REST API Automation Testing from Scratch - REST Assured Java - What is an interface?

The video tutorial explains the concept of interfaces in Java, a core aspect of object-oriented programming. It highlights the difference between classes and interfaces, emphasizing that interfaces contain method signatures without bodies. Using a traffic rules analogy, the tutorial illustrates how interfaces enforce a contract for implementing methods. The video also demonstrates how to implement interfaces in Java using Eclipse, ensuring that all methods are correctly implemented in classes.

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