Question

Does e4.7a depict a full key functional dependency?
1) Yes
2) No

Answer 1

No, e4.7a does not represent a full key functional dependency.

Step-by-step explanation:

No, e4.7a does not depict a full key functional dependency.

In order for a functional dependency to be considered full key, all the attributes on the left side of the arrow (->) should be a part of the key of the relation. If any attribute is missing, it is not a full key functional dependency.

For example, if the key of a relation is {A, B, C}, a full key functional dependency would be {A, B} -> C or {A, C} -> B or {B, C} -> A.