Professional Zend Server Interview Questions & Answers:
1. Please write down a program to show the execution of the application?
- The execution of the program can be done by using the methods of Decorators.
- Decorators provide the methods like errors, htmltag, labels, etc. to help the developers to use it and execute their applications.
- The program is written like this:
$label->render($htmlTag->render($errors->render($viewHelper->render(''))))
<input name="hello" id="hello" type="text" value="" />
<div class="error"><ul>
<li>...</li>
</ul></div>
<dd>
<input name="hello" id="hello" type="text" value="" />
<div class="error"><ul>
<li>...</li>
</ul></div>
</dd>
2. Explain what are the default methods provided by decorators?
- Decorators are used in the application to provide the functionality and make elements to work.
- The decorators being provided as default are as follows:
- ViewHelper: is a method that allows the viewing of the helper files used.
It allows the replacement of the content that is being provided.
- Errors: provide the error codes and messages that came during the execution of the application. It provides appending of the content.
- HTMLTag: that allows the tags to be written by using the parameters and attributes.
It provides the wrapping up of the content and decreasing the length of the code.
- Labels: are used to provide the informative keywords as it provides prepending of the content that is being provided.
The elements used by the decorator to be used in the application are as follows:
- ViewHelper: It allows the replacement of the content that is being provided.
- Errors: It provides appending of the content.
- HtmlTag (
): It provides the wrapping up of the content and decreasing the length of the code.
- Label: labels are used with the wrapping of the code using the tag
.
The form objects are also involved in it and are as follows:
- FormElements: are used to iterate the elements, display groups, and sub-forms that are used to render the elements used above.
4. Tell me what are the basic operations performed by the Decorator?
- Decorator provides the ability to append, prepend, and replace the content that is passed to the method.
- The content that is being initially placed provides the empty string and being processed with the decorator.
The operations that can be performed are shown below:
- Append: this allows the appending of the functions and methods that can be used to build an application.
- Prepend: this allows the content to be placed at the beginning of the file.
- Replace: this operation will allow the replacement of the content from any of the content that is present.
5. Explain what is being presented by the Decorators?
- Decorators are used to provide the Zend_Form in the case of developer's use and provide them the functionality to write the code.
- It determines the display and provides the final output of the input that is being provided by the developer.
- The solution is being managed by the modified decorator and it is used to decorate the object.
- The content can be generated by using the decorate methods and function or using the metadata.
- The metadata is being used with the elements or objects through which the content will be generated.
6. Do you know what are the methods used in Decorator?
- The methods used to render the view of the final window are shown as:
$window->render();
- The render view is being executed by the use of WindowScrollbarDecorator::render() method.
- It uses the WindowTitleDecorator::render() method, to be used as the decorator for the title and the rendering of it.
- WindowDecorator::render() method, is used as a Decorator of the window class that allow the main execution of the application.
- The rendering of the window is being done by using the function or method as: Window::render() that allows the simple use of state object.
7. Tell me what are the steps kept in mind while designing the Zend_Form?
- The markups are placed in the proper places with each element and with the use of form.
- The markup should be generated for the displaying of the element and in the form as well.
- Inject the values in the element markup with the metadata to design it more effectively.
- The reporting errors need to be kept in check to see the repetitive task that is being done using the code.
- The form solution is being provided to address the actions and other features that need to be addressed.
8. How to write a program to show the instantiation of the window class?
- The decorator is used to extend the functionality of the class that wraps up the structure.
- The decorator extends the class and its functionality by wrapping up in a defined pattern.
- The use of it allows the user to add or modify the existing behaviour of the API that is same.
- Decorators wrap other that identifies the original object and follows with the same API.
- The WindowDecorator is being created to display the window, by showing scrollbars, window title, etc;
$window = new WindowScrollbarDecorator(
new WindowTitleDecorator(
new WindowDecorator(
new Window()
)
)
);
9. Can you explain why are in-built libraries used for the web services?
- Zend framework is used to solve the development problems of the web applications and it provides resources for use.
- Web services are used for the development environment and to make it accessible to all the platforms.
- Web services are being provided by the zend framework and used in the application development process.
- The users uses the web services to access their work and other services and components.
- It uses the Zend_Registry and Zend_Log methods to have the registry setup and log being maintained while setting up the libraries for the web services.
10. Do you know what is the function Lucene?
- Lucene is an open source binary format used to have features for high performance and provide other tools to manage the resources.
- It provides fully featured text search engine that can be utilized by the applications and be used to execute it.
- It provides the storing of the data and the search indexes by providing the standardized query format for querying for other indexes.
- Lucene is a search engine provider that allows the functionality to be implemented for the indexes.
- Lucene uses the Apache project and having the zend library with the name Zend_Search_Lucene.
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