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- Interview Questions and Answers for 'Struts2' - 5 question(s) found - Order By Newest

 Q1. Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ?
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Ans. Struts 1 actions are singleton. So all threads operates on the single action object and hence makes it thread unsafe.

Struts 2 actions are not singleton and a new action object copy is created each time a new action request is made and hence its thread safe.

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   Like         Discuss         Correct / Improve     java   j2ee   mvc frameworks   struts   struts1   struts2   struts 1   struts 2   architecture

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 Q2. Which MVC is struts2 based on ?
Anonymous
Ans. MVC2

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 Q3. Explain features of struts2 ?
Anonymous
Ans. 1) It is an Action based MVC based framework which has adopt mvc2.

2) Struts2 is a pull-MVC (or MVC2) framework where action takes the role of the model rather than the controller. The “pull” concepts means views ability to pull data from an action, rather than having a separate model object available.

3) The Model View-Controller pattern in Struts2 is implemented with five core components – actions, interceptors, value stack / OGNL, result types and results / view technologies.

4) XML configuration as well as Annotation option available.

5) POJO based action available so we can write test cases easily.

6) Integration with Spring, tiles and OGNL based expression langugae.

7) Theme based tag libraries integrated with struts tag as well as support of Ajax tag.

8) Can have various view options like jsp, velocity, freemarker etc.

9) We can embed plugin through which we can modify and extend framework features.

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 Q4. Do we have form beans in Struts 2 ?
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Ans. No, because they are not longer required. As action classes are no more singleton in Struts 2, user inputs can be captured in action itself.

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 Q5. Action Class is singleton and hence not thread safe in ..

a. All versions of Struts
b. Struts 1
c. Struts 2
d. None of Struts versions
Anonymous
Ans. Struts 1

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   Like         Discuss         Correct / Improve     struts   j2ee   mvc frameworks   struts1   struts2



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