Ques:
1). What is Oracle ADF, and how does it work?
Answer:
The
Oracle Application Development Framework (Oracle ADF) is an end-to-end
application framework that simplifies and accelerates the implementation of
service-oriented applications by leveraging J2EE standards and open-source
technologies. Oracle ADF can help you construct enterprise applications that
use web, wireless, desktop, or web services interfaces to search, display,
generate, change, and validate data. With drag-and-drop data binding, visual UI
design, and team development tools built-in, Oracle JDeveloper 10g and Oracle
ADF provide an environment that covers the whole development lifecycle from
design to deployment.
Oracle
Fusion Applications interview Questions and Answers
Ques:
2). What is Managed Bean, and how does it work?
Answer:
Managed
beans are JavaBean objects that are managed by a JSF implementation. A managed
bean represents the process of creating and managing a bean. It has nothing to
do with the functionality of the bean.
A
managed bean is one that is produced and initialised in a controlled manner.
JSF, as you may know, employs a lazy initialization model. It means that the
bean in a specific scope is created and initialised on-demand, that is, when
the bean is requested for the first time.
Oracle Accounts
Payables Interview Questions and Answers
Ques:
3). What exactly is task flow?
Answer:
ADF
task flows are a modular way to defining application control flow. You can
break up an application into reusable task flows rather than portraying it as a
single huge JSF page flow. A piece of the application's navigational graph is
contained in each task flow. The activities are the nodes in the task flows. A
simple logical process, such as displaying a page, running application logic,
or calling another task flow, is represented by an activity node. Control flow
cases are the interactions between the activities.
Oracle
Access Manager Interview Questions and Answers
Ques:
4). What are the benefits of task flow over JSF flow?
Answer:
- ADF task flows have a
number of advantages over JSF page flows.
- The app can be divided
into a set of modular processes that communicate with one another.
- Views, method calls,
and calls to other task flows can all be added to the task flow diagram.
- Navigation is used to
move between sites and other operations, such as routers.
- Task flows created
using ADF can be reused inside the same or a different application. You
might decide to reuse task flows after you've broken up your application
into task flows.
- Data can be
transmitted between activities inside the task flow using shared memory
scope (for example, page flow scope).
- Page flow scope
defines a unique storage area for each instance of an ADF bounded task
flow.
Oracle
Fusion HCM Interview Questions and Answers
Ques:
5). What is Adf Event handling and how does it work?
Answer:
Event handling
is normally done on the server in classic JSF applications. JSF event handling
is based on the JavaBeans event paradigm, in which the JSF application uses
event classes and event listener interfaces to handle events provided by
components.
Clicking
a button or link, selecting an item from a menu or list, and altering a value
in an input field are all examples of user events in an application. When a
user activity, such as pressing a button, occurs, the component creates an
event object, which holds information about the event and identifies the
component that caused it. An event queue is also created for the event. JSF
instructs the component to broadcast the event to the relevant registered
listener at the appropriate point in the JSF lifecycle, which then calls the
listener method to process the event. The listener method can either update the
user interface or call backend application logic.
ADF
Faces command components, like regular JSF components, send out ActionEvent
events when they're triggered, while ADF Faces input and select components send
out ValueChangeEvent events when their local values change.
Oracle SCM
Interview Questions and Answers
Ques:
6). What is Association Accessor?
Answer:
It's a
method for an entity instance at one end of an association to communicate with
the linked entity object instance at the other end. A source assessor travels
from the destination to the source, while a destination assessor travels from
the source to the destination.
It is
described in the entity object definition xml files, which can be used to
specify cross entity relationships by view object and view link definition. Its
return type is either the associated entity object definition's entity object
class or 'EntityImpl' if the associated entity object definition does not have
an entity object class.
Oracle
Financials Interview questions and Answers
Ques:
7). What is the difference between Datacontrol.dcx and Databindings.cpx?
