Which of the following database models organizes data in a tree-like upside-down structure with parent-child relationships? MCQ with Answer and Explanation
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Question #1
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What is the purpose of the SQL GROUP BY ... HAVING combination?
Correct Answer: Option B
Explanation:
HAVING is used in conjunction with GROUP BY to filter groups based on conditions applied to aggregate functions.
HAVING is used in conjunction with GROUP BY to filter groups based on conditions applied to aggregate functions.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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What does ACID stand for in the context of database transactions?
Correct Answer: Option D
Explanation:
ACID stands for Atomicity, Consistency, Isolation, and Durability, which are the key properties that guarantee reliable processing of database transactions.
ACID stands for Atomicity, Consistency, Isolation, and Durability, which are the key properties that guarantee reliable processing of database transactions.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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What is a data dictionary in a DBMS?
Correct Answer: Option B
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)
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