Webdynpro ABAP, SAP Web Dynpro for ABAP, Webdynpro Interview Questions, SAP WDA is the standard SAP technology to develop the web based applications using the SAP's standard programming language called ABAP/4. Here in this post we are going to provide real time interview questions and answers on SAP Webdynpro ABAP. These real time interview questions are helpful for the ABAPer's who are going to attend interviews on Web Dynpro ABAP. Refer this post for more details and real time interview questions on SAP Webdynpro ABAP. Click on read more to read this article.
SAP Webdynpro ABAP Real Time Interview Questions
SAP Webdynpro ABAP Real Time Interview Questions and Answers-3, SAP Webdynpro ABAP, SAP Web Dynpro for ABAP, SAP WDA is the standard SAP technology to develop the web based applications using the SAP's standard programming language called ABAP/4.
Here in this post we are going to provide real time interview questions and answers on SAP Webdynpro ABAP. These real time interview questions are helpful for the ABAPer's who are going to attend interviews on Web Dynpro ABAP. Refer this post for more details and real time interview questions on SAP Webdynpro ABAP.
Webdynpro ABAP Interview Questions and Answers
Webdynpro Interview Questions : Part-1
Webdynpro Interview Questions : Part-2
40) Explain
the concept of OVS and its usage?
WDR_OVS
is the standard webdynpro component to generate F4 helps for the input field. OVS refers to
Object value selector.
41) How can
you use Radio Buttons/Checkboxes/Dropdown lists in webdynpro?
Radio buttons/Checkboxes are used for objective selection
similar to what is available
in SAPGUI.
An event is
associated with each UI element for on click action.
42) Explain FPM
concept and its usage in
webdynpro?
->>>>Refer to the link
43) What is internationalization? What is the use of it in webdynpro abap application?
Internalization
refers to creation of texts used in
webdynpro application in a specific language and providing option to translate to multiple
languages if necessary.
This is achieved by using OTR's or text elements for static texts and performing translation when required.
44) What is
Cardinality of a context node in webdynpro?
Cardinality refers to number of elements a
node can accommodate during run time.
When a node is
created the cardinality is assigned to it. Cardinality is of the following
kinds:
0:1 --> At
run time, no element or maximum one element can be instantiated
0:n --> At
run time, no element or maximum of n elements can be instantiated
1:n --> At run time, minimum one element or maximum of n elements can be instantiated
1:1 --> At
run time, only one element should always be instantiated if you
try violating the cardinality there would be a short dump saying Number of elements of the collection of
node node_name violates the cardinality
45) What is Personalization in abap webdynpro application?
Personalization refers to changing the properties
of UI elements at runtime.
Personalization
settings are user specific. Configuration controller is used for personalization function.
ex: Changing
the order of columns in a table display.
46) What are the controller types in webdynpro ABAP?
-Component
Controller
->Component Controller is global part of the component and each component has
only one component controller.
Global
Attributes and methods required by the component can be defined here.
-Custom
Controllers
->Custom controllers are defined during design time and these are optional.
The visibility
Custom controllers are in the entire component and have the life time equal to
life time of the component.
Custom
controllers are used if a set of views have to be grouped to perform special
function or hold a set of data.
-View
Controller
->Flow
logic of the views is in view
controller and a view can have only one view controller.
The visibility
of View controller is specific to view only.
-Configuration
Controller
->Configuration
controller is used achieve
personalization function.
-Window
Controller
->A window
controller exists for each window and can
also have methods to write coding logic.
Every window will have the default method and it is used
to receive parameters.
The windows controllers are visible in entire
component and also in the custom controller.
47) What are Layout types in Webdynpro and its usage?
->Flow Layout:
Used for sequential display of WD UI
elements.
->Row Layout:
here each UI element is displayed on its own
column and the width differs from row to row. Row head data is used to insert
a break.
->Grid Layout:
UI elements are arranged based the no of
columns. line breaks are inserted based on the size.
->Matrix Layout:
Matrix layout arranges UI elements in
columns. Matrix head data is used to insert a line break.
Usage of the appropriate layout to build a webdynpro
application is determined during the UI design.
48) What is supply function method in SAP Webdynpro?
->Supply function method is used to populate the context node
or to default values to the context node elements.
Supply function method is
called before the node is accessed for first read.
->Using supply function method is optional
49) What is singleton property of context node?
->Singleton property is one of the attributes of the context
node if this is set there can be only one instance of
the respective context node at runtime.
50) How to default a value to the context attribute?
In the context attribute
there is a property to set the default value.
Use the same; however the default value can be
overwritten using the set_attribute method of the
interfaceif_wd_context_element.
51) Is it possible to pass parameters to webdynpro
URL?
Yes you can pass parameters to webdynpro URL and it is passed as
below.
For ex: your url is
http://server.com/wd_url_name?sap-system-login-basic_auth=X&sap-client=800&sap-language=E
Here the parameter values are passed for
sap-system-login-basic_auth,
sap-client and sap-language.
52).What is the
difference between narrowing cast and widening cast?
If we copy an instance
of sub class to super class it is called narrowing cast and the vise
versa of it is widening cast.
53).Is model used
in Webdynpro ABAP?
The webdynpro ABAP
Graphical tool set doesn’t give any option to create model.
We can define a
class in transaction SE24and the instance of that class can be used
as model within the Wedbynpro code.
54). What are
the different ways of getting data from a table and pass it to
Webdynpro context node?
Ans.
a. select the data to
an internal table and pass it to the node using bind table method
b. use a
model class instance to get data
c. use the service
call option provided by webdynpro framework
55). What is the
Service call option in Webdynpro ABAP?
Webdynpro ABAP
Graphical toolset gives a wizard which automatically generates the code
for calling a BAPI or Web service.
This wizard will
create a custom controller which has context nodes or attributes similar
to the parameters of BAPI and a method which calls the BAPI and pass
the value to the context.
We only need to use this custom
controller within another controller, map the context and call the method.
56).What is
an Application?
An application forms
as the link between a component and URL.
57).What is
a faceless component?
Faceless components
are webdynpro components without window or view
58). In case of a
component used within a component, how does parent component communicate to
child component?
Parent component
communicate with the child component through Interface controller and Interface
view of the child component.
59). Interface View of
a component has 1:1 relationship with what?
The window of the
component
60).What are the
actions in a view controller?
The methods that can
be linked to the UI elements of a view are called actions.
61).What is role of
plugs in views?
Plugs in views help
the navigation between views. Navigation happens through the link created
between outbound plug of a view to the inbound plug of next view.
For More Real Time Interview Questions:
Dear ABAPer's if you know any SAP Webdynpro ABAP interview questions please leave a comment in below comment box, it'll helpful for the fellow readers.
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