Step1)在題目點選「提交解答」，驅動網址「problem/a0000/submit」，查詢online-judge/dmoj/urls.py的第120行，對應到程式「problem.ProblemSubmit.as_view」
Step2)呼叫online-judge/judge/views/problem.py內的ProblemSubmit，使用self.new_submission.judge(force_judge=True, judge_id=form.cleaned_data['judge'])，new_submission是ProblemSubmitForm儲存後的回傳物件，是models的Submission物件，由step3得知，所以self.new_submission.judge呼叫Submission的judge，用於傳送程式給bridge，bridge再傳送給評判主機。
Step3)ProblemSubmitForm定義在online-judge/forms.py，對應的model為Submission
Step4)在online-judge/judge/models/submission.py的類別Submission，定義judge函式呼叫judge_submission，定義在online-judge/judge/judgeapi.py
Step5)在online-judge/judge/judgeapi.py找到judge_submission，最後呼叫同檔案上方的judge_request，judge_request將解題程式碼送給Bridge。
Step6)DMOJ的bridge使用「python3 manage.py runbridged」，runbridged定義在套件judge，online-judge/judge/management/commands/runbridged.py，呼叫judge_daemon啟動bridge
Step7)在dmoj/online-judge/judge/bridge/daemon.py定義judge_daemon