Design of a Computer-Based Test (CBT) System for ND Examinations in Enugu State Polytechnics

The conduct of examinations in Nigerian polytechnics has continued to face challenges including examination malpractice, logistical inefficiencies, and high administrative costs associated with paper-based testing. The global shift toward computer-based testing has demonstrated measurable improvements in examination integrity and result accuracy, yet adoption remains slow among state polytechnics in Nigeria. This study designed a computer-based test (CBT) system specifically adapted for National Diploma (ND) level examinations in Enugu State polytechnics, with IMT Enugu as the primary case institution. A waterfall system development methodology was employed, and the system was implemented using JavaScript, PHP, and MySQL, with a responsive interface accessible on both desktop and tablet devices. The system incorporated randomised question shuffling, automated timing, instant scoring, and a secure login module to minimise examination fraud. Simulated test sessions involving volunteer participants demonstrated that the system maintained stability under concurrent user loads of up to 100 examinees and produced accurate, real-time score reports. Administrative modules allowed lecturers to upload question banks, set examination parameters, and access result analytics post-examination. The study concluded that the designed CBT system is technically feasible and contextually appropriate for deployment in Enugu State polytechnics, offering a cost-effective alternative to paper examinations. Wider adoption is recommended pending institutional investment in computer laboratory infrastructure.

Keywords: CBT system, ND examinations, examination integrity, polytechnic education, Enugu State