Hard-level LLM and Agentic AI interview questions covering multi-agent systems, production optimization, and advanced architectures. Q1: Design a multi-agent system with agent communication and coordination. Answer: How Multi-Agent Systems Work: Multiple specialized agents collaborate, communicate, and coordinate to …

Hard-level protocol and design interview questions covering advanced distributed systems and protocol design. Q1: Design a custom protocol for real-time multiplayer gaming. Answer: Protocol Design Message Format Header Fields: Magic Number: Protocol identifier Version: Protocol version Flags: Reliable, ordered, …

Hard-level research interview questions covering advanced methodologies and complex analysis. Q1: Explain Bayesian vs. Frequentist approaches to statistics. Answer: Bayes' Theorem: $$P(\theta|D) = \frac{P(D|\theta) \times P(\theta)}{P(D)}$$ When to Use: Frequentist: Large samples, no prior knowledge Bayesian: Small …

Hard-level scalability interview questions covering extreme scale, global distribution, and advanced optimization. Q1: Design a globally distributed database with strong consistency. Answer: Challenge: CAP theorem - can't have all three (Consistency, Availability, Partition tolerance). Two-Phase Commit (2PC): …

Hard-level system design interview questions covering globally distributed, highly scalable systems. Q1: Design WhatsApp/Telegram (Global Messaging). Answer: Requirements 2B users globally Real-time messaging End-to-end encryption Group chats (256 members) Media sharing 99.99% uptime <100ms latency Global …

Hard-level technical due diligence interview questions covering strategic and complex assessments. Q1: How do you assess technical debt and create a remediation roadmap? Answer: Debt Quantification Framework Prioritization Matrix Remediation Roadmap: Assessment Deliverables: Debt inventory with cost estimates Risk …