Scalability Basics — Study Resources & PYQs

Curated resources, past papers and PYQs for Scalability Basics.

Study resources

System Design BASICS: Horizontal vs. Vertical Scaling (Video) — Gaurav Sen's widely-watched explanation of scaling up vs scaling out.
Scalability (Article) — The System Design Primer's dedicated section on horizontal vs vertical scaling.
The Twelve-Factor App (Article) — The canonical methodology for building deployable, scalable, production-ready web applications.