In the current Digital information age, Software industries, government organization and other IT industries has the priority of business across the world has focused on quality and reliability delivered software through process and technology. Quality of software is given with greater attention, which is resulting in reduction of software error in order to make quality software. In software engineering trend, software testing plays a significant role. Software testing is not a standalone

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... s; it is series of steps for finding defects that is variance between expected result and actual result. This paper contributes the study which includes theoretical aspects about various software testing techniques, a discussion of different testing tools and its working by taking practical example. Through this paper, we analyse that how the test cases are prepared and applying in software application through manual and automation testing.