Data Abstraction Flashcards
1
Q
What is Data Abstraction?
A
Simply put, data abstraction is the process of hiding irrelevant details from users.
2
Q
What are the three levels of Data Abstraction in DBMS?
A
Highest: external/view level.
Intermediate: conceptual/logical level.
Lowest: internal/physical level.
3
Q
What does the intermediate level of Data Abstraction do?
A
It describes what data is stored in a database.
4
Q
What does the highest level of Data Abstraction do?
A
It describes the user interaction with a database system.
5
Q
What does the lowest level of Data Abstraction do?
A
It describes how data is actually stored in a database.
