The tech hiring landscape is fiercely competitive, and mastering node js interview questions can make the difference between landing an offer and walking away disappointed. A structured study plan, real-world practice, and tools like Verve AI’s Interview Copilot are the fastest route to confidence. Let’s dive in.
What are node js interview questions?
Node js interview questions are targeted prompts employers use to measure a candidate’s understanding of server-side JavaScript, event-driven architecture, performance tuning, and ecosystem tooling. They span fundamentals such as the event loop, asynchronous patterns, built-in modules, process management, and practical scenarios like error handling or clustering. Grasping these node js interview questions signals you can build, debug, and scale production-grade applications.
Why do interviewers ask node js interview questions?
Hiring teams rely on node js interview questions to uncover your depth of knowledge, coding discipline, and decision-making under pressure. Strong answers reveal whether you can translate theory into maintainable code, optimize non-blocking I/O, select the right libraries, and troubleshoot live incidents. Ultimately, these node js interview questions help interviewers gauge how quickly you’ll contribute to team velocity.
Preview List: The 30 Node Js Interview Questions
What is Node.js and how does it work?
What is the difference between Node.js and JavaScript?
How does Node.js handle asynchronous programming?
Why is Node.js single-threaded?
What is the Event Loop in Node.js?
How would you create a simple “Hello World” server?
What is synchronous versus asynchronous programming?
What is REPL in Node.js?
What is Callback Hell and how do you avoid it?
What are Promises in Node.js?
How do you use async/await in Node.js?
What is package.json and why is it important?
Name some built-in modules in Node.js.
What is middleware in Node.js?
What is module.exports used for?
Compare Express.js with Node.js.
What is event-driven programming?
What does the events module do?
Explain the Buffer class in Node.js.
What is a first-class function in JavaScript?
Differentiate asynchronous and synchronous APIs in Node.js.
What is the difference between fork() and spawn()?
How do you manage control flow in asynchronous functions?
What is the purpose of the require() function?
List common Node.js frameworks and their uses.
How does Node.js handle errors?
What role does NPM play in Node.js projects?
Explain what a Node.js process is.
Which tools are popular for testing in Node.js?
How does Node.js support clustering?
1. What is Node.js and how does it work?
Why you might get asked this:
Understanding the foundational runtime anchors every other node js interview questions topic. Interviewers ask to confirm you know Node.js is not a language but a V8-powered, event-driven environment that leverages non-blocking I/O to handle concurrent connections on a single thread. They want evidence that you can articulate how the event loop coordinates the call stack, task queues, and background threads to achieve high throughput without thread contention.
How to answer:
Start by defining Node.js as an open-source, cross-platform JavaScript runtime built on Chrome’s V8 engine. Explain that it operates on a single thread using libuv to delegate intensive I/O to thread pools, then returns callbacks or promises via the event loop. Emphasize practical benefits—low latency APIs, reduced overhead, and a unified language across stack layers—while noting scenarios where CPU-bound tasks require offloading.
Example answer:
Sure. Node.js is essentially a wrapper around Google’s V8 engine that lets JavaScript run outside the browser. It keeps just one main thread for JavaScript execution, while libuv hands off disk, network, or crypto operations to background threads. When those operations finish, their callbacks are queued and the event loop pulls them back for execution. The result is highly efficient I/O: on one project I built a chat gateway that easily handled thousands of WebSocket users with sub-100 ms latency. That real-time capability is exactly what interviewers assess in node js interview questions because it shows you understand why the runtime was designed and when to use it.
2. What is the difference between Node.js and JavaScript?
Why you might get asked this:
Separating the language from its runtime avoids conceptual confusion that often surfaces during node js interview questions. Interviewers are checking whether you appreciate that JavaScript is ECMAScript-defined syntax, whereas Node.js is an execution environment with APIs like fs or cluster. This distinction clarifies where certain features originate and how portability works across browsers and servers.
How to answer:
Define JavaScript as the language specification used by both browsers and servers. Contrast that with Node.js, which bundles the V8 engine, C++ bindings, and an extensive standard library for server-side tasks like file access or networking. Mention that client-side JavaScript accesses the DOM, whereas Node.js can’t unless additional libraries simulate it. Close by noting that understanding the separation prevents incorrect assumptions about API availability.
