Which type of subquery executes once for each row evaluated by the outer query, depending on values provided by the outer statement? MCQ with Answer and Explanation
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Question #1
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Which of the following is a type of database backup?
Correct Answer: Option D
Explanation:
Full, incremental, and differential backups are common backup strategies.
Full, incremental, and differential backups are common backup strategies.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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What is a data dictionary in a DBMS?
Correct Answer: Option C
Explanation:
The data dictionary stores metadata such as table definitions, column types, constraints, and other database objects.
The data dictionary stores metadata such as table definitions, column types, constraints, and other database objects.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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What is the purpose of a Foreign Key?
Correct Answer: Option C
Explanation:
A foreign key establishes a relationship between tables and maintains referential integrity.
A foreign key establishes a relationship between tables and maintains referential integrity.
This question belongs to:
Computer
Database Management System (DBMS)
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