1. Minimal Superkeys is called
A) Domain keys
B) Attribute keys
C) Candidate keys
D) Schema keys
Correct Answer: Candidate keys
Explanation : Minimal Superkeys is called Candidate keys.
2. The database schema is written in Data Control Language.
A) True
B) False
Correct Answer: False
Explanation : The database schema or database structure is written in Data Definition Language(DDL).
3. Which one of the following attributes can be taken as a primary key?
A) Department
B) Street
C) Name
D) Id
Correct Answer: Id