Question

What is data abstraction?

Answer 1

the answer is here:
data abstraction is the reduction of a particular body of data two simplified representation of the whole abstraction in general is the process of taking away or removing characteristics from something in order to reduce it into a set of essential characteristics
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Answer 2

Data abstraction in Java:

(i) Definition:

It is a mechanism of retrieving the essential details without dealing with background details.

(ii) There are three levels of abstraction:

(a) Physical level: It deals with the physical organization architecture of the application. Ex: In real world, an application designing of any problem comes under physical level abstraction.

(b) Logical level: It deals with what kind of data we are entering without dealing with physical architecture of the application. Ex: Entering the data into the database comes under logical level abstraction.

(c) View level: It deals with what kind of data we are retrieving without dealing with both logical level abstraction and physical level abstraction. Ex: retrieving the data from the database comes under view level abstraction.

(iii) Advantages of Data abstraction:

(a) Reduce code complexity.

(b) Hiding the details & exposing the essential part.

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