{"id":3998,"date":"2025-07-23T12:38:25","date_gmt":"2025-07-23T07:08:25","guid":{"rendered":"https:\/\/www.skilr.com\/blog\/?p=3998"},"modified":"2025-07-23T12:55:34","modified_gmt":"2025-07-23T07:25:34","slug":"top-50-node-js-developer-interview-questions-and-answers","status":"publish","type":"post","link":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/","title":{"rendered":"Top 50 Node JS Developer Interview Questions and Answers"},"content":{"rendered":"\n<p>Node JS has become a cornerstone of modern backend development, powering everything from real\u2011time chat applications to large\u2011scale APIs. Its efficient, event\u2011driven architecture allows developers to build high\u2011performance services using JavaScript on the server. Whether you are a backend engineer, full\u2011stack developer, or DevOps professional, you will often face questions that test your understanding of <a href=\"https:\/\/www.skilr.com\/nodejs-exam\" target=\"_blank\" rel=\"noreferrer noopener\">Node JS Developer fundamentals<\/a>, asynchronous patterns, APIs, testing strategies, performance optimisations, and security best practices.<\/p>\n\n\n\n<p>This guide presents the top fifty Node JS interview questions organised into five focused sections. Each question includes a clear answer and, where helpful, brief code examples. You should attempt each question in your development environment before reading the solution. By following this structured approach, you will strengthen your practical skills and gain the confidence needed to demonstrate your expertise in any technical interview.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Who Should Read This Guide<\/h3>\n\n\n\n<p>This guide is designed for anyone who will work with Node JS in a technical interview. You will find it most useful if you are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node JS Developer and Backend Developers building server\u2011side applications with JavaScript<\/li>\n\n\n\n<li>Full\u2011Stack Engineers who write both client and server code in Node JS<\/li>\n\n\n\n<li>DevOps Professionals automating deployment and monitoring tasks using Node JS tools<\/li>\n\n\n\n<li>Students and Graduates preparing for roles that require a strong understanding of Node JS fundamentals<\/li>\n<\/ul>\n\n\n\n<p>If you plan to develop APIs, real\u2011time applications, or microservices with Node JS, this guide will help you focus on the most common topics and practise clear, concise answers before your interview.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Nodejs Interview Questions and Answers | Node.js Interview Questions (4 Must-Know Concepts) #nodejs\" width=\"1170\" height=\"658\" src=\"https:\/\/www.youtube.com\/embed\/ZdgOi3MthB0?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-elements-281189e97ab5309159be893539362b32\">Core JavaScript, Modules &amp; Package Management | Node JS Developer<\/h3>\n\n\n\n<p><strong>1. What is Node js and how does it differ from browser JavaScript?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node js is a runtime that executes JavaScript on the server, built on Chrome\u2019s V8 engine.<\/li>\n\n\n\n<li>Unlike browser JavaScript, it provides APIs for file I\/O, networking and process management.<\/li>\n<\/ul>\n\n\n\n<p><strong>2. Explain the event loop and its phases.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The event loop handles asynchronous callbacks in cycles called ticks.<\/li>\n\n\n\n<li>Key phases include timers (scheduled callbacks), I\/O callbacks, idle\/prepare, poll (I\/O polling), check (<code>setImmediate<\/code>) and close callbacks.<\/li>\n<\/ul>\n\n\n\n<p><strong>3. What are global objects in Node.js? Give examples.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Global objects are available in every module without import.<\/li>\n\n\n\n<li>Examples:\n<ul class=\"wp-block-list\">\n<li><code>global<\/code> (Node\u2019s global namespace)<\/li>\n\n\n\n<li><code>process<\/code> (information about the current process)<\/li>\n\n\n\n<li><code>Buffer<\/code> (binary data handling)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>4. How do you check Node.js and npm versions?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Node.js version: <code>node --version<\/code><\/li>\n\n\n\n<li>npm version: <code>npm --version<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>5. How do you execute a simple \u201cHello World\u201d HTTP server?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Create a file <code>server.js<\/code> with: javascriptCopyEdit<code>const http = require('http'); http.createServer((req, res) =&gt; { res.end('Hello World'); }).listen(3000);<\/code><\/li>\n\n\n\n<li>Run with <code>node server.js<\/code> and visit <code>http:\/\/localhost:3000<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>6. What is the difference between CommonJS and ES modules in Node js?