Example answer:
I usually describe JavaScript as the grammar and vocabulary, while Node.js is the stage and props. The language stays the same whether I’m writing array methods in Chrome DevTools or on the server, but only Node.js gives me modules like fs, net, or the process object. For instance, in a browser you’d manipulate the DOM; on my recent e-commerce API I used Node.js to stream logs to a file and manage TLS sockets. Demonstrating that separation tells an interviewer I’m fluent in both client and server contexts, which is core to several node js interview questions.
3. How does Node.js handle asynchronous programming?
Why you might get asked this:
Non-blocking I/O is the essence of Node.js. Interviewers probe this area because real applications demand efficient concurrency without thread bloat. By exploring this node js interview questions topic, they test your understanding of callbacks, promises, async/await, and the event loop phases such as timers, pending callbacks, poll, check, and close.
How to answer:
Explain that Node.js delegates heavy I/O to worker threads in libuv or the OS, returns control to the event loop, and executes callbacks when tasks complete. Describe evolution from nested callbacks to promises, then async/await for flatter syntax. Include mention of microtasks and macrotasks ordering. Highlight the importance of error handling with try/catch or .catch and ensuring long CPU work is offloaded.
Example answer:
In Node.js, the mantra is don’t block the thread. Let’s say I start a file read; Node hands that request to the kernel, releases the thread, and keeps serving other clients. When the kernel signals completion, the associated callback is placed in the poll queue. The event loop eventually picks it up, so my code continues seamlessly. I prefer async/await because it reads synchronously yet stays non-blocking; on a financial analytics service I used it to orchestrate parallel API hits, slicing response times in half. Calling out the underlying mechanics shows I’m not just using syntactic sugar, which is key for many node js interview questions.
4. Why is Node.js single-threaded?
Why you might get asked this:
This question gauges architectural comprehension. Interviewers want to hear how running JavaScript on a single thread eliminates locking complexities and harnesses the event loop for concurrency. They also test whether you know the implications: good for I/O-bound tasks but requiring clustering or worker threads for CPU-heavy work. It appears frequently in node js interview questions that explore performance trade-offs.
How to answer:
State that JavaScript’s heritage comes from the browser, which historically used a single UI thread. Node.js preserves that model to avoid multithreaded memory contention. Concurrency is achieved via asynchronous callbacks, not parallel JS execution. Acknowledge that Node now offers worker threads for CPU work, and clustering can exploit multi-core CPUs, but core design remains single-threaded for simplicity and speed.
Example answer:
Node.js keeps one JavaScript thread so I don’t wrestle with locks or race conditions. Instead, libuv works behind the scenes on its own thread pool, plus the kernel can do asynchronous syscalls. For compute-intense image processing in a past project, I fired up worker threads so the main event loop never froze. That balance of simplicity and optional parallelism is why interviewers put this on their node js interview questions list—they want to ensure I understand when the single-thread model shines and when to supplement it.
5. What is the Event Loop in Node.js?
Why you might get asked this:
The event loop drives everything from timer callbacks to I/O completion. Mastering its phases differentiates junior from senior developers during node js interview questions. Recruiters can judge if you can predict execution order, avoid starvation, and debug latency spikes caused by a busy loop.
How to answer:
Describe the event loop as an endless cycle that checks various queues: timers, pending callbacks, idle/prepare, poll, check, and close. Emphasize that it pulls tasks whose I/O has finished and runs their JavaScript callbacks sequentially. Mention microtasks processed after each phase. Conclude by noting that blocking the loop with heavy computation stalls the entire server.
Example answer:
I picture the event loop as a bouncer rotating through six club rooms. Timers fire first, then any I/O deferred from the previous loop, libuv polls for new events, setImmediate callbacks execute in the check phase, and so on. On a monitoring dashboard I built, a heavy JSON parse once delayed other requests; profiling showed a 200 ms block in the poll phase, so I moved parsing into a worker thread. Demonstrating that operational insight scores points on node js interview questions because it shows I can optimize production latency.
6. How would you create a simple “Hello World” server?
Why you might get asked this:
Although basic, this node js interview questions item confirms hands-on familiarity with the http module, port binding, and response handling. Interviewers quickly gauge whether you’ve actually spun up a Node.js server or only read about it theoretically.
How to answer:
Outline the minimal steps: import the http module, invoke createServer with a request listener, set response headers, end the response with text, and call listen on a port. Mention proper error handling and graceful shutdown for real-world usage. Emphasize that even small scripts rely on asynchronous callbacks for incoming requests.
