What is the role of a database administrator (DBA)? MCQ with Answer and Explanation

Explanation:
A Relation Schema defines the structure of a relation, specifying its name and the list of attributes along with their data types.

Explanation:
A Deletion Anomaly occurs when the deletion of a specific data record unintentionally deletes other distinct, unrelated information that should have been preserved.

Explanation:
DBMS generally involves higher initial costs and complexity compared to simple file systems, though it offers better control over redundancy, independence, and security.