Interview Prep

287 Questions & Answers, in 7 parts, increasing in difficulty

How to use this: Go through each part top to bottom, then move to the next, questions get harder as you go. Each part numbers its own questions from 1, so “Q9” means question 9 of whichever part you’re in, not a running count across all 287. Don’t just read the answers; say them out loud or write them on a whiteboard. For the system design sections, practice drawing the diagram before checking the answer, several are rendered as Mermaid diagrams.

Parts

• Part 1 — Go Language — Q1–89. Fundamentals, types & generics, concurrency, memory/GC, error handling, performance, testing, web & networking, and common pitfalls & gotchas.
• Part 2 — Coding Patterns — Q1–23. The 23 recurring patterns behind most coding-interview questions: sliding window, two pointers, tree BFS/DFS, backtracking, topological sort, grid BFS, knapsack, tries, and more.
• Part 3 — Databases & SQL — Q1–32. Database optimization, window functions, CTEs, join algorithms, partitioning, JSON querying, storage/concurrency internals, and zero-downtime schema migrations.
• Part 4 — System Design & Distributed Systems — Q1–40. System design fundamentals, SQL vs. NoSQL, distributed systems concepts, and system design case studies.
• Part 5 — Kafka & Microservices — Q1–41. Kafka in depth for Go, microservices architecture, DDD, CQRS, event sourcing, and event-driven patterns.
• Part 6 — Security & Cloud — Q1–26. Security fundamentals, cloud & infrastructure.
• Part 7 — AI Engineering — Q1–36. LLM fundamentals, prompting and context engineering, RAG and retrieval systems, and agentic production AI: tool use, MCP, evaluation, and guardrails.