Knowing the best practices to follow on every interface design project will put you far ahead of most candidates who easily fire off designs without taking into consideration the variety of details that go into the creation of an interface.
First things first — sometimes these keys are used incorrectly, and while it’s important to understand that while UI does play a crucial role in UX, the second discipline has a much huge scope.
This is not to say that UI isn’t important, since as we all know, it can create or break a website or app. However, UX designers need to take into consideration such diverse factors as interaction design and architecture, the innovative of clear taxonomies, copywriting, coordination with designers and programmers, and so on. It’s the overall design of an complete experience from top to bottom.
In order to create a great interface, UI designers requires to rely on information from the user experience angle, such as identifying which problems require to be solved, how the user flow will play out, and deciding key product areas and hierarchies. Ideally, serious work on the interface will start after gaining approach to all of this information, then mockups will be made, tested and approved by UX designers and a product will be established without (too many) hiccups.