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面试准备

Servlets 面试题与答案

Test your skills through the online practice test: Servlets Quiz Online Practice Test

问题 31. When we don't write any constructor for the servlet, how does container create an instance of servlet?

Container creates instance of servlet by calling Class.forName(className).newInstance().

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问题 32. Once the destroy() method is called by the container, will the servlet be immediately destroyed? What happens to the tasks(threads) that the servlet might be executing at that time?

Yes, but Before calling the destroy() method, the servlet container waits for the remaining threads that are executing the servlet?s service() method to finish.

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问题 33. What is the difference between callling a RequestDispatcher using ServletRequest and ServletContext?

>We can give relative URL when we use ServletRequest and not while using ServletContext.

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问题 34. Why is it that we can't give relative URL's when using ServletContext.getRequestDispatcher() when we can use the same while calling ServletRequest.getRequestDispatcher()?

Since ServletRequest has the current request path to evaluae the relative path while ServletContext does not.

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通过聚焦学习路径、模拟测试和面试实战内容持续提升技能。

Servlets 面试题与答案

相关差异对比

问题 31. When we don't write any constructor for the servlet, how does container create an instance of servlet?

问题 32. Once the destroy() method is called by the container, will the servlet be immediately destroyed? What happens to the tasks(threads) that the servlet might be executing at that time?

问题 33. What is the difference between callling a RequestDispatcher using ServletRequest and ServletContext?

问题 34. Why is it that we can't give relative URL's when using ServletContext.getRequestDispatcher() when we can use the same while calling ServletRequest.getRequestDispatcher()?

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