URL Parameters and Query Strings
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Questions and Answers

Which method is used to read files on your computer in Node.js?

  • fs.writeFile()
  • fs.appendFile()
  • fs.open()
  • fs.readFile() (correct)
  • Which method is used to create a new file and append content to it in Node.js?

  • fs.open()
  • fs.appendFile() (correct)
  • fs.writeFile()
  • fs.readFile()
  • Which method is used to create a new, empty file in Node.js?

  • fs.appendFile()
  • fs.open() (correct)
  • fs.readFile()
  • fs.writeFile()
  • Which method is used to update a file in Node.js by replacing its content if it exists?

    <p>fs.writeFile()</p> Signup and view all the answers

    Which of the following is a limitation of server-side programming?

    <p>All of the above</p> Signup and view all the answers

    What is the key feature of Node.js that allows it to handle multiple requests concurrently?

    <p>Asynchronous and Non-blocking</p> Signup and view all the answers

    Which of the following is NOT a use case for Node.js?

    <p>Database Management</p> Signup and view all the answers

    What is the key difference between Node.js and JavaScript in browsers?

    <p>Node.js provides native system access</p> Signup and view all the answers

    Which of the following is NOT a characteristic of client-side programming?

    <p>Interacts with the server to deliver user experience</p> Signup and view all the answers

    Which programming environment allows JavaScript to run outside of the browser?

    <p>Node.js environment</p> Signup and view all the answers

    Which of the following is NOT one of the three types of asynchronous programming models in Node.js?

    <p>Synchronous programming</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>HTTP module</p> Signup and view all the answers

    Which module is commonly used in modern web development?

    <p>ESM</p> Signup and view all the answers

    Which syntax is used to import the HTTP module in Node.js?

    <p>import http from 'http'</p> Signup and view all the answers

    What is the purpose of the createServer() method in the HTTP module?

    <p>To create an HTTP server</p> Signup and view all the answers

    What is the purpose of the res.writeHead() method in the HTTP module?

    <p>To set the content type of the response</p> Signup and view all the answers

    Which syntax is used to create asynchronous code that looks like synchronous code in JavaScript?

    <p>Async/await syntax</p> Signup and view all the answers

    Which keyword is used to include a module in a Node.js file?

    <p>require</p> Signup and view all the answers

    What is a module in Node.js?

    <p>A set of functions you want to include in your application</p> Signup and view all the answers

    What is the purpose of the 'export' keyword in Node.js?

    <p>To make properties and methods available outside the module file</p> Signup and view all the answers

    Which method is used to replace the content of a specified file in Node.js?

    <p>fs.writeFile()</p> Signup and view all the answers

    Which method is used to delete a file in Node.js?

    <p>fs.unlink()</p> Signup and view all the answers

    Which method is used to rename a file in Node.js?

    <p>fs.rename()</p> Signup and view all the answers

    What module is used for working with file uploads in Node.js?

    <p>formidable</p> Signup and view all the answers

    How can the Formidable module be installed in a Node.js application?

    <p>npm install formidable</p> Signup and view all the answers

    What should be done if an error occurs while opening a requested file in a Node.js application?

    <p>Throw a 404 error</p> Signup and view all the answers

    Which of the following is true about asynchronous programming in Node.js?

    <p>It is executed concurrently and continues executing other tasks while waiting for the completion of asynchronous tasks in the background.</p> Signup and view all the answers

    Which mechanism is used to handle asynchronous operations in JavaScript?

    <p>Promises</p> Signup and view all the answers

    What is a common drawback of using callbacks for asynchronous operations?

    <p>Callbacks can result in deeply nested and hard-to-read code.</p> Signup and view all the answers

    What is the purpose of the 'package.json' file in Node.js?

    <p>To define the type of module system used in the code</p> Signup and view all the answers

    Which type of programming mainly focuses on server-side web programming?

    <p>Server-side programming</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>HTTP module</p> Signup and view all the answers

    What is the purpose of the 'package.json' file in Node.js?

