接口和抽象类有什么区别?
问题描述：
可能是最著名的软件开发人员工作面试问题之一.
Probably one of the most famous software developer job interview questions.
你的答案是什么?
我想知道你会如何在现实生活中回答这个问题.请尝试像在真实的工作面试中一样制定您的答案(完整，但不要太长，当然不要发布链接).
I'm trying to find out how you would answer this in a real-life situation. Please try to formulate your answer as you would on a real job interview (be complete, but don't be too long, post no links of course).
答
接口只描述其方法的实际签名等.任何实现该接口的类都必须提供显式实现.
An interface only describes the actual signature of its methods etc. Any class implementing that interface must then provide an explicit implementation.
抽象类可以包含其方法等的部分实现.
An abstract class can contain a partial implementation of its methods etc.