Mid-Level Backend Interview Pack | 150 Questions

This pack contains 150 intermediate backend interview questions tailored for developers with 2–5 years of experience. Topics include:

• Advanced API design (RESTful best practices, GraphQL, versioning)
• Database internals (indexing strategies, query optimization, transaction isolation)
• Distributed systems (consistency models, CAP theorem, message queues)
• Security (OAuth2, JWT, rate limiting, secure coding)
• Performance & scalability (caching patterns, load balancing, monitoring)
• System design fundamentals (high‑level architecture for common scenarios)

Each question includes a detailed answer with real‑world context, code snippets (Java), and trade‑off analysis.

Format: downloadable PDF with bonus architecture cheat sheet.