    <p>To define the dependencies and metadata of a Node.js project</p> Signup and view all the answers

    Which module is commonly used in modern web development?

    <p>ESM Import/Export</p> Signup and view all the answers

    Which method is used to create an HTTP server in Node.js?

    <p>createServer()</p> Signup and view all the answers

    What is the purpose of the res.writeHead() method in the HTTP module?

    <p>To set the status code and response headers</p> Signup and view all the answers

    How can the Formidable module be installed in a Node.js application?

    <p>npm install formidable</p> Signup and view all the answers

    Which of the following is a key feature of Node.js?

    <p>Asynchronous and Non-blocking</p> Signup and view all the answers

    What is the purpose of the 'package.json' file in Node.js?

    <p>To specify the dependencies of a Node.js project</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>Express.js</p> Signup and view all the answers

    What is a common use case for Node.js?

    <p>Real-time Applications</p> Signup and view all the answers

    Which method is used to create a new file and append content to it in Node.js?

    <p>fs.appendFile()</p> Signup and view all the answers

    What is the purpose of the createServer() method in the HTTP module?

    <p>To create a new HTTP server</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>http</p> Signup and view all the answers

    What is a module in Node.js?

    <p>A reusable block of code</p> Signup and view all the answers

    Which method is used to handle asynchronous operations in JavaScript?

    <p>All of the above</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>http</p> Signup and view all the answers

    What is a module in Node.js?

    <p>A JavaScript file that exports a set of functions or variables</p> Signup and view all the answers

    What is the purpose of the 'package.json' file in Node.js?

    <p>To specify the dependencies of a Node.js project</p> Signup and view all the answers

    Which syntax is used to include a module in a Node.js file?

    <p>const http = require('http');</p> Signup and view all the answers

    Which method is used to read files on your computer in Node.js?

    <p>fs.readFile('demo.txt', 'utf-8', (err, data) =&gt; { ... });</p> Signup and view all the answers

    What is the purpose of the 'export' keyword in Node.js?

    <p>To make properties and methods available outside the module file</p> Signup and view all the answers

    What is a Module in Node.js?

    <p>A set of functions you want to include in your application</p> Signup and view all the answers

    Which method is used to replace the content of a specified file in Node.js?

    <p>fs.writeFile()</p> Signup and view all the answers

    Which method is used to delete a file in Node.js?

    <p>fs.unlink()</p> Signup and view all the answers

    Which module is commonly used for handling file uploads in Node.js?

    <p>formidable</p> Signup and view all the answers

    Which method is used to replace the content of a specified file in Node.js?

    <p>fs.writeFile()</p> Signup and view all the answers

    What is the purpose of the fs.unlink() method in Node.js?

    <p>To delete a specified file</p> Signup and view all the answers

    Which module in Node.js is commonly used for handling HTTP requests and responses?

    <p>http</p> Signup and view all the answers

    Match the following Node.js modules with their primary usage:

    <p>http = Handling HTTP requests and responses fs = Working with the file system url = Parsing URL strings path = Working with file paths</p> Signup and view all the answers

    Match the following Node.js use cases with their descriptions:

    <p>Web Applications = Creating dynamic web pages Real-time Applications = Building chat applications or gaming applications Streaming Applications = Handling large amounts of data in real time API Gateways = Managing and controlling access to multiple APIs</p> Signup and view all the answers

    Match the following Node.js features with their descriptions:

    <p>Asynchronous and Non-blocking = Allows multiple requests to be handled simultaneously JavaScript Everywhere = Uses the same programming language on both client and server-side Scalability = Ability to handle a large number of requests without performance degradation Microservices Architecture = Building complex applications as a collection of small, independent services</p> Signup and view all the answers

    Match the following key points about Node.js with their descriptions:

    <p>Fast and performant = Uses a JIT-based engine for greater server-side performance Large community and high popularity = Used by many developers and famous companies Single language in both client and server-side programming = Reduces the complexity of the development process Node.js files have extension '.js' = CommonJS or ES Module</p> Signup and view all the answers

