Virtual Gate Test Series: Databases - Aggregation

Question

Which of the following is not true?

1. Generalization is the result of taking the union of two or more disjoint entity sets to produce a higher level entity set.
2. Specialization is an abstraction in which relationship sets are treated as higher-level entity sets.
3. Canonical covers are used to decompose a relation into $\text{3NF,}$ which is a small relaxation of the $\text{BCNF}$ condition.
4. The concurrency control management component of the database is responsible for handling the concurrency control policies.

Answer 1

B is not true. It is a definition of aggregation

Aggregation is an abstraction in which relationship sets are treated as a higher level entity.
Specilaization is the result of taking a subset of a higher level entity sets a lower level entity sets.