Question

Identify the correct statement. Marks: 2, MCQ a) Logical level Abstraction: hide details of data types. b) Logical level Abstraction: describes how schema is stored in a data base. c) Logical level Abstraction: describes how a record is stored. d) Logical level Abstraction: describes accessibility of the database by an individual user.

Answer 1

Heyaaa mate

The answer is

Option B

Hope it helps you

Answer 2

Answer:

a) Logical level Abstraction: hide details of data types.

Explanation:

There are three types of data abstraction exist in a database:

• Physical level: The lowest level of abstraction describes how data are actually stored in a database.
• Logical level: The next higher level of abstraction describes what data are stored in the database and what relationships exist among those data. Hence, it does not describe details of data type.
• View level: The highest level of abstraction describes only part of the entire database. View level abstraction exits to simplify user interaction with the system.