Question

Which of the following scenarios violates Boyce-Codd Normal Form (BCN

Q: Answer-Which of the following scenarios violates Boyce-Codd Normal Form (BCNF) in a relational schema?

BCNF is a stricter version of 3NF. A table is in BCNF if, for every functional dependency XYX , X is a superkey. If a candidate key determines another candidate key, it creates redundancy and violates BCNF. For instance, consider a table where StudentID and CourseID are candidate keys, but CourseID determines StudentID. This means there are multiple possible combinations leading to redundancy. Why Other Options Are Incorrect Option A This scenario adheres to both 3NF and BCNF, as all non-key attributes depend only on the primary key. Option B This violates 2NF due to partial dependency but does not directly address BCNF. Option C This violates 3NF by allowing transitive dependency but does not necessarily violate BCNF. Option E This statement is a valid condition for both 3NF and BCNF.