cl_gui_alv_grid
2) Define Polymorphism.
It's one of the main strengths of
inheritance.
The same method is implemented
in different ways by redefining the method in subclasses.
It's a characteristic when objects
from different classes react differently to the same method call.
3) What is the only component that is implemented in the implementation part of a class.
Method.
4) What is contained in a class that does not exist in an interface.
Implementation.
5) Where would the components of a class be define.
Definition part of a class.
6) Global class cl_course has been defined using the class builder. The development class is ZCL. What is the key entry in the repository table TADIR.
R3TR CLASS cl_course.
7) Your program has register several handler methods. How does the program know what methods are available for executing when an event is triggered?
The system looks for registered handler methods In the event handler internal table and processes those that are registered for the event
8) Static method and instance method.
Instance methods MUST be addressed
by object ref after instantiation
Static methods MUST be addressed
by class_name even when object is instantiated
9) Characteristics of the self-reference ME.
Self-references allow an object
to give other objects a reference to it.
The reference ME can be used to
determine the dynamic type of the reference variable in the debugger.
The self-reference ME can be used
to access individual components.
10) Primary difference between function and object.
Calling a function loads the entire
function group implicitly into memory whereas instances of an object are
generated explicitly when an object is created.
A program can only work with a
single instance of the same function group versus a program can access
several instances of the same object.
11) What can be said about the lifetime of an object?
An object exists for as long as
it is being used in the program.
An object exists as long as at
least one reference points to it.
An object exists as long as at
least one method of the object is registered as an event handler.
12) Global class
Class Builder can be used to test
global classes.
Access to a global class is done
as a reference variable using TYPE REF TO
Global classes are stored in TADIR
with key R3TR CLASS
A method to be transported is identified
in transport organizers as LIMU METH
13) What implications exist when private components of a class are changed?
Programs are insulated from change
14) Mark the invalid attribute definitions.
class lcl_course definition.
10 public section.
20 Data: school(20)
type c,
30
Supervisor type string value 'ADAMS',
40
Price(3) type p decimals 2 value 100 READ-ONLY.
50 types: type_category(15)
type c,
60
type_name(10) type c.
70 constants: write_position
type i value 10.
80 class-data: course_count
type i.
90 private section.
100 data: category(15)
type c,
110
name(10) type c.
120
courseid like mara-matnr.
endclass.
15) When method of Class CL_GUI_ALV_GRID would be used to display the contents of an internal table?
SET_TABLE_FOR_FIRST_DISPLAY
16) What statement will request memory to be allocated to an object?
Create Object
17) How can the values of an attribute be set in an object?
When the object is created and values
are implicitly exported to the Constructor Method
Using the VALUE statement will
set the value of an attribute when the object is created
18) Items that are not part of the Event character.
Events also allow RETURNING parameters.
EXPORTING Parameters for events
can only be passed by reference.
