A company wants to offer online Java Programmer certificates and

earn profit from this. They want to develop a browser$-$based Java

training system to help users prepare for certification exams $($system

boundary$).$

In the system, a user shall request an exam from system database.

The system database is a sub$-$system. Additionally, the user shall edit

their proftle on the database whenever they want to$.$

There are two other users of the system : a tutor and a moderator. The

tutors shall add and modify exams in the system database. The

moderator shall certlly the exams to make sure that they are not too

trivial or too obvious.

Based on the given scenario above, Draw a use case diagram. Since

there are no real stake holders here, you are free to fill in details you

think is essential.