Frequently Asked Questions
Everything you need to know about preparing for your system design interview.
Getting Started
How does EngMock.ai work?
EngMock.ai simulates a real system design interview. You choose a scenario, discuss requirements with our AI interviewer via voice, draw your architecture on an interactive whiteboard, and receive instant detailed feedback based on Big Tech interview standards.
Do I need any special equipment?
You just need a computer with a microphone and a modern web browser (Chrome, Firefox, Safari, or Edge). No downloads or installations required.
How long does an interview take?
Most interviews take 30-60 minutes depending on the scenario complexity and your depth of discussion. You can end the interview at any time.
Interview Process
What scenarios are available?
We offer 20+ real system design scenarios including Twitter, URL Shortener, Chat Application, Video Streaming, Rate Limiter, and more. New scenarios are added regularly.
Can I practice the same scenario multiple times?
Absolutely! We encourage practicing scenarios multiple times to improve. Each session is saved so you can track your progress.
How does the AI interviewer work?
Our AI interviewer uses advanced language models to conduct realistic interviews. It asks follow-up questions, challenges your assumptions, and guides you through the design process just like a real interviewer.
Scoring & Feedback
How is my interview scored?
We evaluate you across 4 dimensions: Communication, System Design, Problem Solving, and Knowledge Depth. Each dimension is scored 0-10 based on Big Tech interview rubrics.
What level will I be evaluated at?
Based on your performance, you'll be classified as Junior, Mid, Senior, or Staff level. The evaluation considers both breadth (steps completed) and depth (quality of thinking).
Can I see my progress over time?
Yes! Pro users get access to advanced analytics showing score trends, skill improvements, and detailed comparisons across sessions.
Technical Requirements
What browsers are supported?
EngMock.ai works best on Chrome, Firefox, Safari, and Edge (latest versions). We recommend Chrome for the best experience.
Do you support mobile devices?
Currently, EngMock.ai is optimized for desktop/laptop use due to the interactive whiteboard. Mobile support is coming soon.
Is my data secure?
Yes! All interviews are encrypted and stored securely. We never share your data with third parties. See our Privacy Policy for details.
Billing & Subscription
How does the free plan work?
The free plan includes 3 interviews per month with basic feedback. Perfect for trying out the platform or occasional practice.
Can I upgrade or downgrade anytime?
Yes! You can change your plan at any time. Upgrades take effect immediately, while downgrades take effect at the end of your billing cycle.
Do you offer refunds?
We offer a 7-day money-back guarantee for Pro subscriptions. If you're not satisfied, contact us for a full refund.
Still have questions?
We're here to help! Reach out to our support team and we'll get back to you shortly.
Contact Support