Online Examination System - High Level Design

Student: Sambhav Mahajan UID: 23BCS11290 Subject: System Design

User Management<hr/>UserAuthService (SRP: Auth Only)

Exam Management<hr/>ExamScheduler QuestionBank

«Interface» Question (OCP)

«Interface» EvaluationStrategy

Result Module<hr/>ResultGenerator ResultPublisher

«Interface» NotificationService

SRP Application: - Each module has one specific responsibility (Auth, Exam, Eval, etc.) - Changes in one module don't impact others.

OCP Application: - New Question types or Notification methods can be added without modifying the core logic via interfaces.

UML Class Diagram: Online Exam System

UserAuthService<hr/>- users: List&lt;User&gt; - activeSessions: Map<hr/>+ authenticate(u, p): bool + getRole(user): Role + validateToken(t): bool

ExamManager<hr/>- currentExams: List - questionBank: Bank<hr/>+ createExam(Exam): void + addQuestion(Question): void + schedule(DateTime): void

«interface» Question<hr/>+ getPoints(): int + validate(ans): bool

MCQQuestion<hr/>+ validate(ans): bool

TrueFalseQuestion<hr/>+ validate(ans): bool

«interface» EvaluationStrategy<hr/>+ calculate(submission): int

AutoEvaluation<hr/>+ calculate(sub): int

ResultGenerator<hr/>- results: List&lt;Result&gt;<hr/>+ computeFinalScore(): void + generatePDF(): File + publish(): void

«interface» NotificationService<hr/>+ send(User, msg): void

EmailNotification<hr/>+ send(User, msg): void

Ass