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 ____________ .
A. Metadata
B. Catalog
C. Log
D. Data Dictionary
Answer:A
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 ____________ .
A. Metadata B. Catalog C. Log D. Data Dictionary
Explanation:Data dictionary is also called as system catalog. 3. ___________ is the collection of memory structures and Oracle background processes that operates against an Oracle database.