Servlets 面接の質問と回答
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質問 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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質問 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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質問 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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質問 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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ユーザー評価で最も役立つ内容:
- What is Servlet?
- Why is Servlet so popular?
- What is servlet container?
- When a client request is sent to the servlet container, how does the container choose which servlet to invoke?
- If a servlet is not properly initialized, what exception may be thrown?