Design Inventory Management Infrastructure for IoT devices
Last updated: January 29, 2026
Quick Overview
Design a fault-tolerant inventory management system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
Zoom
January 29, 202639
12
734 solved
Design a fault-tolerant inventory management system that handles millions of requests. Discuss trade-offs in consistency, availability, and performance.
This is a common system design question asked during System Design Round at Zoom. The interviewer expects you to demonstrate your ability to design large-scale distributed systems, make well-reasoned trade-offs, and communicate your thought process clearly. Zoom values engineers who can think about scalability from day one.
What the Interviewer Expects
- Drive the design discussion proactively with minimal interviewer guidance
- Perform detailed capacity estimation and use it to inform design decisions
- Design for global scale with multi-region deployment and data consistency
- Deep dive into 2-3 critical components with implementation-level detail
- Address complex trade-offs: CAP theorem, eventual consistency, conflict resolution
- Discuss operational excellence: deployment strategy, chaos engineering, SLOs/SLIs
- Propose a phased rollout plan from MVP to full-scale system
Key Topics to Cover
How to Approach This
- Start by clarifying functional and non-functional requirements with the interviewer.
- Estimate the scale: QPS, storage, bandwidth. This drives your design decisions.
- Draw a high-level architecture first, then deep dive into 1-2 critical components.
- Discuss trade-offs explicitly (e.g., consistency vs availability, SQL vs NoSQL).
- Address failure scenarios, monitoring, and how the system handles 10x traffic spikes.
Possible Follow-up Questions
- How would you optimize costs as the system scales?
- How would you migrate from a monolithic to a microservices architecture?
- What would the deployment pipeline look like for this system?
- How would you handle a 10x increase in traffic overnight?
Practice a Similar Problem on Codemia
Solve a related problem with our interactive workspace, get AI feedback, and view detailed solutions.
Solve on CodemiaSample Answer
Requirements
Functional Requirements
- Device Registration: Allow IoT devices to register and authenticate securely.
- Inventory Tracking: Real-time tracking of IoT device inventory across multiple r...
Capacity Estimation
Assuming we have:
- 10 million IoT devices with an average of 100 requests per device per day.
- Peak traffic of 2 requests per second per device during busy hours (e.g., device status upd...
Submit Your Answer
