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Scaling Online CBT Examination Engines: Anti-Cheat Safeguards & Concurrency Management
Civil service examinations require rigorous, timed simulation. If an online testing portal lags or loses an aspirant's answers due to a fleeting network drop, the exam experience is ruined. In this article, we explain how TheWebVale engineered the computer-based testing (CBT) engine for Pratibha Classes.
🛡️ Anti-Cheat & Offline Resilience
Answers are synced locally in encrypted IndexedDB after every click, while client-side tab-switch detectors trigger automatic warnings if an aspirant navigates away from the exam viewport.
1. Concurrency Management on Exam Finish
When 1,000+ students submit their test simultaneously at the 120-minute timer mark, asynchronous worker queues calculate negative marking, section cut-offs, and state-wide percentile ranks within seconds.