I am bit confused with some implementation,Here is the my problem,

1. Two users can login to the system.(User A,B)
2. They login same time with different user names and passwords

We assume, `Employee` class has a `static` variable call `age`

User A change the age value to 45, after that user B change the age value to 28, then both save the changes.

so what would be the real values of A and B?

Thank you