Answer:
The
Oracle ADF binding context for your entire application is contained in the
DataBindings.cpx file, which also contains the metadata from which the Oracle
ADF binding objects are constructed at runtime. When you register data controls
on business services, the DataControls.dcx file is created. Oracle ADF Business
Components does not generate this file. It specifies the Oracle ADF model layer
data control classes (factory classes) that help the client and the accessible
business service interact.
Oracle
Cloud Interview Questions and Answers
Ques:
8). Why did you choose ADF?
Answer:
I had
already developed a strong interest in technology with the goal of making a
substantial impact. As the main development framework, ADF may be used to
create virtually any form of enterprise application. I became interested in
this technology since it is so beneficial. Of course, this is in keeping with
my goals and ambitions.
Second,
ADF is widely recognised as the most advanced J2EE development framework. As a
result, the ADF 11g is used to build the Oracle Fusion Middleware stack. This
is why we have so many options here.
Finally,
ADF contains a number of built-in components that help us with the work of
developing code. This way, I can actually focus on the features of the
application and how it can do more good to the business.
Oracle PL/SQL Interview Questions and Answers
Ques:
9). What is the difference between a binding context and a binding container?
Answer:
The
binding context, which is used to access the binding layer, is a runtime map
between data controls and page definitions of pages in the application. The EL
expression on your jspx pages gives you access to it. The page bindings are
instantiated using the binding container, which is a request-scoped map. The EL
expressions provide access to this. It is also accessible throughout every page
request because it is a request-scoped map.
Oracle SQL Interview Questions and Answers
Ques:
10). What is the difference between Visible and Render property?
Answer:
The
visible property is set to true or false depending on whether the field should
be visible on the page at run time. Even though the field or component is
hidden, it still exists on the page.
The
render attribute is used to load the component conditionally based on a set of
criteria.
Oracle RDMS Interview Questions and Answers
Ques:
11). In Adf, how do you define pagination?
Answer:
In
ADF, we establish custom pagination by utilising the af:iterator tag to create
a custom table as a taskflow. This renders the data collection in the same way
that a table does. Now, using the ADF bindings declaration, we tie the value
property of the iterator to the collection model and set the number of visible
rows to 15, for example.
BI Publisher Interview Questions and Answers
Ques:
12). What is the Adf Lifecycle and how does it work?
Answer:
The
ADF Lifecycle is divided into nine stages:
1.
Set
the Context: The lifecycle, the binding container, and other values are all
set.
2.
Create
the Model: The application model is created by providing it with the necessary
parameters. ADF is also provided the necessary instructions.
3.
Apply
Input Values: This phase handles the application's access request.
4.
Validate
Input Values: Verifies the values specified in phase 3 of the request.
5.
Update
Model: Data is stacked up and updated when the input values have been
validated.
6.
Validate
Model Updates: Validate the updated input values.
7.
Process
Component Updates: This is where all activities involving input values are
handled.
8.
Metadata
Commit: Commits the metadata runtime to the model.
9.
Prepare
Render: All the activities and the final page is sent to render.
Oracle 10g
Interview Questions and Answers
Ques:
13). What is the difference between Valuators and Converters?
Answer:
To
give conversion and validation capabilities to the ADF input components,
Valuators and Convertors are used.
After
the values on ADF forms are changed and submitted, converters convert the
values to the type that the application accepts.
Valuators
are used to enforce input component validations.
Ques:
14). What is Partial Page Rendering, and how does it work?
Answer:
PPR
(Partial Page Rendering) is quite similar to Ajax. PPR is a dynamic system that
takes appropriate action as needed. It triggers the page when it needs to be
triggered. It updates the page when it needs to. Once all of the activities are
in order, PPR submits the page.
You'll
need to do the following to allow partial page rendering:
Auto-submit:
When auto-submit is on or set to true, the page automatically submits the
values updated or changed on the page.
PartialSubmit:
When the partialSubmit is set to true, the changes and updates on the page
submit the page partially.
Partial
trigger: When the partial trigger is on, the page renders are simply listed.
