Online Exam / Assessment (Next.js, PostgreSQL, Redis, Docker, TypeScript) overview

A secure online examination platform supporting timed assessments, auto-grading, and proctoring integration for educational institutions and certification bodies. Next.js delivers the exam interface with server-side session validation to prevent answer tampering and client-side timers with server reconciliation. PostgreSQL stores question banks, exam configurations, student responses, and grading rubrics with row-level security per institution. Redis manages exam session state, countdown timers, and rate limiting for submission endpoints. Docker containers isolate code execution sandboxes for programming assessments. WebSocket connections via Socket.IO enable real-time proctor monitoring dashboards. The tradeoff is preventing exam fraud across diverse client environments and scaling concurrent exam sessions during peak periods.