Example answer:
In practice I import http, pass a function that receives req and res, write a 200 status with Content-Type text/plain, send back Hello World, then listen on, say, port 3000. I like to add a console log so I know the service is ready. When crafting production code, I plug in a SIGTERM handler to close connections cleanly. Knowing that flow demonstrates end-to-end awareness the moment node js interview questions move from theory to hands-on skills.
7. What is synchronous versus asynchronous programming?
Why you might get asked this:
Interviewers use this node js interview questions topic to ensure you recognize the performance impact of blocking operations. They expect you to differentiate ordered, blocking execution (synchronous) from non-blocking, event-driven flows (asynchronous) and articulate why Node.js favors the latter in I/O-heavy scenarios.
How to answer:
Define synchronous as tasks executed one after another; the thread waits for each to finish. Contrast with asynchronous, where tasks start, yield control, then signal completion later. Provide Node.js examples: readFileSync blocking versus readFile callback. Tie back to scalability and CPU utilization, noting that synchronous code can still be okay for startup scripts or rare admin tooling.
Example answer:
When I call fs.readFileSync, the server halts until the disk returns data—no other requests are handled. Switching to fs.promises.readFile allows Node.js to keep serving traffic while the kernel does its work. On a file-upload microservice, that change alone tripled throughput under load tests. Illustrating both patterns and their trade-offs answers node js interview questions decisively because it blends concept and measurable impact.
8. What is REPL in Node.js?
Why you might get asked this:
A quick REPL session accelerates debugging, learning, and live experimentation. Interviewers want to know if you leverage this built-in tool to prototype logic or inspect values, which hints at your workflow efficiency during node js interview questions.
How to answer:
Explain that REPL stands for Read-Eval-Print-Loop: it reads user input, evaluates it, prints the result, then loops. It supports multi-line expressions, underscore variable for last result, and .help, .break commands. Mention practical uses like testing a module before integrating it or evaluating Math operations without leaving the terminal.
Example answer:
I use REPL almost daily. If I’m unsure about a regex, I jump into node, paste the pattern, and instantly see matches. Recently, when optimizing array sorting, I iterated a few comparator functions right in REPL, timed them with console.time, and chose the fastest. Sharing that workflow during node js interview questions shows I’m resourceful and comfortable with the runtime’s native tooling.
9. What is Callback Hell and how do you avoid it?
Why you might get asked this:
Nested callbacks can degrade readability and maintainability, so interviewers probe this common pitfall in node js interview questions. They expect strategies like modularization, promises, async/await, or control-flow libraries.
How to answer:
Define callback hell as deeply nested anonymous functions triggered sequentially. Outline problems—hard debugging, error propagation complexity. Provide remedies: break functions into named steps, return promises, leverage async/await for linear flow, or use utilities like async.js. Stress consistent error-first callback patterns if callbacks remain.
Example answer:
My rule: once I hit two levels of indentation, I refactor. On a data-migration script, I had sequential reads, transformations, and writes. It started as four nested callbacks; I wrapped each step into its own promise and awaited them inside an async function. The code flattened to a clean top-down narrative, errors caught in a single try/catch. Communicating that evolution addresses node js interview questions by demonstrating both recognition of the issue and concrete fixes.
10. What are Promises in Node.js?
Why you might get asked this:
Promises are foundational to modern asynchronous JavaScript. Employers use this node js interview questions item to check your grasp of states (pending, fulfilled, rejected), chaining, and error bubbling, ensuring you can write maintainable async code.
How to answer:
Explain that a promise represents a future value. It starts pending, then settles to fulfilled or rejected. You attach .then for success and .catch for errors, enabling sequential or parallel flows with Promise.all or Promise.race. Mention that promises solve inversion of control and callback hell by returning the promise object.
Example answer:
When I query a database, I don’t want execution to freeze, so I return a promise that resolves with the rows. I can chain another .then to transform the data, and one .catch to handle any connection issues. This pattern let me parallelize three external APIs in a payroll service using Promise.all, cutting total latency from 1.5 s to 500 ms. That tangible benefit is what interviewers dig for in node js interview questions.
11. How do you use async/await in Node.js?
Why you might get asked this:
Async/await simplifies promise syntax and appears heavily in production code. Node js interview questions on this topic gauge if you know how it translates to promises under the hood, how to handle errors, and where parallelization is still manual.
How to answer:
Define async as a function that returns a promise. Inside, await pauses execution until the awaited promise settles, but doesn’t block the overall event loop. Show awareness that await only works inside async. Emphasize using try/catch for errors and Promise.all for concurrent awaits. Note version support since Node 7.6 with --harmony.