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CommonJS<\/strong> (default until v13): uses <code>require<\/code> and <code>module.exports<\/code>.<\/li>\n\n\n\n<li><strong>ES modules<\/strong>: use <code>import<\/code> and <code>export<\/code>; enable by setting <code>\"type\": \"module\"<\/code> in <code>package.json<\/code> or using <code>.mjs<\/code> extension.<\/li>\n<\/ul>\n\n\n\n<p><strong>7. How do you export and import modules using <code>require<\/code> and <code>import<\/code>?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CommonJS:<\/strong> <code>\/\/ export module.exports = myFunction; \/\/ import const myFunction = require('.\/myModule');<\/code><\/li>\n\n\n\n<li><strong>ES modules:<\/strong> <code>\/\/ export export function myFunction() { \u2026 } \/\/ import import { myFunction } from '.\/myModule.js';<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>8. How does npm work and what is <code>package.json<\/code>?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>npm<\/strong> manages packages by downloading from the registry into <code>node_modules<\/code>.<\/li>\n\n\n\n<li><strong><code>package.json<\/code><\/strong> records project metadata, dependencies, scripts and versioning rules.<\/li>\n<\/ul>\n\n\n\n<p><strong>9. How do you install, update and remove packages globally and locally?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Local install:<\/strong> <code>npm install express<\/code><\/li>\n\n\n\n<li><strong>Global install:<\/strong> <code>npm install \u2013g nodemon<\/code><\/li>\n\n\n\n<li><strong>Update:<\/strong> <code>npm update &lt;package&gt;<\/code> or globally <code>npm update \u2013g &lt;package&gt;<\/code><\/li>\n\n\n\n<li><strong>Uninstall:<\/strong> <code>npm uninstall &lt;package&gt;<\/code> or <code>npm uninstall \u2013g &lt;package&gt;<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>10. What are semantic versioning rules in <code>package.json<\/code>?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Versions follow <code>MAJOR.MINOR.PATCH<\/code>.\n<ul class=\"wp-block-list\">\n<li><strong>MAJOR<\/strong> breaks compatibility,<\/li>\n\n\n\n<li><strong>MINOR<\/strong> adds features without breaking,<\/li>\n\n\n\n<li><strong>PATCH<\/strong> fixes bugs.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Prefixes (<code>^<\/code> and <code>~<\/code>) control update ranges:\n<ul class=\"wp-block-list\">\n<li><code>^1.2.3<\/code> allows minor and patch updates,<\/li>\n\n\n\n<li><code>~1.2.3<\/code> allows patch updates only.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-elements-5217e508ad14f0c8da4b0e05d73837cf\">Asynchronous Patterns &amp; Streams Questions\u202f | Node JS Developer<\/h3>\n\n\n\n<p><strong>11. Explain callbacks and callback hell. How do you avoid it?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>callback<\/strong> is a function passed into another function to run later.<\/li>\n\n\n\n<li><strong>Callback hell<\/strong> occurs when callbacks are nested deeply, making code hard to read and maintain.<\/li>\n\n\n\n<li><strong>Avoid it<\/strong> by using Promises, organizing code into named functions, or leveraging <code>async<\/code>\/<code>await<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>12. What are Promises and how do you use them?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>Promise<\/strong> represents the eventual result of an asynchronous operation.<\/li>\n\n\n\n<li>It has three states: pending, fulfilled or rejected.<\/li>\n\n\n\n<li>Use with <code>.then()<\/code> for success and <code>.catch()<\/code> for errors: javascriptCopyEdit<code>doAsync() .then(result =&gt; { \u2026 }) .catch(err =&gt; { \u2026 });<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>13. Describe <code>async<\/code>\/<code>await<\/code> and how it simplifies promise handling.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <code>async<\/code> keyword marks a function that returns a Promise.<\/li>\n\n\n\n<li><code>await<\/code> pauses execution until a Promise resolves or rejects.<\/li>\n\n\n\n<li>Code reads sequentially, reducing nesting: <code>async function run() { try { const data = await fetchData(); console.log(data); } catch (err) { console.error(err); } }<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>14. What is the difference between <code>process.nextTick<\/code> and <code>setImmediate<\/code>?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>process.nextTick<\/code><\/strong> queues the callback to run <strong>before<\/strong> the next event\u2011loop tick.<\/li>\n\n\n\n<li><strong><code>setImmediate<\/code><\/strong> queues the callback to run <strong>on<\/strong> the next event\u2011loop iteration, after I\/O events.<\/li>\n<\/ul>\n\n\n\n<p><strong>15. How do you handle uncaught promise rejections?