    Match the following concepts with their descriptions:

    <p>Client-side programming = All the code and data is executed and stored locally, mainly for user interface (UI) rendering Server-side programming = Code is executed on a web server, mainly focuses on delivering complete and interactive user experience Asynchronous code = Code that allows other code to run in the meantime, without waiting for it to finish Node.js File I/O = A module in Node.js that allows reading, creating, updating, and deleting files on a computer</p> Signup and view all the answers

    Match the following Node.js concepts with their descriptions:

    <p>package.json = A file used for managing dependencies and scripts in a Node.js application Express.js = A framework that provides additional features and simplifies the development process in Node.js HTTP module = A module in Node.js that is commonly used for handling HTTP requests and responses Formidable module = A module in Node.js that is commonly used for handling file uploads</p> Signup and view all the answers

    Match the following types of programming with their key characteristics:

    <p>Client-side programming = Code and data is executed and stored locally, mainly for user interface (UI) rendering Server-side programming = Code is executed on a web server, mainly focuses on delivering complete and interactive user experience Synchronous code = Code that is executed in a sequential manner, one statement at a time Asynchronous code = Code that allows other code to run in the meantime, without waiting for it to finish</p> Signup and view all the answers

    Match the following Node.js methods with their descriptions:

    <p>writeFile() = Replaces the specified file and content unlink() = Deletes the specified file rename() = Renames the specified file createServer() = Creates an HTTP server</p> Signup and view all the answers

    Match the following file operations with their Node.js methods:

    <p>Replace the content of the file 'mynewfile3.txt' = writeFile() Delete 'mynewfile2.txt' = unlink() Rename 'mynewfile1.txt' to 'myrenamedfile.txt' = rename() Create an HTTP server = createServer()</p> Signup and view all the answers

    Match the following file upload-related terms with their descriptions:

    <p>Formidable = A module for working with file uploads in Node.js npm install formidable = Command to download and install the Formidable module formidable = Node.js module for parsing form data, especially file uploads import formidable from 'formidable' = Code to include the Formidable module in an application</p> Signup and view all the answers

    Match the following JavaScript programming concepts with their descriptions:

    <p>Promises = Used to handle asynchronous operations in JavaScript Async/await = A newer syntax in JavaScript that simplifies asynchronous programming Modules = Considered to be the same as JavaScript libraries, a set of functions you want to include in your application try/catch block = Used to handle errors in JavaScript, i.e., rejected Promise</p> Signup and view all the answers

    Match the following Node.js programming concepts with their definitions:

    <p>Built-in Modules = Node.js has a set of these modules which can be used without any further installation Create Your Own Modules = You can create these and easily include them in your Node.js applications require() = A method used to import modules in Node.js using CommonJS module import syntax ESM Import syntax = A module import/export syntax used in Node.js that is part of ECMAScript 2015</p> Signup and view all the answers

    Match the following Node.js methods with their purposes:

    <p>fs.readFile() = Used to read files on your computer in Node.js http.createServer() = Used to create an HTTP server in Node.js res.writeHead() = Used to write the HTTP header res.end() = Used to end the response process</p> Signup and view all the answers

    Match the following JavaScript module import syntaxes with their definitions:

    <p>const http = require('http'); = Part of the CommonJS module import syntax import http from 'http'; = Uses ESM (ECMAScript 2015) module import/export syntax ./ = Used to locate a module in the same folder as the Node.js file export = A keyword used to make properties and methods available outside the module file</p> Signup and view all the answers

    Match the following Node.js file system methods with their descriptions:

    <p>fs.appendFile() = Appends specified content to a file. If the file does not exist, the file will be created. fs.open() = Opens a specified file for writing. If the file does not exist, an empty file is created. fs.writeFile() = Replaces the specified file and content if it exists. If the file does not exist, a new file, containing the specified content, will be created. fs.readFile() = Used to read files on your computer.</p> Signup and view all the answers

    Match the following URL components with their descriptions:

