Zend Server Interview Preparation Guide
Download PDF

Zend Server frequently Asked Questions in various Zend job Interviews by interviewer. The set of Zend Server interview questions here ensures that you offer a perfect answer to the interview questions posed to you. Get preparation of Zend Server job interview

20 Zend Questions and Answers:

1 :: Do you know what is the way in which the HTML can be used to form elements?

- The form elements can be customized using the decorators and using the Zend_Form for the rendering of the output.

- The description decorator can be used to have an instance running that allow the HTML to create the form elements.

- The turning of escape characters is required for the output of the decorator and it can be represented as shown below:

$element->setDecorators(array(
array('ViewHelper'),
array('Description', array('escape', false)),
array('Errors'),
array('HtmlTag', array('tag' => 'dd')),
array('Label', array('tag' => 'dt')),
));

- The element can be set to use the description by adding the extra HTML to this and it can be done using this:

$element->setDescription('<strong>Hello World</strong>');

2 :: Explain what is the procedure to see that the optional file is detected?

- There is a use of receive() method that returns true for the file element which is not required.

- The file can be neglected when using the method mentioned above, as soon as the file gets opened it detected.

- The method returns the false in case of any error or the file hasn’t been copied or uploaded directly.

- There are other methods used to provide the detection of the file using the elements in normal HTML file.

- The methods can detect the file and provide the tools to make the file being detected.

3 :: How to write a program that performs the calculations using the SQL function?

- The SQL functions are used to perform the calculations of the statements using the Zend_Db_Select command.

- The expression needs to have parentheses and the command that is given as Zend_Db_Select need to provide the statement appropriately.

- The Zend_Db_Expr is used to explicitly create the expressions that are given below:

$select = $db->select()
->from(array('p' => 'products'),
array(
'product_id',
'cost_plus_tax' => new Zend_Db_Expr('p.cost * 1.08'),
));

4 :: Can you explain what is the difference between Zend_Auth and Zend_Acl?

- Zend_Auth provides the authentication protocol for the users using many methods whereas; Zend_Acl is used for authorization purpose.

- Zend_Auth uses the methods like LDAP, OpenID and HTTP to provide the authentication, whereas Zend_Acl uses Access Control List for authorization.

- Zend_Auth provide the authentication in the form of verifying and providing the credentials for the user’s system, whereas Zend_Acl uses list of roles that is being implemented only those who are authorized to it.

- Zend_Auth provides an environment to the system through which user who is authenticated for use, whereas Zend_Acl performs some operations on the specific resources that need to be written on the system.

- Zend_Auth supports the authentication platforms features, whereas Zend_Acl supports the advanced definitions with features of multiple inheritance and other similar features.

5 :: Tell me what are the ways in which the file can be detected as being uploaded or not?

- There are certain functions used for the detection of the file and check whether the file is being uploaded properly or not.

- The use of isUploaded() function with the pre-defined parameters are used to check and it returns the boolean result.

- The use of getFileName() method is used to provide the latest releases of the file and returns the NULL.

- The use of getFileInfo() provides a way to make an empty file key that can be used to check whether the file is being uploaded or not.

- The flag is set for the isUploaded() method to false that allow the detection to be made easy.

6 :: Do you know what is the use of Zend framework?

- Zend framework is a robust framework that provides the components used by the web applications.

- It provides inbuilt libraries and functions to make the programming and integration easier.

- Zend framework consists of loosely coupled components that can be used to easily integrate in an application.

- It is used for the web application that uses lots of functions and libraries without writing much of the coding.

- It provides tools that can be used to have the standalone component based architecture.

7 :: Tell me what is the function of model in MVC architecture?

- MVC is made up of model, view and controller components to, represents the data in the architectural form.

- The model component can vary from one requirement to another for MVC application.

- The function model represents the application that has the abstract processing of the components.

- It uses the zend framework that defines MVC architecture at one place and allow the applications to use it.

- It is having the model interface, class and other components that used to identify the value and provide the limitations on the use.

8 :: How to write a program to show the function of action helper?

- Action helper is used to create the application and instantiate the object of it using the Zend_View.

- The object is used and stored using the ViewRenderer’s property that creates an instance and provides more options.

- It includes the dispatch process before any action is being dispatched from the view and the example code is given as:

if (!isset($viewRenderer->view)) {
$viewRenderer->initView();
}
$view = $viewRenderer->view;

9 :: Explain what is the function of action helper in Zend?

- Zend allows the creation of application using the framework that provides MVC architecture.

- The action helper is used to instantiates and store the object i.e Zend_View and other objects that are related to view.

- It also provides ways to inject the instantiation process in different objects by the help of action helper.

- The view object is stored in the view property provided by the action helper and a view instance is created using this.

- ViewRenderer instance is being created using the action helper function and it allows creating sync between all the objects.

10 :: How to write a program to retrieve the view object within plugin?

- Zend uses the framework that allows easy retrieving of the object within the arbitrary code.

- It uses the action helper and other class methods to view the object within the plugin.

- The method ViewRenderer() is used by default in the zend framework to view and render the components.

$viewRenderer = Zend_Controller_Action_HelperBroker::getStaticHelper('viewRenderer';
$view = $viewRenderer->view;