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Listen for the global event: <code>process.on('unhandledRejection', err =&gt; { console.error('Unhandled rejection:', err); process.exit(1); });<\/code><\/li>\n\n\n\n<li>Always attach <code>.catch()<\/code> to Promises or use <code>try\/catch<\/code> with <code>await<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>16. How do you read and write files synchronously and asynchronously?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Asynchronous (non\u2011blocking):<\/strong> <code>fs.readFile('file.txt', 'utf8', (err, data) =&gt; { \u2026 }); fs.writeFile('file.txt', data, err =&gt; { \u2026 });<\/code><\/li>\n\n\n\n<li><strong>Synchronous (blocking):<\/strong> <code>const data = fs.readFileSync('file.txt', 'utf8'); fs.writeFileSync('file.txt', data);<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>17. Explain readable and writable streams in Node.js.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Readable streams<\/strong> emit chunks of data (e.g., file reads).<\/li>\n\n\n\n<li><strong>Writable streams<\/strong> accept chunks for output (e.g., file writes).<\/li>\n\n\n\n<li>They allow processing large data without loading it all into memory.<\/li>\n<\/ul>\n\n\n\n<p><strong>18. How do you pipe streams and why is it useful?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <code>.pipe()<\/code> to connect a readable stream to a writable stream: <code>fs.createReadStream('in.txt').pipe(fs.createWriteStream('out.txt'));<\/code><\/li>\n\n\n\n<li><strong>Useful<\/strong> for efficient data transfer, automatic back\u2011pressure management and cleaner code.<\/li>\n<\/ul>\n\n\n\n<p><strong>19. What are Transform streams and when would you use them?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A <strong>Transform<\/strong> stream is both readable and writable: it modifies data as it passes through (e.g., compression, encryption).<\/li>\n\n\n\n<li>Implement by extending <code>stream.Transform<\/code> or using built\u2011in transforms like <code>zlib<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>20. How do you manage large file uploads or downloads efficiently?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use streams to process data in chunks rather than buffering entire files.<\/li>\n\n\n\n<li>Combine with middleware (e.g., <code>multer<\/code> for uploads) and back\u2011pressure aware piping.<\/li>\n\n\n\n<li>Stream directly to storage services when possible to minimise memory usage.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-elements-3fdc68e8805ecdc216b6639365437840\">HTTP, REST, Frameworks &amp; Debugging Questions\u202f | Node JS Developer<\/h3>\n\n\n\n<p><strong>21. How do you create an HTTP server without frameworks?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the built\u2011in <code>http<\/code> module: <code>const http = require('http'); http.createServer((req, res) =&gt; res.end('OK')).listen(3000);<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>22. What is Express.js and how do you set up a basic route?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Express<\/strong> is a minimal web framework for Node.js.<\/li>\n\n\n\n<li>Basic route: <code>const app = require('express')(); app.get('\/', (req, res) =&gt; res.send('Hello')); app.listen(3000);<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>23. How do you handle middleware in Express?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Middleware functions process requests before routes.<\/li>\n\n\n\n<li>Example: javascriptCopyEdit<code>app.use(express.json()); app.use((req, res, next) =&gt; { console.log(req.path); next(); });<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>24. Explain RESTful API design principles in a Node.js context.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use HTTP methods (GET, POST, PUT, DELETE) for actions.<\/li>\n\n\n\n<li>Resource\u2011oriented URLs (e.g., <code>\/users\/:id<\/code>).<\/li>\n\n\n\n<li>Stateless interactions, proper status codes, and JSON payloads.<\/li>\n<\/ul>\n\n\n\n<p><strong>25. How do you implement CORS and handle security headers?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>CORS:<\/strong> use the <code>cors<\/code> middleware: <code>const cors = require('cors'); app.use(cors({ origin: 'https:\/\/example.com' }));<\/code><\/li>\n\n\n\n<li><strong>Security headers:<\/strong> use <code>helmet<\/code>: javascriptCopyEdit<code>const helmet = require('helmet'); app.use(helmet());<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>26. How do you handle errors in async callbacks and promises?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Callbacks:<\/strong> check and return on <code>err<\/code> argument.<\/li>\n\n\n\n<li><strong>Promises:<\/strong> attach <code>.catch()<\/code> or use <code>try\/catch<\/code> inside <code>async<\/code> functions.