Write down if the following sentences are true or false. a. A conceptual schema describes the details of the physical storage structure b. The database state includes descriptions of the database structure, data types, and the constraints. c. Physical Data Independence is the capacity to change the internal schema without having
Write down if the following sentences are true or false.
a. A conceptual schema describes the details of the physical storage structure
b. The
constraints.
c. Physical Data Independence is the capacity to change the internal schema without having
to change the conceptual schema.
d. A database system includes both DBMS software and the data.
e. A multi-valued attribute is composed of several components where the composition may
form a hierarchy.
f. A key attribute may be composite.
g. A recursive relationship is when two different entity types participate in a relationship in
distinct roles.
h. Generalization is the process of defining a set of subclasses of a superclass.
i. If a specialization is overlapping, then the same entity may be a member of more than one
subclass of the specialization.
j. If a specialization is total, then an entity of the superclass may not belong to any of the
subclasses.
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