A relational database system needs to maintain data about the relations, such as the schema of the relations. This is called
A. Metadata
B. Catalog
C. Log
D. Dictionary
Answer:A
A relational database system needs to maintain data about the relations, such as the schema of the relations. This is called
A. Metadata B. Catalog C. Log D. Dictionary
Explanation:Each side of a platter of a disk has a read–write head that moves across the platter to access different tracks. 2. Relational schemas and other metadata about relations are stored in a structure called the ____________ .