engineering recuitment IB JIO (Junior Intelligence Officer) Mock Test 2023 DBMS Integrity Constraints and Normal Form Functional Dependency
Let R(A, B, C, D) be a relation schema and F = {A → BC, AB → D, B → C} be the set of functional dependencies defined over R. Which of the following represents the closure of the attribute set {B}?
1
{A , C, D}
2
{B, C}
3
{A, B, C}
4
{B}