net
Next >
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
Next >
20/25
Which of these statements about the Node.js 'crypto' module is true?
It provides cryptographic functionality that includes a set of wrappers for OpenSSL's hash, HMAC, cipher, decipher, sign, and verify functions
It is used for creating cryptographically secure random numbers
It can only encrypt data but cannot decrypt
Next >
21/25
What are Promises in Node.js used for?
To handle asynchronous operations
To execute multiple callbacks sequentially
To generate cryptographic keys
Next >
22/25
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
Next >
23/25
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 })
Next >
24/25
What is the difference between 'exports' and 'module.exports' in Node.js?
'exports' is a shorthand for 'module.exports'
'exports' can export multiple objects, functions, or values
'module.exports' can only export a single object, function, or value
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25/25
Which method is an effective way to handle rejected promises in async/await syntax in Node.js?
Using a try/catch block
Using the .catch() method on each promise
Using process.on('unhandledRejection', handler)
Next >
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