System Design Quiz — Scalability, CAP Theorem & Architecture
System design is the defining skill for senior and staff engineering roles. It covers distributed systems, scalability trade-offs, caching, message queues, and reliability patterns.
Every senior backend and full-stack interview includes a system design round. A verified score signals you can make architectural decisions — not just write code.
Sample Questions
3 of 10Q1.What does the CAP theorem state?
Q2.What is the main benefit of using a message queue (e.g. Kafka, RabbitMQ) between services?
Q3.What is the difference between horizontal and vertical scaling?
Answer all 3 questions to see your score
Get your verified System Design score
Take the full 10-question quiz. Your score gets added to your developer resume as a verified skill badge — proof that you actually know System Design.
How verified skills work
Take the System Design quiz
10 adaptive questions covering real-world scenarios, not just syntax recall.
Your score is recorded
Skeelzy tracks your accuracy per skill over time — multiple attempts improve your verified score.
Add it to your resume
Your System Design accuracy appears as a verified badge on your public Skeelzy resume — proof for recruiters.