What is the most important difference between API testing and UI testi

1.	What is the most important difference between API testing and UI testing?
Answer» UI TESTING REPRESENTS testing by using GRAPHICAL User Interface. The main area of focus in this is to test the look and feel of the software application by focusing on how the application is feasible for the end-users, do the functionalities of all the items shown on the UI screen - images, fonts, buttons, layouts etc are APPEARING properly as expected. On the other hand, API testing ensures the testing of communication of data between various software SYSTEMS. It mostly falls under the validation of back-end functionality.

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