Ans : An action listener is a class that wants to be notified when a command component fires an action event. An action listener contains an action listener method that processes the action event object passed to it by the command component
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Can an entity object be based on two Database Objects(tables/views) or two Webservices ?
Ans : No entity objects will always have one to one relationship with a database object or web service.
Setting the range of table
Ans : <af:table rows=”#{bindings.LoggedInUserServiceRequests.rangeSize}”…/>
How to declare the page navigation (navigation rules) in faces-config.xml file in ADF 10g?
Ans: Navigation rules tells JSF implementation which page to send back to the browser after a form has been submitted. We can declare the page navigation as follows:
<naviagation-rule>
<from-view-id>/index.jsp</from-view-id>
<navigation-case>
<from-outcome>login</from-outcome>
<to-view-id>/welcome.jsp</to-view-id>
</navigation-case>
</naviagation-rule>
This declaration states that the login action navigates to /welcome.jsp, if it occurred inside /index.jsp.
<naviagation-rule>
<from-view-id>/index.jsp</from-view-id>
<navigation-case>
<from-outcome>login</from-outcome>
<to-view-id>/welcome.jsp</to-view-id>
</navigation-case>
</naviagation-rule>
This declaration states that the login action navigates to /welcome.jsp, if it occurred inside /index.jsp.
What are the different kinds of Bean Scopes in JSF?
ANS: JSF supports three Bean Scopes. viz.,
Request Scope: The request scope is short-lived. It starts when an HTTP request is submitted and ends when the response is sent back to the client.
Session Scope: The session scope persists from the time that a session is established until session termination.
Application Scope: The application scope persists for the entire duration of the web application. This scope is shared among all the requests and sessions.
Request Scope: The request scope is short-lived. It starts when an HTTP request is submitted and ends when the response is sent back to the client.
Session Scope: The session scope persists from the time that a session is established until session termination.
Application Scope: The application scope persists for the entire duration of the web application. This scope is shared among all the requests and sessions.
Difference between Backing Bean and Managed Bean?
| Backing Beans | Managed Beans |
| A backing bean is any bean that is referenced by a form. | A managed bean is a backing bean that has been registered with JSF (in faces-config.xml) and it automatically created (and optionally initialized) by JSF when it is needed. |
| The advantage of managed beans is that the JSF framework will automatically create these beans, optionally initialize them with parameters you specify in faces-config.xml, | |
| Backing Beans should be defined only in the request scope | The managed beans that are created by JSF can be stored within the request, session, or application scopes |
What is view object?
Ans :A view object is a model object used specifically in the presentation tier. It contains the data that must display in the view layer and the logic to validate user input, handle events, and interact with the business-logic tier. The backing bean is the view object in a JSF-based application. Backing bean and view object are interchangeable terms
What is Backing Bean?
Ans:Backing beans are JavaBeans components associated with UI components used in a page. Backing-bean management separates the definition of UI component objects from objects that perform application-specific processing and hold data.
Backing bean is about the role a particular managed bean plays. This is a role to be a server-side representation of the components located on the page. Usually, the backing beans have a request scope, but it is not a restriction.
The backing bean defines properties and handling-logics associated with the UI components used on the page. Each backing-bean property is bound to either a component instance or its value. A backing bean also defines a set of methods that perform functions for the component, such as validating the component’s data, handling events that the component fires and performing processing associated with navigation when the component activates.
Backing bean is about the role a particular managed bean plays. This is a role to be a server-side representation of the components located on the page. Usually, the backing beans have a request scope, but it is not a restriction.
The backing bean defines properties and handling-logics associated with the UI components used on the page. Each backing-bean property is bound to either a component instance or its value. A backing bean also defines a set of methods that perform functions for the component, such as validating the component’s data, handling events that the component fires and performing processing associated with navigation when the component activates.
What is Managed Bean?
Ans:JavaBean objects managed by a JSF implementation are called managed beans. A managed bean describes how a bean is created and managed. It has nothing to do with the bean’s functionality.
