Servlets 面试题与答案
相关差异对比
问题 21. The code in a finally clause will never fail to execute, right?
Using System.exit(1); in try block will not allow finally code to execute.
问题 22. What mechanisms are used by a Servlet Container to maintain session information?
Cookies, URL rewriting, and HTTPS protocol information are used to maintain session information
问题 23. Difference between GET and POST
In GET your entire form submission can be encapsulated in one URL, like a hyperlink. query length is limited to 260 characters, not secure, faster, quick and easy.
In POST Your name/value pairs inside the body of the HTTP request, which makes for a cleaner URL and imposes no size limitations on the form's output. It is used to send a chunk of data to the server to be processed, more versatile, most secure.
问题 24. What is session?
The session is an object used by a servlet to track a user's interaction with a Web application across multiple HTTP requests.
问题 25. What is servlet mapping?
The servlet mapping defines an association between a URL pattern and a servlet. The mapping is used to map requests to servlets.
用户评价最有帮助的内容：
- 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?