Example answer:
In an order-processing function I use async to declare processOrder, then await steps like validateInput, chargeCard, and sendReceipt. The logic reads top-down like synchronous code, yet each step remains non-blocking. For independent tasks—fetching inventory and pricing—I wrap awaits in Promise.all so they run in parallel. That pattern balances readability and performance, answering node js interview questions about async/await best practices.
12. What is package.json and why is it important?
Why you might get asked this:
Package.json is the manifest of any Node project. Understanding it signals you can manage dependencies, scripts, semantic versioning, and metadata, a staple skill highlighted in node js interview questions.
How to answer:
Describe package.json as a JSON file that lists project name, version, description, main entry, scripts, dependencies, devDependencies, engines, and more. Explain version ranges like ^ and ~, and how npm or yarn reads it to install modules. Mention scripts for test, start, build to automate workflows.
Example answer:
On my last microservice, package.json listed express and joi under dependencies, with jest and supertest under devDependencies. I set "start" to node src/index.js and "test" to jest --runInBand. When I push to CI, the runner executes npm ci, ensuring the exact lockfile versions. That manifest kept the team in sync, which node js interview questions often highlight as crucial for reproducible builds.
13. Name some built-in modules in Node.js.
Why you might get asked this:
Using built-in modules reduces external dependencies. Interviewers list this in node js interview questions to test your familiarity with core APIs like fs, path, http.
How to answer:
Mention modules such as http, https, fs, path, url, events, crypto, stream, net, os, util, zlib. Explain one-liner uses: fs to read files, crypto for hashing, stream for efficient I/O.
Example answer:
I lean on path.join for cross-platform file paths, crypto.randomBytes for secure tokens, and stream.pipeline to compress uploads with zlib. Relying on these internals eliminates extra packages and attack surface, a point that resonates well when answering node js interview questions about security and performance.
14. What is middleware in Node.js?
Why you might get asked this:
Middleware is central to frameworks like Express. Interviewers incorporate it into node js interview questions to see if you can structure request pipelines for logging, auth, or error handling.
How to answer:
Define middleware as a function with signature (req, res, next) that can alter request/response or terminate the cycle. Explain ordering matters, you can mount globally or per route, and use error-handling middleware with four arguments.
Example answer:
In my Express API, a JWT middleware decodes tokens, attaches user info to req, then calls next. A subsequent route handler relies on that data. If verification fails, the middleware sends a 401 response and never calls next, short-circuiting. Discussing that flow demonstrates real usage in node js interview questions.
15. What is module.exports used for?
Why you might get asked this:
Modularity fosters maintainability. This node js interview questions item checks if you know how CommonJS exports make functions or values accessible across files.
How to answer:
Explain that each file is a module with its own scope. Assigning to module.exports exposes objects; require() returns that reference. Distinguish between module.exports and exports alias.
Example answer:
I usually assign a single function to module.exports when it’s the module’s primary feature, like validateEmail. In larger utilities I attach multiple methods: module.exports = { sum, average }. Then const { sum } = require('./math'). That familiarity is a quick pass on node js interview questions about project organization.
16. Compare Express.js with Node.js.
Why you might get asked this:
Candidates sometimes confuse frameworks with runtimes. Clarifying the difference is vital in node js interview questions.
How to answer:
State Node.js is the runtime; Express.js is a minimal web framework built on top. Express abstracts request routing, middleware stacking, and templating, whereas Node.js provides lower-level http APIs.
Example answer:
Using plain Node, I’d parse req.url and write headers manually. Express lets me app.get('/users/:id', handler) and inject middleware like cors with one line. When interviewers ask node js interview questions on this, they want to see I choose the right abstraction level per project.
17. What is event-driven programming?
Why you might get asked this:
Event-driven design underpins Node’s architecture. Interviewers use this node js interview questions topic to confirm conceptual mastery and practical application.
How to answer:
Describe a system that reacts to emitted events rather than sequential procedure calls. In Node, objects inherit from EventEmitter; you register listeners and emit events when state changes.
Example answer:
On a micro-services bus, I emit 'order-created' after persisting to MongoDB. Other services listen and act: billing charges, email sends receipt. Decoupling via events improved scalability, illustrating why event-driven patterns dominate node js interview questions.
18. What does the events module do?
Why you might get asked this:
This core module enables custom events. Interviewers include it in node js interview questions to confirm you can extend EventEmitter and manage listeners efficiently.
How to answer:
Explain that events exports EventEmitter class. You can create an emitter, emit events, attach on/once listeners, and remove them. Mention memory leak warnings after 10 listeners.
