Support Center

Got Questions?
We Have Answers.

Everything you need to know about StackInterview and how to get the most out of your interview preparation.

What is StackInterview?

StackInterview is a free, structured interview preparation platform built for full-stack developers at every stage. It offers 1,000+ curated technical questions across JavaScript, React, Node.js, Next.js, TypeScript, MongoDB, SQL, and system design - along with explanations designed to build deep conceptual understanding, not surface memorisation. Whether you are preparing for your first developer role or a senior engineering position, the platform gives you the same structured, depth-first approach that real interviews demand.

What technologies are covered?

The platform currently covers: JavaScript (closures, prototype chains, event loop, async/await, ES2024 features), React (hooks, rendering behaviour, server components, performance optimisation), Node.js (event-driven architecture, streams, cluster, Express middleware), Next.js (App Router, SSR vs SSG, server actions, data fetching patterns), TypeScript (generics, type narrowing, decorators, strict configurations), MongoDB (schema design, aggregation, indexes, transactions), SQL (joins, window functions, indexing, query optimisation), and System Design (load balancing, caching, microservices, message queues, CAP theorem).

Are these real interview questions?

Yes. Every question in StackInterview's bank has been curated from real technical hiring rounds at companies including Google, Meta, Stripe, Airbnb, Atlassian, and many mid-to-large technology companies. Questions are reviewed by engineers who have conducted interviews at these organisations to ensure they reflect genuine hiring standards.

What are Company Interview Tracks?

Company Interview Tracks simulate the interview format of specific technology companies. Instead of browsing random questions, you follow a structured sequence that mirrors a real interview: multiple rounds, increasing difficulty, a mix of technical domains. It is the closest simulation of a real interview you can get without scheduling one.

What are Interview Guides and Articles?

Interview Guides are long-form editorial articles covering interview strategy, technology deep-dives, and preparation frameworks. They are designed to give you the conceptual context you need to not just answer questions but understand and articulate the reasoning behind your answers - which is what turns any developer, at any level, into a strong interview candidate.

Is StackInterview beginner friendly?

Yes - StackInterview is designed to work for developers at all experience levels. Questions start at a foundational level: variable scoping, basic hooks, simple SQL queries. They progressively move toward senior-level depth: event loop internals, server component rendering, distributed system design. If you are just starting out, you can use the platform to learn how these concepts work while also seeing what interviews look for - which shows you exactly what to build toward. You do not need years of experience to start.

How often are questions updated?

The question bank is updated continuously. We monitor changes in hiring patterns, technology updates, and community feedback to keep questions current. Major technology updates - such as React 19 features or Node.js v22 APIs - are incorporated as they become relevant to interview rounds.

Can I filter questions by technology or difficulty?

Yes. You can filter questions by technology track, difficulty level (junior / mid / senior), and question type (conceptual / code-based / architecture). You can also browse the full Question Library or use the Surprise Challenge feature for a randomised cross-technology sequence.

Is StackInterview free?

Yes, completely. StackInterview is free for all developers with no account required to access questions. We believe quality interview preparation should be accessible to everyone, regardless of whether they can afford expensive bootcamps or subscription platforms.

How is StackInterview different from LeetCode?

LeetCode focuses primarily on algorithmic problem-solving (data structures, dynamic programming, graph algorithms). StackInterview focuses on full-stack engineering knowledge - React architecture, Node.js internals, database design, and system design - which is equally important for senior engineering roles but largely absent from algorithmic platforms. The two platforms complement each other: use LeetCode for algorithmic prep and StackInterview for everything else.

Still have a question?

If you didn't find the answer you were looking for, reach out to us directly.

Contact UsStart Practicing