Black Box Testing

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Black Box Testing
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• Functional Testing
• Functional testing is defined as the process of
  ensuring that each feature of a software
  programme performs in line with the requirements
  and specifications. This type of testing does not
  concern the application's source code. The
  software programs various features are assessed
  by inputting test data anticipating the outcome
  and comparing the result with the expected one.
  This evaluation focuses on inspecting elements
  like user interface, APIs, database
  functionality, security measures, client or
  server applications and overall functionality of
  the Application Under Test. Functional testing
  can be carried out manually or, through
  automation. Helps determine the requirements of
  the systems software.
• https//erpsolutions.oodles.io/developer-blogs/Bla
  ck-Box-Testing/

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• Regression Testing
• Regression testing entails inspecting the
  sections of the code that have been modified and
  those that may be affected by the changes to
  ensure that no new mistakes have been introduced
  into the software as a result of these
  adjustments. In software terms regression
  signifies the reappearance of a bug. Its purpose
  is to confirm that the added code works well with
  the existing code ensuring that a software update
  does not disrupt the software's functionality.
  This process is typically conducted following
  system maintenance activities and upgrades.