What is the concept of data independence? MCQ with Answer and Explanation

Question Report Error
What is the concept of data independence?
A. The ability to change the database schema without affecting the application programs
B. The ability to move data between tables
C. The ability to store data in different formats
D. The ability to access data from multiple sources
Answer: Option A
Solution (By JKExamLibrary)
Data independence is the capacity to change the database schema at one level without affecting the next higher level, minimizing impact on applications.
This question belongs to: Computer Database Management System (DBMS)

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Practice More Database Management System (DBMS) Questions

Question #1 Report Error
Which of the following is a property of a well-designed database?
A. All of the above
B. Support for efficient data retrieval
C. Avoidance of data redundancy
D. Ease of data maintenance
Discuss

Correct Answer: Option A

Explanation:
Good database design aims to minimize redundancy, simplify maintenance, and provide efficient access.
This question belongs to: Computer Database Management System (DBMS)
Question #2 Report Error
Which type of database model organizes data in a tree-like structure?
A. Hierarchical model
B. Relational model
C. Object-oriented model
D. Network model
Discuss

Correct Answer: Option A

Explanation:
The hierarchical model arranges data in a parent-child relationship, forming a tree structure.
This question belongs to: Computer Database Management System (DBMS)
Question #3 Report Error
What is the default behavior of a foreign key when a referenced row is deleted?
A. Cascade delete
B. Set null
C. Depends on the ON DELETE action specified
D. Restrict
Discuss

Correct Answer: Option C

Explanation:
The behavior is defined by the ON DELETE rule (CASCADE, SET NULL, RESTRICT, NO ACTION) specified in the foreign key constraint.
This question belongs to: Computer Database Management System (DBMS)
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