Solution - Interview Questions and Answers for 'Struts' | Search Java Interview Question

Solution - Interview Questions and Answers for 'Struts' - 9 question(s) found - Order By Newest

Very frequently asked.Usually among first few questions.

Q1. What is MVC ?

Design

^Anonymous

Ans. MVC is a Design Pattern that facilititates loose coupling by segregating responsibilities in a Web application

1. Controller receives the requests and handles overall control of the request
2. Model holds majority of the Business logic, and
3. View comprise of the view objects and GUI component

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Q2. How can we manage Error Messages in the web application ?

Solution

^Anonymous

Ans. Within message.properties file.

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Q3. Why Struts 1 Classes are not Thread Safe whereas Struts 2 classes are thread safe ?

^{Admin
info@buggybread.com}

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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Q4. Which MVC is struts2 based on ?

^Anonymous

Ans. MVC2

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Q5. 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 â€œpullâ€ 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 â€“ 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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Q6. 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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Q7. Which web application framework you like and Why ?

Framework

^{Admin
info@buggybread.com}

Ans. I like Spring as it comes with inbuilt Dependency Injection framework. It has great online community and support and is proven to work well with ORMs like Hibernate. If we are not working with ORM and DI, Struts 2 is also good.

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Q8. 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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Q9. What is struts.devMode?

^{Harish
harish.wheeler@gmail.com}

Ans. The struts.devMode is used to make sure that framework is running in development mode or production mode by setting true or false.

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