Once the triggers are settled, final changes are considered.
Ques:
15). Is ADF a better framework than JSF?
Answer:
The
ADF framework is based on the JSF. When it comes to processing any business
application, ADF is quite smooth.
Let's
look at it from the user's perspective:
The
ADF possesses the following:
- The UI is simple and
straightforward to use.
- Even if they are
viewing it for the first time, anyone can readily access it.
- Almost everything is
in one location.
- The appearance and
feel are smooth and solid.
- From the developer's
perspective:
- It's a simple platform
on which to build an application.
- More than a hundred
components that are ready to use
- Components that can be
edited to alter the functionality
- Simple to keep up with
- Simple to set up
- Simple to use
- Drag and drop
functionality is available.
As ADF
is built on JSF, any time ADF will give you a nicer and smoother performance.
JSF is, nonetheless, a very good platform too. But when it comes to comparison,
ADF is better.
Ques:
16). What is the Role Of View Object, Entity Object, and Application Module?
Answer:
View
object: View objects show the modifications made by the user to Taskflows
projects. VO aids the system in sorting through the user's actions. And it
organises, filters, and maintains the task so that SQL queries may quickly
discover the results when they're looking for them.
Entity
object: In a database, an entity object is a row. EO is the ADF, similar to EJB
in J2EE. The values in the row are also easy to recognise with EO. It
encapsulated the entire row in a specific value. As a result, searching for any
value in the row becomes much easier. Even two EOs might be related to one
another and grouped together based on their relationship. Entity Associations
are a group of connected EOs.
An
application module allows a customer to access their work via the platform. AM
contains all of the essential and top-level processes, as well as the most
up-to-date information. AM is sometimes referred to as the transactional module
because it lets clients to access their own work. In the View link form, there
are also numerous VO and Entity Associates.
Ques:
17). What does it mean to be a Phase Listener?
Answer:
The
Oracle ADF lifecycle is fully integrated with the JavaServer Faces request
lifecycle, including everything needed to set up the binding context, prepare
the binding container, validate and update the ADF model, persist MDS changes,
and prepare the response.
An ADF
Phase Listener can be used by developers that need to listen to and engage with
the request cycle. The ADF Phase Listener, unlike the Phase Listener defined in
the faces-config.xml file, allows you to listen to both the standard and ADF
phases. Of course, the ADF Phase Listener is written in Java and configured in
the adf-settings.xml file you must generate.
The
ADF PagePhaseListener can be used in any situation.
Developers
can utilise either a conventional JSF listener or a particular ADF listener in
the Oracle ADF framework, which provides extra ADF-specific page cycle
enhancements. The ADF Lifcycle can be customised with listeners.
Ques:
18). What is inter-portlet communication, and how does it work?
Answer:
When
an action in one portlet causes a reaction in another, this is known as
inter-portlet communication. It serves as a link between two portlets. One
portlet, for example, has a checkbox with a list of products. When I select a
product from the list and press the submit button, the other portlet displays
the product's data.
Ques:
19). What is the meaning of Association Accessor?
Answer:
It's a
method for an entity instance at one end of an association to communicate with
the linked entity object instance at the other end. A source assessor travels
from the destination to the source, while a destination assessor travels from
the source to the destination.
It is
described in the entity object definition xml files, which can be used to
specify cross entity relationships by view object and view link definition. Its
return type is either the associated entity object definition's entity object
class or 'EntityImpl' if the associated entity object definition does not have
an entity object class.
Ques:
20). What are the various Bean Scopesin JSF types?
Answer:
Three
Bean Scopes are supported by JSF.
Request
Scope: The request scope is only valid for a certain time. It begins with the
submission of an HTTP request and finishes with the delivery of the response to
the client.
Session
Scope: From the time a session is formed until it is terminated, the session
scope persists.
Application
Scope: The application scope remains constant throughout the web application's
lifecycle. The scope of all requests and sessions is the same.
