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samar

Java JDBC
1 Answer(s) 2 years and 7 months ago
Posted in : Java Interview Questions

What are the difference between DAO (Data Access Object ) and DAC (Data Access Component)?

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October 28, 2010 at 12:11 PM

Hi,

Here is the answer.

The advantage of using data access objects is that any business object(which contains application or operation specific details)does not require direct knowledge of the final destination for the information it manipulates. As a result, if it is necessary to change where or how that data is stored that modification can be made without needing to change the main application.

Data Access Objects can be used in Java to insulate an application from the underlying Java persistence technology, which could be JDBC, JDO, EJB, Hibernate, or any one of a range of technologies. Using Data Access Objects means the underlying technology can be upgraded or swapped without changing other parts of the application.

Thanks.

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