Which of the following refers to the level of data abstraction that describes exactly how the data actually stored?a.Physical Levelb.Logical Levelc.Conceptual Leveld.File Level

Which of the following is/are the levels of implementation of data structure?Select one:a.Abstract levelb.Application levelc.Implementation leveld.All of the above

What is data abstraction?

What are the different levels of abstraction in a DBMS?Physical LevelLogical LevelTop LevelView LevelEntity Level

Considering the Three-Schema Architecture, which of the following is correct?A. The conceptual level describes the physical storage structure of the database.B. Logical data independence provides the ability to move the physical location of where data is stored without making changes to the applications.C. Physical data independence provides the ability to modify physical schema without making changes to the logical schema.D. The external level provides access to changing the schema of the relations in a database.

Form of data model which focuses concepts in same way as data stored in computer system is classified aslow level data modelshigh level data modelsdynamic data modelsmedium level data models