<\/li>\n<\/ul>\n\n\n\n<p><strong>27. What is the purpose of <code>domain<\/code> and why is it deprecated?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>domain<\/code> provided disposable contexts for error handling across async calls.<\/li>\n\n\n\n<li>It was deprecated due to unpredictable behavior and replaced by <code>async_hooks<\/code> and structured error workflows.<\/li>\n<\/ul>\n\n\n\n<p><strong>28. How do you use the built\u2011in debugger or <code>node inspect<\/code>?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start with <code>node inspect script.js<\/code>.<\/li>\n\n\n\n<li>Use commands like <code>n<\/code> (next), <code>c<\/code> (continue) and <code>repl<\/code> to evaluate expressions at breakpoints.<\/li>\n<\/ul>\n\n\n\n<p><strong>29. How do you log errors and requests in production?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use logging libraries like <code>winston<\/code> or <code>pino<\/code>.<\/li>\n\n\n\n<li>Log to files or external services, include timestamps and request IDs.<\/li>\n<\/ul>\n\n\n\n<p><strong>30. How do you perform memory leak detection in a Node.js application?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>--inspect<\/code> flag and Chrome DevTools to take heap snapshots.<\/li>\n\n\n\n<li>Analyze retained objects and growth over time.<\/li>\n\n\n\n<li>Consider tools like <code>clinic.js<\/code> or <code>memwatch-next<\/code>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-elements-72d91f74ce3d462f74f1aea30acfab57\">Testing, Performance &amp; Scalability Questions\u202f | Node JS Developer<\/h3>\n\n\n\n<p><strong>31. What testing frameworks are popular for Node.js?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mocha<\/strong>, <strong>Jest<\/strong>, <strong>Jasmine<\/strong>, and <strong>AVA<\/strong> are widely used for unit and integration tests.<\/li>\n<\/ul>\n\n\n\n<p><strong>32. How do you write unit tests with Mocha or Jest?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mocha<\/strong> example: <code>const assert = require('assert'); describe('sum', () =&gt; { it('adds two numbers', () =&gt; { assert.strictEqual(sum(1, 2), 3); }); });<\/code><\/li>\n\n\n\n<li><strong>Jest<\/strong> example: <code>test('adds two numbers', () =&gt; { expect(sum(1, 2)).toBe(3); });<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>33. How do you mock modules or functions in tests?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Jest:<\/strong> use <code>jest.mock('moduleName')<\/code> or <code>jest.spyOn(obj, 'method')<\/code>.<\/li>\n\n\n\n<li><strong>Sinon<\/strong> (with Mocha): use <code>sinon.stub()<\/code> or <code>sinon.mock()<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>34. What is code coverage and how do you measure it?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Coverage shows which lines are executed by tests.<\/li>\n\n\n\n<li>Tools like <strong>nyc<\/strong> (Istanbul) or built\u2011in Jest coverage: <code>nyc mocha # or jest --coverage<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>35. How do you perform end\u2011to\u2011end testing on a Node.js API?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use frameworks like <strong>SuperTest<\/strong> (for HTTP) or <strong>Cypress<\/strong>\/<strong>Playwright<\/strong> for full-stack flows.<\/li>\n\n\n\n<li>Example with SuperTest: <code>const request = require('supertest'); request(app).get('\/users').expect(200, done);<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>36. How do you profile CPU and memory usage in Node.js?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Run with <code>--inspect<\/code> or <code>--inspect-brk<\/code> and use Chrome DevTools\u2019 profiler.<\/li>\n\n\n\n<li>Use <strong>clinic.js<\/strong> or <strong>0x<\/strong> for easier CLI-based profiling.<\/li>\n<\/ul>\n\n\n\n<p><strong>37. What is clustering and how do you implement it?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clustering forks multiple worker processes to utilise all CPU cores.<\/li>\n\n\n\n<li>Example: <code>const cluster = require('cluster'); if (cluster.isMaster) { for (let i = 0; i &lt; require('os').cpus().length; i++) { cluster.fork(); } } else { require('.\/server'); }<\/code><\/li>\n<\/ul>\n\n\n\n<p><strong>38. How do you cache data effectively in a Node.js application?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use in\u2011memory stores (e.g., <strong>lru-cache<\/strong>) or external caches like <strong>Redis<\/strong>\/<strong>Memcached<\/strong>.<\/li>\n\n\n\n<li>Cache responses, database queries or computed results with TTLs and eviction policies.<\/li>\n<\/ul>\n\n\n\n<p><strong>39. Explain load balancing strategies for Node.js servers.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Round\u2011robin<\/strong> at the proxy level (Nginx, HAProxy).