Node.js
Practice runtime fundamentals, async flows, and backend scenarios typical of Node interviews.
Log in to startAI-powered · Role-based practice
Free mock interviews for developers
Practice mock interviews for Node, React, System Design, and more— structured like real screens so you build confidence before the real thing.
Prefer reading first? Explore technical interview questions by topic, then come back here to practice aloud.
Choose your interview role
Each card opens a focused mock interview session for that track. You'll be asked to sign in first so we can securely launch your session.
React
Drill hooks, rendering, performance, and frontend architecture questions at interview pace.
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Cover language internals, data structures, and patterns common in Python-heavy roles.
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Talk through CI/CD, infra, observability, and reliability like a real DevOps screen.
Log in to startSystem Design
Design scalable systems under time pressure—APIs, storage, trade-offs, and diagrams.
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Sharpen query modeling, indexing, and database reasoning with interviewer-style follow-ups.
Log in to startJava
Practice JVM concepts, concurrency, and enterprise patterns asked in Java interviews.
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Walk through modeling choices, evaluation, and ML systems questions clearly and confidently.
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Structure answers for product sense, prioritization, and stakeholder-style prompts.
Log in to startBehavioral
Refine STAR-style stories for leadership, conflict, and collaboration behavioral rounds.
Log in to startFrequently asked questions
- Are these mock interviews really free?
- Yes. Choosing a role below is free for logged-in users; we link you to Zavnia’s mock interview experience using your session token so you can practice without extra signup steps.
- Do I need an account to start?
- You need to sign in so we can securely pass your auth token to the mock interview app. If you’re not logged in, you’ll be redirected to the login page first.
- How do mock interviews relate to your interview question guides?
- Use our topic guides to study, then run a mock interview for the same stack—links are on each role card so you can prep and practice in one flow.
- What roles are supported?
- We cover Node.js, React, Python, DevOps, System Design, SQL, Java, ML/AI, Product, and Behavioral sessions—each tuned to common interviewer prompts.