Question
27. If there is a one-to-one relationship from entity A to B , then a. there exists a functional dependency from the primary key in
27. If there is a one-to-one relationship from entity A to B , then a. there exists a functional dependency from the primary key in A to the primary key in B, i.e., PK(A) -> PK(B). b. there exists a functional dependency from the primary key in B to the primary key in A, i.e., PK(B) -> PK(A). c. both a. and b. d. neither a. nor b.
28. If there is a one-to-many relationship from entity A to B , then a. there exists a functional dependency from the primary key in A to the primary key in B, i.e., PK(A) -> PK(B). b. there exists a functional dependency from the primary key in B to the primary key in A, i.e., PK(B) -> PK(A). c. both a. and b. d. neither a. nor b.
29. If there is a many-to-many relationship from entity A to B , then a. there exists a functional dependency from the primary key in A to the primary key in B, i.e., PK(A) -> PK(B). b. there exists a functional dependency from the primary key in B to the primary key in A, i.e., PK(B) -> PK(A). c. both a. and b. d. neither a. nor b.
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Beginning ASP.NET 2.0 And Databases
Authors: John Kauffman, Bradley Millington
1st Edition
0471781347, 978-0471781349
