TAW_12 Chapter 2, Fundamental OO syntax

Question 1

What are the two ways to define exceptions in a method definition?

Answer 1

EXCEPTIONS
Exception NO_BOB “would set sy-subrc to 1
or
RAISING exception_class

Question 2

Old school functional methods had only returning and importing params

Answer 2

They now have exporting and changing

Question 3

In a class is it possible for an instance attribute to share a name with an instance method?

Answer 3

No, but a method can reuse an instance attribute

Question 4

In UML what is the prefix for public, private, and static attributes

Answer 4

\+ = public
- = private
_ = Static

Question 5

DATA: obj1 type ref to cl_bob,
obj2 like obj1

Is the above valid?

Answer 5

Yes

Question 6

DATA lcl_bob type ref to cl_name,
lcl_jim like lcl_bob
LCL_JIM = LCL_BOB
creates how many objects of type name?

Answer 6

Only one object exists and both lcl_bob and lcl_jim point to it

Question 7

Functional methods can be called in what expressions

Answer 7

Move, Case, Loop
If, While, Check, Wait until
Compute (this covers all math basically)

Question 8

An instance constructor can have what in it’s signature

Answer 8

Importing and Exceptions

Question 9

A class-constructor can have what in its signature

Answer 9

Basically nothing

Question 10

If I access a static attribute, is the class constructor called?

Answer 10

Yes!

Question 11

self reference is

Answer 11

me->

Question 12

me-> refers to…?

Answer 12

The instance/object reference. In the case where a instance attribute and local method attribute share the same name, me-> will point to the instance level component