Consider the schema :
Emp (eid : integer, ename : string, age : integer, salary : real)
Works (eid : integer, did :integer, pct-time : integer)
Dept (did : integer, dname : string, budget : real, manager_id : integer)
Specify the number of possible foreign keys in the above schema :
1
2
2
4
3
3
4
none of the above
5
Question Not Attempted