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Lessons (13)

• Views, Triggers & Stored Procedures

  Interview answers for views, materialized views, triggers and stored procedures. Covers PDF questions 20, 24 and 27-30 …

• Transactions, Indexes & Concurrency

  Interview answers for triggers, ACID, clustered indexes, deadlock/livelock and RAID. Covers PDF questions 8-11 and 18 …

• Serverless Architecture

  … Functions as a Service, event triggers, cold starts, pay-per-use pricing, managed backends, and the patterns and …

• Releases, Observability and Production Safety

  … immutable artifacts, reversible migrations and a measured rollback trigger. Correlate logs, metrics and traces with request IDs; alert …

• Debug Latency Like an Investigator

  … Restart helps briefly Warm cache, leak, churn, periodic trigger. Safe response sequence 1. Record window, route/tenant/region …

• How Browsers Render a Page

  … Use defer or async . - Changing geometry triggers expensive layout; transform and opacity are cheap. - Batch DOM reads and …

• React Hooks in Practice

  … a box that doesn't trigger renders jsx function SearchBox() { const inputRef = useRef(null); // 1. reference a DOM …

• REST vs GraphQL vs gRPC

  … problem: listing 50 users and their posts can trigger 1 query for users + 50 queries for posts. Fix …

• ConfigMaps, Secrets & Storage

  … put a hash of the config in a pod annotation, so changing the config triggers a rolling restart …

• DSA Interview Patterns Cheat Sheet

  … Keyword triggers, a decision flowchart, complexity tables and a step-by-step interview routine. The big idea There …

• Scaling & Health Probes

  … scale consumers on Kafka lag triggers: - type: kafka metadata: bootstrapServers: kafka:9092 consumerGroup: email-service topic: shop.orders …

• Choosing an Architecture

  … customer rules Contract design and stability Serverless Functions triggered by events, managed services Spiky workloads, event processing, zero …

• Data in Microservices: Sagas & the Outbox Pattern

  … Each one updates a single service's database and triggers the next step. If a step fails, the …