Practice real HLD and LLD questions
Work through interview-style design prompts and build the habit of structured thinking.
AI-powered system design practice
Practice System Design Interviews with AI Feedback
Solve HLD and LLD interview questions, submit your design approach, and get score-based AI feedback that helps you improve fast. The best way to prepare for system design rounds at top tech companies.
Question types
HLD + LLD
Scoring
Out of 100
Free limit
2 / week
Why use DesignPrep for system design practice
Get AI-based scoring and feedback
Receive a score, strengths, weaknesses, and missed points instead of generic comments.
Track progress over time
See how your answers improve across architecture, trade-offs, scalability, and design clarity.
Frequently asked questions
Everything you need to know about practicing system design with DesignPrep.
- What is DesignPrep?
- DesignPrep is an AI-powered platform for practicing system design interview questions. You submit written answers to HLD and LLD questions and receive structured feedback with a score out of 100.
- What types of system design questions are available?
- DesignPrep covers both High-Level Design (HLD) and Low-Level Design (LLD) questions — the two main categories tested in software engineering interviews at top tech companies.
- How does the AI feedback work?
- After you submit your answer, our AI evaluates it across multiple dimensions including architecture, trade-offs, scalability, and design clarity. You receive a score, a list of strengths, and specific improvement points.
- How many submissions can I make per week?
- Free users can make 2 submissions per week. Paid plans offer more submissions and access to premium questions.
Ready to ace your system design interview?
Join engineers preparing for HLD and LLD rounds at top tech companies. Start free, get real feedback, and track your progress.
Get started for free