    <p>req.url = The URL of the current request req.headers.host = The host of the current request myURL.search = The search params for the request URL searchParams.get('param1') = The value of 'param1' in the search params</p> Signup and view all the answers

    Match the following Node.js code snippets with their outputs:

    <p>console.log(req.url); = Output: /.year=2017&amp;month=July console.log(<code>http://${req.headers.host}</code>); = Output: <a href="http://localhost:8080">http://localhost:8080</a> const txt = searchParams.get('year') + ' ' + searchParams.get('month'); res.end(txt); = Output: 2017 July console.log('Saved.'); = Output: Saved.</p> Signup and view all the answers

    Match the following Node.js file system methods with their file creation behavior:

    <p>fs.appendFile() = Creates a file if it does not exist fs.open() = Creates an empty file if it does not exist fs.writeFile() = Creates a new file with specified content if it does not exist fs.readFile() = Does not create a file</p> Signup and view all the answers

    Match the following programming concepts with their descriptions:

    <p>Synchronous programming = Executed sequentially and waits for each task to be completed before moving on to the next one. Asynchronous programming = Executed concurrently and continues executing other tasks while waiting for the completion of asynchronous tasks in the background. Callback = In the past, due to the nature of asynchronous Javascript, many Javascript functions accept a callback argument that allows you to define code to be run after the task is completed (or failed). Promise = A new mechanism to handle asynchronous operations compared to traditional callbacks. Represents the eventual completion (or failure) of an asynchronous operation and its resulting value.</p> Signup and view all the answers

    Match the following Node.js features with their descriptions:

    <p>ESM module = The newer module system for Node.js that enables ESM module support. package.json = A file that needs to be created in order to enable the ESM module support for Node.js. Node.js file initiation = The process that needs to be done before any action can take place on a file in Node.js. Callback hell = A term used to describe a situation where callbacks are nested within other callbacks, resulting in deeply nested and hard-to-read code.</p> Signup and view all the answers

    Match the type of programming with its characteristics:

    <p>Synchronous programming = Predictable execution flow Asynchronous programming = Especially useful for waiting for I/O operation, i.e., remote call and File I/O Callback = Usually used when doing I/O, i.e., downloading files, doing File I/O, waiting for remote replies Promise = Allows defined callbacks to be run after the tasks are completed or settled in a chained way</p> Signup and view all the answers

    Match the following Node.js terms with their definitions:

    <p>Promise = A mechanism to handle asynchronous operations in Node.js that represents the eventual completion (or failure) of an asynchronous operation and its resulting value. Callback hell = A term used to describe a situation in Node.js where callbacks are nested within other callbacks, resulting in deeply nested and hard-to-read code. package.json = A file in Node.js that needs to be created to enable the ESM module support. ESM module = The newer module system for Node.js that requires the creation of a 'package.json' file.</p> Signup and view all the answers

    Match the following Node.js module import statements with their correct syntax:

    <p>HTTP module = $import$ http $from$ 'http' URL module = $import$ { URL } $from$ 'url' ESM Import = $import$ http $from$ 'http' CommonJS Import = $const$ http $=$ $require$('http')</p> Signup and view all the answers

    Match the following Node.js HTTP module methods with their correct descriptions:

    <p>$createServer()$ = Creates an HTTP server that listens to server ports and gives a response back to the client $writeHead()$ = Sends a response header to the request $write()$ = Sends a response to the client $end()$ = Ends the response process</p> Signup and view all the answers

    Match the following Node.js HTTP module methods with their correct syntax:

    <p>$createServer()$ = $http.createServer((req, res) =&gt; { ... }).listen(8080);$ $writeHead()$ = $res.writeHead(200, {'Content-Type': 'text/html; charset=utf8'});$ $write()$ = $res.write('Hello World.');$ $end()$ = $res.end();$</p> Signup and view all the answers

    Match the following Node.js module export statements with their correct syntax:

    <p>ESM Export = $export$ { MyDateTime } $from$ 'http' CommonJS Export = $exports.MyDateTime$ $=$ $function$ () { return Date(); }</p> Signup and view all the answers

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