<\/li>\n\n\n\n<li><strong>Sticky sessions<\/strong> for stateful apps.<\/li>\n\n\n\n<li><strong>DNS load balancing<\/strong> or cloud\u2011provider LBs for global distribution.<\/li>\n<\/ul>\n\n\n\n<p><strong>40. How do you optimize startup time and reduce latency?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Minimise module imports, lazy\u2011load heavy dependencies.<\/li>\n\n\n\n<li>Pre\u2011compile or bundle code.<\/li>\n\n\n\n<li>Use <strong>Ahead\u2011of\u2011Time<\/strong> compilation tools like <strong>ncc<\/strong> or <strong>pkg<\/strong> to reduce cold\u2011start overhead.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-white-color has-vivid-cyan-blue-background-color has-text-color has-background has-link-color wp-elements-4d4c74e835a696daeb737c947a366c38\">Security Best Practices &amp; Advanced Questions\u202f | Node JS Developer<\/h3>\n\n\n\n<p><strong>41. How do you prevent SQL injection or NoSQL injection attacks?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use parameterised queries or prepared statements rather than string concatenation.<\/li>\n\n\n\n<li>For MongoDB, validate and sanitize inputs, and avoid constructing queries with untrusted data.<\/li>\n<\/ul>\n\n\n\n<p><strong>42. How do you secure environment variables and secrets?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Store secrets in environment variables or dedicated secret\u2011management services (e.g., AWS Secrets Manager).<\/li>\n\n\n\n<li>Never commit <code>.env<\/code> files to version control; add them to <code>.gitignore<\/code>.<\/li>\n<\/ul>\n\n\n\n<p><strong>43. What is Helmet middleware and how does it help?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>helmet<\/code> sets HTTP headers to protect against common web vulnerabilities (e.g., <code>X-Frame-Options<\/code>, <code>Strict-Transport-Security<\/code>).<\/li>\n\n\n\n<li>Simply add <code>app.use(require('helmet')())<\/code> to enable sensible defaults.<\/li>\n<\/ul>\n\n\n\n<p><strong>44. How do you implement rate limiting to prevent abuse?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use middleware like <code>express-rate-limit<\/code> to cap requests per IP\/time window.<\/li>\n\n\n\n<li>Configure sensible limits (e.g., 100 requests per 15 minutes) and use express middleware with Redis or in\u2011memory stores.<\/li>\n<\/ul>\n\n\n\n<p><strong>45. How do you protect against cross\u2011site scripting (XSS) in server responses?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Escape or sanitize user\u2011provided data before rendering in HTML.<\/li>\n\n\n\n<li>Use templating engines with automatic escaping (e.g., Pug, EJS) and set appropriate content\u2011security policies via headers.<\/li>\n<\/ul>\n\n\n\n<p><strong>46. What is gRPC and how do you use it with Node.js?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>gRPC is a high\u2011performance RPC framework using Protocol Buffers.<\/li>\n\n\n\n<li>In Node.js, install <code>@grpc\/grpc-js<\/code> and <code>@grpc\/proto-loader<\/code>, define <code>.proto<\/code> files, load them and create client\/server stubs.<\/li>\n<\/ul>\n\n\n\n<p><strong>47. How do you work with worker threads for CPU\u2011bound tasks?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>worker_threads<\/code> module to offload CPU\u2011intensive work to separate threads without blocking the event loop.<\/li>\n\n\n\n<li>Create a <code>Worker<\/code> with a script and communicate via message passing.<\/li>\n<\/ul>\n\n\n\n<p><strong>48. What are native addons and when would you use them?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Native addons are C\/C++ modules compiled into Node.js to extend functionality or improve performance.<\/li>\n\n\n\n<li>Use when you need low\u2011level system access or high\u2011performance operations not feasible in pure JavaScript.<\/li>\n<\/ul>\n\n\n\n<p><strong>49. How do you deploy a Node.js application using Docker?<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Write<\/strong> a <code>Dockerfile<\/code> starting from an official Node image, copy source, install dependencies and define <code>CMD<\/code>.<\/li>\n\n\n\n<li><strong>Build<\/strong>: <code>docker build -t myapp .<\/code><\/li>\n\n\n\n<li><strong>Run<\/strong>: <code>docker run -d -p 3000:3000 myapp<\/code><\/li>\n<\/ol>\n\n\n\n<p><strong>50. What is the Node.js EventEmitter, and how do you extend it?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>EventEmitter<\/code> allows objects to emit and listen for named events.<\/li>\n\n\n\n<li>Extend by subclassing: javascriptCopyEdit<code>const { EventEmitter } = require('events'); class MyEmitter extends EventEmitter {}<\/code><\/li>\n\n\n\n<li>Use <code>emitter.on('event', handler)<\/code> and <code>emitter.emit('event', data)<\/code>.