Example answer:
I extended EventEmitter in a file-upload class: upload.start emits 'progress' every chunk and 'finish' at completion. Consumers subscribed to update UI. That hands-on usage shows I wield events beyond built-ins, a solid answer for node js interview questions.
19. Explain the Buffer class in Node.js.
Why you might get asked this:
Binary data handling is essential for networking tasks. Interviewers ask this node js interview questions item to see if you can manipulate raw bytes.
How to answer:
Define Buffer as a global class storing fixed-length binary data outside V8 heap. Mention creation methods, encoding options, slicing, and conversion to strings.
Example answer:
While implementing a base64 image handler, I used Buffer.from(data, 'base64') to decode, resized the image, then buffer.toString('base64') for response. Understanding those conversions is often probed in node js interview questions about performance.
20. What is a first-class function in JavaScript?
Why you might get asked this:
Functional features influence callback structures. Interviewers insert this into node js interview questions to confirm language fundamentals.
How to answer:
State that functions are treated like variables: stored in variables, passed as arguments, returned from other functions. This enables higher-order utilities like map or reduce.
Example answer:
I can store const log = msg => console.log(msg), pass log into an array.forEach, or return a function factory from another function. Such flexibility underlies the callback patterns central to node js interview questions.
21. Differentiate asynchronous and synchronous APIs in Node.js.
Why you might get asked this:
Selecting the right API affects responsiveness. Interviewers ask this node js interview questions topic to ensure you avoid blocking production servers.
How to answer:
Point out that fs.readFile is async and accepts a callback, whereas fs.readFileSync blocks until done. Async APIs end with a callback or return a promise. Synchronous versions freeze the event loop.
Example answer:
In a CLI script, I might prefer readFileSync because user interaction is linear. On a web server, readFile must be async; otherwise every request waits. Highlighting that nuance answers node js interview questions effectively.
22. What is the difference between fork() and spawn()?
Why you might get asked this:
Process management matters for scaling. This node js interview questions item verifies you know child_process methods.
How to answer:
Spawn launches a new process executing a command; fork spawns a Node process with IPC channel, sharing code but separate memory. Fork is ideal for worker scripts, spawn for arbitrary binaries.
Example answer:
I fork compute.js to crunch numbers while keeping IPC messaging lightweight. For ffmpeg encoding I spawn the binary with args. Demonstrating correct tool choice satisfies node js interview questions on scalability.
23. How do you manage control flow in asynchronous functions?
Why you might get asked this:
Complex flows can tangle quickly. Interviewers include this node js interview questions area to see if you can coordinate tasks, handle errors, and preserve readability.
How to answer:
Describe using promises, async/await, or libraries like async.series, waterfall, or parallel. Mention try/catch, Promise.allSettled, and abort strategies.
Example answer:
In a PDF generator, I awaited data fetch, template compile, and file write sequentially. For independent calls—currency rates and invoice lookup—I wrapped them in Promise.all and destructured results. Centralizing error handling in one catch kept the code clean, a best practice often evaluated in node js interview questions.
24. What is the purpose of the require() function?
Why you might get asked this:
Module loading is core. This node js interview questions item checks CommonJS literacy.
How to answer:
Require reads a module, wraps it in a function, executes it once, caches the exports, and returns them. It accepts relative or node_modules paths and supports JSON loading.
Example answer:
When I require('./config.json'), Node parses it once, caches the object, and all files share the same reference—handy for configuration. Knowing the caching behavior helps prevent unexpected mutation, something interviewers flag in node js interview questions.
25. List common Node.js frameworks and their uses.
Why you might get asked this:
Framework knowledge reveals ecosystem awareness. Interviewers pose this node js interview questions topic to see if you pick the right tool.
How to answer:
Mention Express for general web apps, Koa for modular middleware, Hapi for configuration-driven APIs, NestJS for TypeScript MVC, Fastify for high-performance HTTP, and Socket.io for real-time communication.
Example answer:
I choose Fastify when latency is critical; its schema-based validation shaved 20 % off p99 in a telemetry service. For enterprise projects I favor NestJS because its decorators mirror Angular, easing onboarding. Express still rules for quick prototypes. Illustrating those trade-offs hits the mark on node js interview questions.
26. How does Node.js handle errors?
Why you might get asked this:
Robust error handling prevents crashes. Interviewers include this node js interview questions item to test strategies like error-first callbacks, try/catch with async, and process events.
