Answer / lavanya

The purpose of integration testing is to ensure distinct components of the application still work to accordance of the user requirements. The purpose of system testing is to validate an application and completeness in performing as designed and to test all functions of the system that is required in real life.

Integration testing is the phase in software testing in which individual software modules are combined and tested as a group.
It occurs after unit testing and before system testing.
Integration testing takes as its input modules that have been unit tested, groups them in larger aggregates, applies
tests defined in an integration test plan to those aggregates, and delivers as its output the integrated system
ready for system testing.

The basic difference is integration testing is the phase in software testing in which individual software modules are combined and tested as a group. It occurs after unit testing and before validation testing.

System testing of software or hardware is testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements. System testing falls within the scope of black box testing

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