What is UI in testing?
User interface testing, a testing technique used to identify the presence of defects is a product/software under test by using Graphical user interface [GUI].
What is UI and UX testing?
What is UI and UX testing? UI testing focuses on testing the user interface of a website or other product to make sure everything functions as it should and that users understand how to use the UI. UX testing, though, focuses on the overall experience of the user and how the product or website makes the user feel.