What value represents missing, unknown, or inapplicable data in a relational database? MCQ with Answer and Explanation
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Question #1
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What is the purpose of the SQL 'WITH' clause (Common Table Expression)?
Correct Answer: Option D
Explanation:
A Common Table Expression (CTE) provides a temporary named result set that can be used within a SELECT, INSERT, UPDATE, or DELETE statement.
A Common Table Expression (CTE) provides a temporary named result set that can be used within a SELECT, INSERT, UPDATE, or DELETE statement.
This question belongs to:
Computer
Database Management System (DBMS)
Question #2
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What is a stored procedure?
Correct Answer: Option A
Explanation:
A stored procedure is a named collection of SQL statements and logic stored in the database, which can be invoked by applications.
A stored procedure is a named collection of SQL statements and logic stored in the database, which can be invoked by applications.
This question belongs to:
Computer
Database Management System (DBMS)
Question #3
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Which of the following terms refers to the duplication of data across multiple locations in a non-DBMS file system?
Correct Answer: Option B
Explanation:
Data Redundancy refers to the unnecessary duplication of the exact same data in multiple files or locations, which wastes storage and can cause inconsistencies.
Data Redundancy refers to the unnecessary duplication of the exact same data in multiple files or locations, which wastes storage and can cause inconsistencies.
This question belongs to:
Computer
Database Management System (DBMS)
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