Integration Testing

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Integration Testing
After completion of dependent programs development and unit testing, programmers will inter connect the programs to construct a complete software build. In this stage programmers will verify integration of programs in four types of approaches.
A. Top down Approach.
b. Bottom up Approach.
c. Hybrid Approach.
d. System Approach.
Top down Approach
In this approach the programmers will inter connect main models to some of the modules in the place of remaining sub modules programmers will use temporary programs called Stubs.
Bottom up Approach
In this approach the programmers will inter connect sub modules without connection to the main module. Programmers will use a temporary program instead of main module called Driver.
Hybrid Approach
It is a combined approach of Top Down and Bottom Up approaches. This approach is also known as Sandwich approach.
System Approach
It is also known as Final Integration (or) Big Bang Approach. In this integration programmers will inter connect programs after completion of total development.
Note: In general the programmers will inter connect programs through any one of the above methods depending on circumstances.


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