Caching Strategies course syllabus
Follow the lessons in order — each one builds on the last. Tick them off as you go.
- Caching Introduction: Why, Where & What to Cache What caching is, the layers of caching in a web system, hit ratio, TTLs, and how to decide what is worth caching. 3 min
- Cache-Aside, Read-Through, Write-Through & Write-Behind The four core caching patterns compared, with Python examples and a decision table for when to use each. 5 min
- Cache Invalidation & Cache Stampedes Why cache invalidation is hard, TTL vs event-based invalidation, and how to prevent thundering-herd cache stampedes. 4 min
- HTTP Caching, ETags & CDNs Cache-Control, ETag and Last-Modified headers, conditional requests, and how CDNs cache content at the edge. 4 min
- Build an LRU Cache from Scratch Implement a least-recently-used cache with O(1) get and put using a hash map and doubly linked list — a classic interview question. 4 min
- Caching Interview Questions Frequently asked caching interview questions on patterns, invalidation, eviction policies, Redis and CDNs, with clear answers. 3 min
Caching Strategies FAQ
Is this Caching Strategies tutorial free?
Yes. All 6 Caching Strategies lessons are free to read online with no sign-up. Each one includes working code examples you can copy and run.
Is Caching Strategies good for beginners?
Yes. The tutorial starts with "Caching Introduction: Why, Where & What to Cache" and builds up one concept at a time, so you don't need any prior Caching Strategies experience — just follow the lessons in order.
How long does it take to learn Caching Strategies?
Reading all 6 lessons takes about 1 hour. Most learners need a few weeks of hands-on practice alongside the lessons to feel confident using Caching Strategies on real projects.
What should I learn after Caching Strategies?
Good next topics are AJAX, Backend Security, Event-Driven Architecture, GraphQL. The Backend Developer Roadmap shows the full order.