Software Testing Infographic

It is a testing method through which the deployed software build is verified in order to ascertain whether it is stable or not. It can easily perform across every new build. It ensures whether the essential features of a specific build are properly working or not. https://dev.to/woodjessica/everything-you-need-to-know-about-smoke-testing-8ke 

Functional testing is a form of testing and is a quality assurance process that helps to validate the system or components against various functional specifications and requirements outlined.  Functional testing is a type of black-box testing as the source code of the application is not considered during the testing process.

The UAT testing process is taken up before planning to release the software into the market. This step ensures whether the software is complete according to the functional specifications defined by the product owner or not.

Software regression testing should be performed and taken up as soon as the programmer adds new functionality to an application.  This is because of the dependency between the newly added and previous functionality that is critical for the software to function according to the requirements defined.