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 Interview Questions and Answers
SAP Webdynpro ABAP Real Time Interview Questions and Answers-1, 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 Real Time Interview Questions Answers
1)What are the Types of ABAP UI Technologies?
Ans: Webdynpro for ABAP, BSP
2)What are the MVC Architecture Concepts and usage of the
same in ABAP Webdynpro programming?
Ans: As per the MVC Architecture there is a
clear separation between flow logic, view and the Business Logic.
View holds all the UI elements that are visible in the UI,
Controllers have the flow logic.
Controllers are of different
kind (Component Controller, View Controller, and Window Controller).
Business logic is held in the Model which is in the form of
Assistance class in webdynpro context.
3)Tell me what is the Difference Between the View Container and the
Transparent? Container
Ans: View Container holds the views, there can be multiple views
assigned to the view container but only one view can
be active (viewed) at a time.
Transparent holds the webdynpro UI elements, A layout type can
be associated with it.
4) What does a Model Class Consists?
Ans: Model Class is the Assistance class in webdynpro.
It
contains the Business logic in the form of methods, Global data &
Constants in the form of Class Attributes.
The Model class can be accessed in webdynpro component
using the attribute wd_assist
Note: All the visibility properties of the Class
are applicable when accessing the class using the object wd_assist.
5) What is an Assistance Class and How it is instantiated in Webdynpro?
Ans: Assistance Class is the model class which would act as the
data provider for the webdynpro component and it is instantiated by
the webdynpro component during the run time and no explicit instantiation is required.
6)What are the Design Patterns in Webdynpro ABAP?
(GAF, OIF, QAF Etc)Refer to the link:
7) How do you debug an web based Application (It Could
be from ABAP Webdynpro, BSP or CRM Web UI)?
Ans: External break-points should be used to debug web
UI's.
8) How do you create a ALV Report/Editable ALV
in Webdynpro?
Ans:
->Add the Standard ALV
component to the web dynpro Component.
->Use Components tab:
Ex: ALV_MATS type SLV_WD_TABLE
->Create a context
node with the table field information to be displayed
->Write the ALV
Default Code for table display
->Set the read only
attribute to false to switch to editable mode using the method set_read_only of
the interface IF_SALV_WD_TABLE_SETTINGS implementing class CL_SALV_WD_CONFIG_TABLE).
9)Explain how do you navigate between Views in
Webdynpro?
Ans: Navigation between Views is through Plugs (Inbound and
Outbound),
10)What is the usage of Plugs in Webdynpro ABAP?
Ans: Plugs are used to Navigate between the views.
Parameters
can be passed using the plugs similar to interface parameters of function
module or a class method.
11) Describe usage of Webdynpro Component Controller?
Ans: Component controller is used to the store the Global
attributes and Methods of the component.
Attributes/methods declared in the component controller are
visible throughout the component and they are accessed using the
attribute wd_comp_controller outside of component controller (like views,windows
etc).
All the context nodes defined in the component controller
are visible in all the views and windows of the component.
Ex: if
a variable called gv_count is defined in the component controller, it can
be accessed in the view using the syntax
wd_comp_controller->gv_count.
12) How do you access a Context Nodes and Elements programmatically, Code required for accessing the Context Nodes can be
written using the webdynpro code wizard.
For Ex:
if there exists a Node Node1 with cardinality
1:1 and has 3 Attributes to it Att1, Att2,Att3.
The attributes can be accessed using the below code.
data:
lo_nd_node1 type ref to if_wd_context_node.
data: lo_el_node1 type
ref to if_wd_context_element.
data: ls_node1 type
wd_this->element_node1.lo_nd_node1 = wd_context
->get_child_node(
name = wd_this->wdctx_node1 ).lo_el_node1 =
lo_nd_node1
->get_element( ).**Read
Node1lo_el_node1
->get_static_attributes(importingstatic_attributes =
ls_node1 ).
**Write to
Node1lo_el_node1->set_static_attributes(exportingstatic_attributes =
ls_node1 ).
13) Message Areas in Webdynpro Message areas are created in
views to display messages (Error, Success, Warning, and Info).
WD allows having multiple Message errors in a view but throws an
error when the view is displayed. Use the code wizard to get code for
raising error messages.
Few of the message classes and methods are: Interface:
if_wd_message_manager.methods: report_t100_message.(used to report message from
the message class)
14)What is the concept of OTR (Online Text Repository) and its Usage?
OTR's
are similar to text elements in ABAP.
OTR's are created for UI texts and texts can be maintained
in multiple language.
OTR's can be created using the transaction: SOTR_EDIT
15)What is the concept of Interface Views?
If the views of a different
components are need to be used in a webdynpro component mark the view as interface
view and use it in another component.
It's similar to using a, include in a program.
An Interface view
of the component can be used in any number of components. This concept
supports the re usability of the views.
16)Explain the Sequence of Webdynpro?
Events:
Ex:
WDDOINIT,
WDMODIFYVIEW,
WDAFTERACTION,
WDBEFOREACTION etc
Sequence:
WDDOINIT of the component controller,
WDDOINIT of the Window Controller,
WDDOINIT of the View Controller,
WDMODIFYVIEW (On Input/Display on any UI Element).
WDBEFOREACTION (Method for validation of user input, Once
the user action happens on the UI)
WDAFTERACTION (Method for non-action
specific operations before Navigation)
WDDOEXIT (Exit from the View/Window/Component Controller)
WDPOSTPROCESSING (used to perform exception handling for
supply function methods)
17) Can a Component have Multiple Applications?
Yes, for a
given webdynpro component any number of applications can be created.
Applications are similar to transactions in SAP.
You can
associate different Interface views of the component to create different applications
using the same component.
18) How do you launch a Webdynpro Application from a Transaction?
19) How do you Navigate between two Webdynpro
Components?
You can use Interface views to navigate between components
or create a navigation class and do a explicit call.
20)Explain how do you create a tree in Webdynpro?
Tree UI element is used to
create Tree in Webdynpro.
Tree can be defined as part of the table column.
For More Real Time SAP ABAP Interview Questions:
SAP-Webdynpro-ABAP-Real-Time-Interview-Questions-Answers-1
SAP-Webdynpro-ABAP-Real-Time-Interview-Questions-Answers-2
SAP-Webdynpro-ABAP-Real-Time-Interview-Questions-Answers-3
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.
"You found the information helpful and want to say thanks? Your donation is enough to inspire us to do more. Thanks a bunch!"
Posted in: 
0 comments:
Post a Comment
Note: Only a member of this blog may post a comment.