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Expert Corner<\/h3>\n\n\n\n<p>Node.js\u2019s versatility and performance make it a critical skill for modern backend and full\u2011stack roles. By working through these fifty questions\u2014covering core concepts, asynchronous patterns, API design, testing, performance tuning and security\u2014you will deepen your practical understanding and build the confidence needed to excel in technical interviews. Remember to implement each example in a development environment, consult the official Node.js documentation for further reading, and continue practising beyond this guide.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/www.skilr.com\/nodejs-free-practice-test\" target=\"_blank\" rel=\" noreferrer noopener\"><img data-dominant-color=\"bcb89b\" data-has-transparency=\"false\" style=\"--dominant-color: #bcb89b;\" decoding=\"async\" sizes=\"(max-width: 960px) 100vw, 960px\" src=\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Node-JS-Free-Test.jpg\" alt=\"\" class=\"wp-image-4011 not-transparent\"\/><\/a><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Node JS has become a cornerstone of modern backend development, powering everything from real\u2011time chat applications to large\u2011scale APIs. Its efficient, event\u2011driven architecture allows developers to build high\u2011performance services using JavaScript on the server. Whether you are a backend engineer, full\u2011stack developer, or DevOps professional, you will often face questions that test your understanding of [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[1611,1610,1617,1615,1614,1609,1616,1612,1608,1613],"class_list":{"0":"post-3998","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-uncategorized","8":"tag-advance-node-js-interview-questions-and-answers","9":"tag-interview-questions-and-answers-node-js","10":"tag-js-interview-questions-and-answers","11":"tag-node-interview-question-and-answers","12":"tag-node-js-developer-interview-questions","13":"tag-node-js-interview-questions-and-answers","14":"tag-node-js-interview-questions-and-answers-for-experienced","15":"tag-nodejs-interview-questions-and-answers","16":"tag-top-nodejs-interview-questions-and-answers","17":"tag-web-developer-interview-questions-and-answers"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog<\/title>\n<meta name=\"description\" content=\"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog\" \/>\n<meta property=\"og:description\" content=\"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\" \/>\n<meta property=\"og:site_name\" content=\"Skilr Blog\" \/>\n<meta property=\"article:published_time\" content=\"2025-07-23T07:08:25+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-23T07:25:34+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Anandita Doda\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Anandita Doda\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\"},\"author\":{\"name\":\"Anandita Doda\",\"@id\":\"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a\"},\"headline\":\"Top 50 Node JS Developer Interview Questions and Answers\",\"datePublished\":\"2025-07-23T07:08:25+00:00\",\"dateModified\":\"2025-07-23T07:25:34+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\"},\"wordCount\":1816,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp\",\"keywords\":[\"advance node js interview questions and answers\",\"interview questions and answers node js\",\"js interview questions and answers\",\"node interview question and answers\",\"node js developer interview questions\",\"node js interview questions and answers\",\"node js interview questions and answers for experienced\",\"nodejs interview questions and answers\",\"top nodejs interview questions and answers\",\"web developer interview questions and answers\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\",\"url\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\",\"name\":\"Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp\",\"datePublished\":\"2025-07-23T07:08:25+00:00\",\"dateModified\":\"2025-07-23T07:25:34+00:00\",\"author\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a\"},\"description\":\"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage\",\"url\":\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp\",\"contentUrl\":\"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp\",\"width\":1280,\"height\":720,\"caption\":\"Top 50 Node JS Interview Questions and Answers\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.skilr.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Top 50 Node JS Developer Interview Questions and Answers\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.skilr.com\/blog\/#website\",\"url\":\"https:\/\/www.skilr.com\/blog\/\",\"name\":\"Skilr Blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.skilr.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a\",\"name\":\"Anandita Doda\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/440295a704e9c104e3a16811183811618885ee5b19dae8f4007736a01fb12a68?