Draw state diagrams for: (i) Online Banking System (ii) Online Examination System [MCS-219, Q4]

(i) State Diagram – Online Banking System

Assumption: The diagram represents the user/account session.

[Start]
   |
   v
Logged Out
   |
   | Login (Valid Credentials)
   v
Logged In
   |
   | Select Operation
   v
Transaction Selection
   |        |         |
   |        |         |
View Balance  Fund Transfer  Bill Payment
   |        |         |
   |        |         |
   ---------|---------|
            |
            v
        Transaction Processing
            |
            | Success
            v
      Transaction Completed
            |
            | Logout
            v
        Logged Out
            |
            v
          [End]

Exceptional States:

• Invalid Login → back to Logged Out
• Transaction Failure → back to Transaction Selection
• Session Timeout → Logged Out

(ii) State Diagram – Online Examination System

Assumption: The diagram represents the student exam session.

[Start]
   |
   v
Not Logged In
   |
   | Login (Valid Credentials)
   v
Logged In
   |
   | Exam Available
   v
Exam Instructions
   |
   | Start Exam
   v
Exam In Progress
   |
   | Answer Questions
   |
   |----------------------|
   |                      |
   v                      v
Pause Exam           Time Expired
   |                      |
   | Resume               |
   v                      |
Exam In Progress          |
   |                      |
   | Submit Exam          |
   v                      v
Exam Submitted --------> Auto Submit
           |
           | Evaluation
           v
        Result Generated
           |
           | Logout
           v
        Logged Out
           |
           v
         [End]

Exceptional States :

• Invalid Login → Not Logged In
• Network Failure → Paused Exam
• Malpractice Detected → Exam Terminated