Question

he type of data independence in which the schema can be altered on conceptual level without altering external level is classified as

Answer 1

The type of data independence in which the schema can be tainted on conceptual level without altering external level is classified as Logical Data Independence.

It is the one which has ability to change logical schema without altering external schema or function.

Logical data independence in any recorded applications relates to views where one can only see the data rather than altering the data.