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/440295a704e9c104e3a16811183811618885ee5b19dae8f4007736a01fb12a68?s=96&d=mm&r=g\",\"caption\":\"Anandita Doda\"},\"url\":\"https:\/\/www.skilr.com\/blog\/author\/anandita2001dodagmail-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog","description":"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/","og_locale":"en_US","og_type":"article","og_title":"Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog","og_description":"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.","og_url":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/","og_site_name":"Skilr Blog","article_published_time":"2025-07-23T07:08:25+00:00","article_modified_time":"2025-07-23T07:25:34+00:00","og_image":[{"width":1280,"height":720,"url":"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.jpg","type":"image\/jpeg"}],"author":"Anandita Doda","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Anandita Doda","Est. reading time":"9 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#article","isPartOf":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/"},"author":{"name":"Anandita Doda","@id":"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a"},"headline":"Top 50 Node JS Developer Interview Questions and Answers","datePublished":"2025-07-23T07:08:25+00:00","dateModified":"2025-07-23T07:25:34+00:00","mainEntityOfPage":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/"},"wordCount":1816,"commentCount":0,"image":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp","keywords":["advance node js interview questions and answers","interview questions and answers node js","js interview questions and answers","node interview question and answers","node js developer interview questions","node js interview questions and answers","node js interview questions and answers for experienced","nodejs interview questions and answers","top nodejs interview questions and answers","web developer interview questions and answers"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/","url":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/","name":"Top 50 Node JS Developer Interview Questions and Answers - Skilr Blog","isPartOf":{"@id":"https:\/\/www.skilr.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage"},"image":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp","datePublished":"2025-07-23T07:08:25+00:00","dateModified":"2025-07-23T07:25:34+00:00","author":{"@id":"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a"},"description":"Get ready for your next tech interview with this curated list of the Top 50 Node js Interview Questions and Answers.","breadcrumb":{"@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#primaryimage","url":"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp","contentUrl":"https:\/\/www.skilr.com\/blog\/wp-content\/uploads\/2025\/07\/Top-50-Node-JS-Interview-Questions-and-Answers.webp","width":1280,"height":720,"caption":"Top 50 Node JS Interview Questions and Answers"},{"@type":"BreadcrumbList","@id":"https:\/\/www.skilr.com\/blog\/top-50-node-js-developer-interview-questions-and-answers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.skilr.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Top 50 Node JS Developer Interview Questions and Answers"}]},{"@type":"WebSite","@id":"https:\/\/www.skilr.com\/blog\/#website","url":"https:\/\/www.skilr.com\/blog\/","name":"Skilr Blog","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.skilr.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/218260d62d3339338ae5afdb5f5c449a","name":"Anandita Doda","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.skilr.com\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/440295a704e9c104e3a16811183811618885ee5b19dae8f4007736a01fb12a68?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/440295a704e9c104e3a16811183811618885ee5b19dae8f4007736a01fb12a68?s=96&d=mm&r=g","caption":"Anandita Doda"},"url":"https:\/\/www.skilr.com\/blog\/author\/anandita2001dodagmail-com\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/posts\/3998","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/comments?post=3998"}],"version-history":[{"count":6,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/posts\/3998\/revisions"}],"predecessor-version":[{"id":4017,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/posts\/3998\/revisions\/4017"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/media\/4012"}],"wp:attachment":[{"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/media?parent=3998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/categories?post=3998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skilr.com\/blog\/wp-json\/wp\/v2\/tags?post=3998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}