🎓 Student Projects (College Reports) · Sequence
Online Examination System Sequence Diagram (Take an Exam)
A student taking an online exam: start, auto-save, submit and grading.
Drawing diagram…
What this diagram shows
- Auto-save loop while answering
- Time-out handled with an alt branch
- Grading after submission
Prompt used
Sequence diagram for taking an online exam: the student starts the exam in the browser; the exam server checks the schedule and creates an attempt; questions load; answers auto-save every 30 seconds; the student submits, or the server submits automatically when time runs out; the grader scores objective questions and stores the result.
Mermaid code
sequenceDiagram
actor S as Student
participant B as Browser
participant X as Exam Server
participant G as Grader
participant DB as Database
S->>B: Start exam
B->>X: Request exam paper
X->>DB: Check schedule and create attempt
DB-->>X: Attempt created
X-->>B: Questions
loop Every 30 seconds
B->>X: Auto-save answers
X->>DB: Save answers
end
alt Student submits
S->>B: Submit
B->>X: Final answers
else Time runs out
X->>X: Submit automatically
end
X->>G: Grade attempt
G->>DB: Store score and result
G-->>X: Result
X-->>B: Submission confirmedRelated templates
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