Programming Exam Platform

01 / THE PROBLEM

Problem & objectives

Create a structured desktop foundation for academic programming examinations, authentication, grading, and authoritative timing.

Secure-by-design WPF foundation for academic programming exams with SQLite persistence, authentication/lockout, dashboards, examinations, audit logs, grading primitives, timer logic, and a fail-closed execution boundary.

02 / THE SYSTEM

Architecture & technology

A WPF/MVVM UI calls application contracts and policies. The domain remains independent of infrastructure; EF Core adapters implement persistence and authentication.

1. WPF / MVVM
2. Application & domain
3. EF Core / SQLite

03 / THE BUILD

Implementation & key features

• Authentication and lockout flows
• Exam dashboards and timer logic
• Grading primitives
• SQLite persistence

04 / THE BOUNDARIES

Security & reliability

Design notes and review considerations documented alongside this project:

• Secure-by-design foundation
• Audit logging
• Fail-closed execution boundary

05 / THE DECISIONS

Challenges & trade-offs

The local code runner is disabled by default and is not a sandbox. Production execution requires a separately isolated service. Instructor authoring and remote sandbox integration remain roadmap items.

06 / THE RESULT

Outcome & engineering takeaways

A working foundation with authentication, role-aware navigation, objective exam delivery, answer persistence, timers, grading primitives, and audit models.

The engineering takeaway is to make the system’s capabilities and limits explicit. The repository documents the implementation and its current scope.