Managed bean is about how the bean is created and initialized. As you know, jsf uses the lazy initialization model. It means that the bean in the particular scope is created and initialized not at the moment when the scope is started, but on-demand, i.e. when the bean is first time required.
Managed bean is about how the bean is created and initialized. As you know, jsf uses the lazy initialization model. It means that the bean in the particular scope is created and initialized not at the moment when the scope is started, but on-demand, i.e. when the bean is first time required.
What is Top Link?
Ans:
Top Link is an Object-Relational Mapping layer that provides a map between the Java objects that
the model uses and the database that is the source of their data.
By default, a session is created named default. In the following steps, you create a new session
Top Link is an Object-Relational Mapping layer that provides a map between the Java objects that
the model uses and the database that is the source of their data.
By default, a session is created named default. In the following steps, you create a new session
What are business Component In ADF.Describe them?
Ans: All of these features can be summarized by saying that using ADF Business Components for your J2EE business service layer makes your life a lot easier. The key ADF Business Components components that cooperate to provide the business service
implementation are:
-->Entity Object
An entity object represents a row in a database table and simplifies modifying its data by handling all DML operations for you. It can encapsulate business logic for the row to ensure your business rules are consistently enforced. You associate an entity object with others to reflect relationships in the underlying database schema to create a layer of business domain objects to reuse in multiple applications.
-->Application Module
An application module is the transactional component that UI clients use to work with application data. It defines an up datable data model and top-level procedures and functions (called service methods) related to a logical unit of work related to an end-user task.
-->View Object
A view object represents a SQL query and simplifies working with its results. You use the full power of the familiar SQL language to join, project, filter, sort, and aggregate data into exactly the “shape” required by the end-user task at hand. This includes the ability to link a view object with others to create master/detail
hierarchies of any complexity. When end users modify data in the user interface,your view objects collaborate with entity objects to consistently validate and save the changes
ORACLE ADF Interview Questions and Answers
implementation are:
-->Entity Object
An entity object represents a row in a database table and simplifies modifying its data by handling all DML operations for you. It can encapsulate business logic for the row to ensure your business rules are consistently enforced. You associate an entity object with others to reflect relationships in the underlying database schema to create a layer of business domain objects to reuse in multiple applications.
-->Application Module
An application module is the transactional component that UI clients use to work with application data. It defines an up datable data model and top-level procedures and functions (called service methods) related to a logical unit of work related to an end-user task.
-->View Object
A view object represents a SQL query and simplifies working with its results. You use the full power of the familiar SQL language to join, project, filter, sort, and aggregate data into exactly the “shape” required by the end-user task at hand. This includes the ability to link a view object with others to create master/detail
hierarchies of any complexity. When end users modify data in the user interface,your view objects collaborate with entity objects to consistently validate and save the changes
ORACLE ADF Interview Questions and Answers
What is Oracle Adf?
Ans :
The Oracle Application Development Framework (Oracle ADF) is an end-to-end application framework that builds on J2EE standards and open-source technologies to simplify and accelerate implementing service-oriented applications. If you develop enterprise solutions that search, display, create, modify, and validate data using web,wireless, desktop, or web services interfaces, Oracle ADF can simplify your job. Used
in tandem, Oracle JDeveloper 10g and Oracle ADF give you an environment that covers the full development lifecycle from design to deployment, with drag-and-drop data binding, visual UI design, and team development features built-in.
ORACLE ADF Interview Questions and Answers
The Oracle Application Development Framework (Oracle ADF) is an end-to-end application framework that builds on J2EE standards and open-source technologies to simplify and accelerate implementing service-oriented applications. If you develop enterprise solutions that search, display, create, modify, and validate data using web,wireless, desktop, or web services interfaces, Oracle ADF can simplify your job. Used
in tandem, Oracle JDeveloper 10g and Oracle ADF give you an environment that covers the full development lifecycle from design to deployment, with drag-and-drop data binding, visual UI design, and team development features built-in.
ORACLE ADF Interview Questions and Answers
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