面试的重要问题 [英] Important question for interview

问题描述

抽象类和接口有什么区别？

什么是抽象类？

什么是抽象方法？

什么是接口？

what is the difference between abstract class and interface ?
what is abstract class ?
what is abstract method ?
what is interface ?

推荐答案

如果你不知道这一点，你就不配得到这份工作！这是非常基本的东西，我希望任何用C＃做过任何事情的人都知道。



如果你自己无法回答这个问题，那么你将失败当他们遇到更难的时候，接下来的采访。

读一本书，学习基础知识！

If you don't know this, you don't deserve to get the job! This is very basic stuff, that I would expect anyone who has done anything with C# to know.

If you can't answer this yourself, then you will fail the rest of the interview when they get to the harder stiff.
Read a book, and learn the basics!

抽象类和接口有什么区别？



抽象类有一个体（成员元素），而接口没有体。



什么是抽象类？



声明类摘要意味着我们不能自己实例化，只是属于子类。



什么是抽象方法？



声明方法摘要意味着它的定义将在子类中提供。 br />


什么是接口？



接口



Java中的接口类似于类，但接口的主体可以是只包括抽象方法和最终字段（常量）。



这是一篇关于抽象类和接口的好文章。



抽象类和接口的重要性

what is the difference between abstract class and interface ?

Abstract Class has a body ( member elements ) whereas interfaces don't have a body.

what is abstract class ?

Declaring a Class Abstract means that we can't instantiate on its own and is only meant to be sub-classed.

what is abstract method ?

Declaring a method abstract means that It's definition will be provided in the sub-class.

what is interface ?

Interface

An interface in Java is similar to a class, but the body of an interface can include only abstract methods and final fields (constants).

Here is a good article on abstract classes and interfaces.

Importance of Abstract Classes and Interfaces

这篇关于面试的重要问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！