How to answer:
Explain error-first pattern (err, data), promise rejections handled with catch or unhandledRejection listener, and uncaughtException for last-resort logging. Stress graceful shutdown.
Example answer:
In an API, every async router is wrapped in a higher-order handler that catches promise rejections and forwards them to Express’s error middleware, returning consistent JSON. For unhandledRejection I log, alert PagerDuty, then exit so Kubernetes restarts the pod. That discipline is a top concern in node js interview questions.
27. What role does NPM play in Node.js projects?
Why you might get asked this:
Dependency management drives project health. This node js interview questions item confirms you can leverage npm CLI.
How to answer:
NPM hosts the package registry, provides CLI commands to install, publish, audit, run scripts, and maintain semantic versioning. It also stores lockfiles for deterministic builds.
Example answer:
I run npm ci in CI to install exact versions, npm audit fix weekly, and npm version minor to bump semver and tag git. Sharing that workflow addresses node js interview questions about supply-chain reliability.
28. Explain what a Node.js process is.
Why you might get asked this:
Process insight affects resource management. Interviewers ask this node js interview questions subject to ensure you know about the single-thread event loop, memory limits, and process APIs.
How to answer:
Describe process as the running instance of Node. It exposes memory usage, env vars, argv, cwd, and emits events exit, uncaughtException. It runs JavaScript code in one thread with libuv threads pool.
Example answer:
Using process.env I inject secrets via Kubernetes, while process.memoryUsage helps detect leaks. I set process.on('SIGTERM') to finish in-flight requests before exit. Presenting such practices nails node js interview questions around operations.
29. Which tools are popular for testing in Node.js?
Why you might get asked this:
Quality assurance is vital. Interviewers include testing topics in node js interview questions to measure your commitment to reliability.
How to answer:
List Jest for unit/integration, Mocha with Chai for flexibility, SuperTest for HTTP assertions, Sinon for spies, and Cypress/Playwright for end-to-end tests.
Example answer:
I prefer Jest because its isolated environment and snapshot testing reduced regressions in a React-Node stack. For REST routes I combine SuperTest with an in-memory Mongo instance. Highlighting that pipeline aligns with node js interview questions about continuous delivery.
30. How does Node.js support clustering?
Why you might get asked this:
Scaling CPU-bound workloads across cores is crucial. Interviewers cap node js interview questions with clustering to assess multi-process strategies.
How to answer:
Explain cluster module: master forks workers equal to CPU cores, shares server ports via round-robin on Linux. Workers communicate via IPC. Highlight graceful worker replacement and sticky sessions caveats.
Example answer:
In production I call cluster.isMaster to fork os.cpus().length workers. Each logs startup and handles requests. On exit, master forks a replacement. This doubled throughput on a CPU-heavy PDF render service. That real gain convinces interviewers during node js interview questions.
Other tips to prepare for a node js interview questions
Schedule timed mock sessions. Verve AI’s Interview Copilot is your smartest prep partner—offering tailored node js interview questions and instant feedback. Start for free at https://vervecopilot.com
Build a small project using at least five core modules; talking through real code impresses panels.
Review event loop diagrams until you can sketch them from memory.
Conduct load tests with autocannon to quote tangible performance metrics.
Want to simulate a real interview? Verve AI lets you rehearse with an AI recruiter 24/7. Try it free today at https://vervecopilot.com
Read official release notes to stay current on LTS features.
You’ve seen the top questions—now practice them live. Verve AI gives you instant coaching based on real company formats. Start free: https://vervecopilot.com
Echoing Thomas Edison’s advice, “Good fortune is what happens when opportunity meets preparation.” Treat each mock as that opportunity.
Keep a failure log; analyzing past bugs enhances storytelling.
Thousands of candidates use Verve AI Interview Copilot to land dream roles. Practice smarter, not harder at https://vervecopilot.com
Frequently Asked Questions
Q: Are node js interview questions mostly theoretical or code-focused?
A: Expect a blend—conceptual questions test understanding of the runtime, while live coding or whiteboard problems assess applied skills.
Q: How deep into the event loop should I study?
A: Know each phase, microtask vs macrotask order, and be ready to debug timing issues; this is a staple among node js interview questions.
Q: Do companies still ask about callback patterns with modern async/await?
A: Yes. Legacy codebases use callbacks, so many node js interview questions ensure you can maintain and refactor that style.
Q: Which version of Node.js should I prepare with?
A: Aim for the current LTS release, as most node js interview questions assume familiarity with its features and deprecations.
