Most Popular Interview Type

System Design Mock Interview

Practice designing scalable distributed systems with AI interviewer. Master HLD concepts like database design, caching, load balancing, and microservices.

Popular System Design Questions

Practice with real interview questions asked at FAANG companies

Design URL Shortener

Easy

Design TinyURL/bit.ly

Design Rate Limiter

Medium

API rate limiting system

Design Instagram

Medium

Photo sharing platform

Design WhatsApp

Hard

Real-time messaging

Design Netflix

Hard

Video streaming platform

Design Uber

Hard

Ride-sharing system

Key Concepts You'll Practice

Database Design

SQL vs NoSQL, sharding, replication, partitioning strategies

Scalability

Horizontal scaling, load balancing, caching layers

Distributed Systems

CAP theorem, consistency models, consensus algorithms

API Design

REST, GraphQL, rate limiting, authentication

System Design Interview Structure

1

Requirements

5-10 min

Clarify functional and non-functional requirements

2

High-Level Design

15-20 min

Draw system architecture, identify components

3

Deep Dive

15-20 min

Discuss specific components in detail

4

Scaling & Trade-offs

5-10 min

Handle scale, discuss bottlenecks and alternatives

Frequently Asked Questions

What system design questions are available?

We offer 20+ questions including URL Shortener, Rate Limiter, Instagram, WhatsApp, Netflix, Uber, Payment System, and more.

How is my system design evaluated?

The AI evaluates requirements gathering, architecture quality, component design, scalability considerations, and trade-off discussions.

What level is this for?

System design interviews are typically for senior engineers (3+ years). However, practicing early helps build strong foundations.

Master System Design Interviews

Practice with AI and get detailed feedback on your architectural decisions.