What is a foreign key constraint violation? MCQ with Answer and Explanation
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Question #1
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Which property of a DBMS ensures that all operations within a transaction are completed successfully, or none of them are executed at all?
Correct Answer: Option B
Explanation:
Atomicity follows the 'all-or-nothing' rule, ensuring that a transaction is either fully committed or completely rolled back if an error occurs.
Atomicity follows the 'all-or-nothing' rule, ensuring that a transaction is either fully committed or completely rolled back if an error occurs.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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What is a super key in a relational database?
Correct Answer: Option D
Explanation:
A super key is a set of one or more attributes that uniquely identifies a row. A candidate key is a minimal super key.
A super key is a set of one or more attributes that uniquely identifies a row. A candidate key is a minimal super key.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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What is a relation in relational database terms?
Correct Answer: Option C
Explanation:
In the relational model, a relation is a table consisting of rows and columns.
In the relational model, a relation is a table consisting of rows and columns.
This question belongs to:
Computer
Database Management System (DBMS)
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