• Stream:

It is a communication channel between application and destination file

• Limit of Persistence stores:

1.      cannot maintain huge amount of data

2.      doesn’t provide security to the data

3.      no query language support like sql

4.      performing all kings of persistence operation is always complex process

5.      cannot store mixed contain based data

6.      merging and comparison of data is always complex operation to perform

• Presentation Logic

• : the logic that we use to read input values for end user and to display business logic result for end user

• Business Logic

• the main logic of an application that generates the result based on given input values   

Persistence Logic:

• the logic develops in the application to interact with persistence stores and to perform persistence operation. It is always helps logic to business logic.

Java application use iostream based persistence logic to interact with files and to perform persistence operation on the files.

Java application can use JDBC code as persistence logic to interact with database software and to manipulates tables data

• CURD

in the industry level generally they use this term, which is nothing but create, update, read, delete operations. 

• Persistence Operation

performing insert, update, delete and select operation on persistence stores to manipulate the data. It is called as CURD operation