Computer-Based Testing (CBT) System for The Loctech Enugu 2025 Scholarship

Overview

The Loctech Enugu Scholarship required a reliable CBT platform capable of handling high candidate volume while enforcing strict examination rules. Existing solutions were either costly or lacked the level of control needed for a scholarship examination.

I designed and implemented a custom CBT system that delivers a smooth testing experience for candidates while giving administrators full control over exam creation, monitoring, and evaluation.

System Architecture

1. Admin Application
2. Question and exam management
3. Candidate management
4. Result monitoring and exports
5. Exam configuration (duration, rules, availability)
6. Client Application
7. Candidate login and verification
8. Secure test interface
9. Real-time timer and auto-submission
10. Instant feedback on test completion (where applicable)
11. Server
12. Express.js backend API
13. MongoDB database for exams, candidates, responses, and logs
14. Central authority for validation and enforcement

Core Features

Exam Security & Integrity

1. Tab-switch restriction detection
2. Fullscreen enforcement
3. Automatic warnings and penalties on rule violation
4. Real-time countdown timer with server validation
5. Auto-submit on time expiration

Exam Management

1. Flexible question types
2. Randomized questions per candidate
3. Configurable scoring and grading logic

Candidate Experience

1. Clean, distraction-free UI
2. Seamless navigation between questions
3. Progress indicators and remaining time display

Administration & Monitoring

1. Live candidate activity tracking
2. Centralized result management
3. Exportable reports for evaluation and record-keeping

Technology Stack

1. Backend
2. Express.js
3. MongoDB
4. RESTful API architecture
5. Secure session and exam state handling
6. Frontend
7. React (Admin & Client interfaces)
8. Role-specific UI flows
9. Responsive design for various devices

Performance & Reliability

1. Optimized API endpoints for concurrent test-takers
2. Stateless backend with secure session validation
3. Resilient exam state management to handle network interruptions

Impact

1. Successfully delivered a secure CBT platform for a real-world scholarship examination
2. Reduced examination malpractice through enforced client-side restrictions
3. Enabled scalable testing for hundreds of candidates
4. Provided administrators with clear, auditable exam data

Why This Project Matters

This project demonstrates:

1. Experience building high-stakes, security-focused systems
2. Strong understanding of client-server trust boundaries
3. Ability to design systems that balance UX and strict control
4. Practical knowledge of exam technology and enforcement logic