Consensus algorithm comparison and general implementation interview questions. Q1: Compare different consensus algorithms. Answer: Comparison Table: Algorithm Type Finality Block Time Energy Fault Tolerance Paxos Classic Immediate N/A Low (n-1)/2 failures BFT Byzantine Immediate Fast Low f Byzantine (n=3f+1) Tendermint …

Radar charts (spider charts) compare multiple variables across different categories. Perfect for skill assessments, performance reviews, and multi-dimensional comparisons. Use Case Use radar charts when you need to: Compare multiple dimensions Show skill profiles Visualize performance metrics Display multi-attribute …

Database performance issues, solutions, and SQL vs NoSQL comparison. Common Performance Issues 1. Missing Indexes 1-- ❌ Problem: Full table scan 2SELECT * FROM users WHERE email = 'test@example.com'; 3 4-- ✅ Solution: Add index 5CREATE INDEX idx_email ON users(email); 6 7-- Verify index usage 8EXPLAIN SELECT * FROM …

Comprehensive comparison of SQL and NoSQL databases to help choose the right database for your use case. Decision Tree graph TD A[Choose Database] --> B{Data Structure?} B -->|Structured, Related| C[SQL] B -->|Flexible, Document| D[NoSQL Document] B -->|Graph Relationships| E[NoSQL Graph] B -->|Key-Value| F[NoSQL KV] C …