Question 1 :

There is following table in db in you current running system

id fullname.
1 john doe
2 joe doe

Now question is if you want to split the fullname and store firstname,lastname in db.how will you do that?

1)current system is running and assume it's huge data base.
2) any script running to update this will take time and current system should be keep running and support CRUD operation at any given point of time.

Question 2:

Design a java client to call rest APi's.how will you maintain versions?