ZeroDay Dev vs AI Engineer Quiz

Learn to break things—before attackers do. ZeroDay Dev teaches secure coding and blockchain security through 4,000+ hands-on challenges. Learn from 120+ real-world exploits: Beanstalk, Indexed Finance, bZx, VeilCash, Sigma.Money, Bybit, and more. Each exploit is linked to verified incident records so you learn from actual on-chain events, not hypotheticals. Practice — Build exploit intuition without reading docs. Tap vulnerable lines, drag tokens into code, get instant feedback. Filter by domain (Exploits, Solidity, Rust, DeFi, Solana) or difficulty. Exercises — Full code challenges with reference solutions. Deeper dives when you're ready. Exam — Prepare for real security assessments. Timed tests across domains with performance tracking. Memory-match decks for opcodes, EIPs, and security terms. Deep Dive Hub — Curated learning tracks for Web2, Web3, Rust, ZK Proofs, and Trading. Recommended tracks driven by your weak areas. Build your own from bookmarks or missed questions. Streaks & XP — Stay consistent and level up. Daily streaks, badges, and progression keep you coming back. Offline-first — Learn on the subway, no Wi‑Fi needed. All content lives on your device. No account required—start immediately. Covers reentrancy, oracle manipulation, flash loans, proxy races, ZK trusted setup, and more. Rust, Solidity, DeFi, Solana & cybersecurity.

AI Engineer Quiz helps software engineers and tech professionals continuously sharpen their knowledge with bite-sized quizzes that span 21 categories. ■ FEATURES - 1,500+ curated questions covering modern software engineering - 21 categories: backend, frontend, networking, security, databases, AI/ML, DevOps, architecture design, domain modeling, requirements engineering, communication, and more - Three difficulty levels: easy / medium / hard - Detailed explanations for every question with references to wrong-answer reasoning - Built-in glossary of 500+ technical terms - XP, levels, streaks, and rankings to keep you motivated - Favorites and history to revisit important questions - Daily limit of 30 questions in free tier (one-time unlock available) ■ DESIGNED FOR THE AI ERA We focus on concepts that AI cannot replace easily: - Architecture decisions and trade-offs - Domain modeling and bounded contexts - Requirements engineering and stakeholder communication - Cross-cutting concerns: security, observability, distributed systems ■ START FREE — 30 QUESTIONS/DAY Use it free with a 30-question daily limit. One-time unlock removes the limit and unlocks the Favorites feature (no subscription, no monthly fee). ■ PRIVACY We do not collect your name, phone number, or credit card. Sign in with Apple is supported with email-relay. See our privacy policy for details. We continuously expand the question set. Feedback and category requests are welcome!