j2ee questions

1.What is Test Driven Development (TDD)?
优点：在任意一个开发节点都可以拿出一个可以使用，含少量bug并具一定功能的产品。
　　缺点：增加代码量。测试代码是系统代码的两倍或更多。
　　TDD = TFD + Refactoring
　　(TFD -- Test First Development)

2.What is the point of Test Driven Development (TDD)? What do you think of TDD
What is aspect oriented programming (AOP)? Do you have any experience with AOP?
http://baike.baidu.com/view/76310.htm#sub8243857

3.What are the differences between OOP and AOP?
AOP、OOP在字面上虽然非常类似，但却是面向不同领域的两种设计思想。OOP（面向对象编程）针对业务处理过程的实体及其属性和行为进行抽象封装，以获得更加清晰高效的逻辑单元划分。
　　而AOP则是针对业务处理过程中的切面进行提取，它所面对的是处理过程中的某个步骤或阶段，以获得逻辑过程中各部分之间低耦合性的隔离效果。这两种设计思想在目标上有着本质的差异。

4.What are the benefits of AOP?
http://baike.baidu.com/view/73626.htm

5.What is attribute or annotation oriented programming?

6.What are the pros and cons of annotations over XML based deployment descriptors?

7.What is XDoclet?
XDoclet是一个开源项目，可以从这里得到他：http://xdoclet.sourceforge.net/xdoclet/ 。　XDoclet可以通过你在java源代码中的一些特殊的注释信息，自动为你生成配置文件、源代码等等，例如web、ejb的部署描述文件、为你生成struts的struts-config.xml配置文件、javascript校验等

8.What is inversion of control (IoC) (also known more specifically as dependency injection)?

9.What are the different types of dependency injections?

10.What are the benefits of IoC (aka Dependency Injection)?

11.What is the difference between a service locator pattern and an inversion of control pattern?
http://blog.csdn.net/dongtg/article/details/1748110

12.Why dependency injection is more elegant than a JNDI lookup to decouple client and the service?

13.Explain Object-to-Relational (O/R) mapping?

14.Give an overview of hibernate framework?

15.Explain some of the pitfalls of Hibernate and explain how to avoid them?

16.Give some tips on Hibernate best practices?

17.Give an overview of the Spring framework? What are the benefits of Spring framework?

18.Briefly explain key features of the JavaServer Faces (JSF) framework?

19.What is a Service Oriented Architecture (SOA)?
http://baike.baidu.com/view/21305.htm#sub5033544

20.Explain the J2EE 3-tier or n-tier architecture? What's the advantage?
Explain MVC architecture relating to J2EE?

21.HTTP is a stateless protocol, so, how do you maintain state? How do you store user data between requests?

22.What are ear, war and jar files? What are J2EE Deployment Descriptors?
http://blog.csdn.net/gideal_wang/article/details/6066780

23.Session tracking uses cookies by default. What would you do if the cookies are turned off?
http://blog.csdn.net/zlsunnan/article/details/133386

24.Explain the life cycle methods of a servlet?

25.What is the difference between doGet () and doPost () or GET and POST?

26.What is the difference between forwarding a request and redirecting a request?

27. What is a filter, and how does it work?
http://blog.csdn.net/gxf212/article/details/877047

28. What is client-side vs. server-side validation?

29.How do you prevent multiple submits due to repeated “refresh button” clicks?

30. Tell me about JSP best practices?

31.What is JDBC? How do you connect to a database? Have you used a Data Access Object (i.e. DAO) pattern?

32.What are JDBC Statements? What are different types of statements? How can you create them? What is the difference between statements and prepared statements?
http://blog.csdn.net/army27/article/details/5012635

33.What is a Transaction?What is a distributed transaction? How does it differ from a local transaction?
http://qify.iteye.com/blog/315619
ACID，是指在数据库管理系统（DBMS）中事务所具有的四个特性：原子性（Atomicity）、一致性（Consistency）、隔离性（Isolation，又称独立性）、持久性（Durability）。

34.What is JNDI? How do you uses within a J2EE application?
http://blog.csdn.net/h72001346/article/details/3474381

35.What is application server clustering?  What's the benefit?
http://vvovv.iteye.com/blog/1490639

36.How would the JSF framework compare with the Struts framework? How would a Spring MVC framework compare with Struts framework?