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 * …

Comprehensive comparison of SQL and NoSQL databases to help choose the right database for your use case. Decision Tree Feature Comparison Feature SQL NoSQL Schema Fixed, predefined Flexible, dynamic Scalability Vertical (scale up) Horizontal (scale out) Transactions ACID guaranteed Eventually consistent (usually) Joins …