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Lessons (16)

• Indexes, EXPLAIN & Query Plans

  … index lets the database seek to matching rows; EXPLAIN verifies whether the actual query takes that fast path …

• Comments & Formatting

  Good code explains WHAT and HOW by itself; comments should explain WHY. Plus the formatting habits that make …

• The L6 System-Design Thinking Loop

  … It explains what must never break , what peak load changes, and how the system behaves when a dependency …

• Meaningful Names

  … Learn simple rules for naming variables, functions and classes so code explains itself. The big idea A name …

• System Design Interview Framework

  … Keep the first design simple, name what is intentionally deferred, and explain which metric says a trade-off …

• Database Indexing & Transactions

  … users (email); Use EXPLAIN ANALYZE to see what the database actually does: sql EXPLAIN ANALYZE SELECT FROM users …

• What Is Clean Code?

  … subtotal; } What changed? 1. Names explain intent: calc became orderTotal , and a[i].s === 1 became item.inStock …

• DBMS Foundations, Keys & Normalization

  … database-interviews/foundations.svg) Q2, Q3 and Q19: Explain key types Key Interview answer --- --- Superkey Any attributes that …

• Helm, kubectl Cheat Sheet & Best Practices

  … nginx --dry-run=client -o yaml Explain a field kubectl explain deployment.spec.strategy Switch namespace kubectl config …

• What Are Design Patterns?

  … proven solutions with names, so developers can say "let's use an Observer here" instead of explaining 50 …

• Pods

  … shop-api-7d9f-xk2p events at the bottom explain most problems! kubectl logs shop-api-7d9f-xk2p container …

• Behavioral Patterns I: Observer, Strategy, Command, State

  The four behavioral patterns you'll use most, explained with everyday analogies, diagrams and practical JavaScript. Why behavioral …

• CQRS & Event Sourcing

  … Powerful patterns, explained simply, with honest trade-offs. Part 1: CQRS The big idea A restaurant kitchen and …

• Frontend Security

  XSS, CSRF, clickjacking, token storage, CORS and supply-chain risks, explained with pictures. What can go wrong in …

• Normalization & Denormalization

  … They explain exactly why a column belongs somewhere else. First Normal Form (1NF): atomic values, no repeating groups …

• Clean Architecture in Depth

  Uncle Bob's four circles explained properly. Entities, use cases, input and output ports, presenters, crossing boundaries with …