topic FAQ's In abap Objects in Application Development and Automation Discussions

FAQ's In abap Objects

Former Member — Mon, 04 Jun 2007 06:31:29 GMT

Hi Guys,

I am having an interview tmmorrow in Abap Objects.

Could any one help me in sending me the Faq's ASAp.

Thanks in advance

Re: FAQ's In abap Objects

Former Member — Mon, 04 Jun 2007 06:41:30 GMT

Hi,

If you do a media search on ABAP Objects you will find:

1)Eight Reasons Why Every ABAP Developer Should Give ABAP Objects a Second Look by Horst Keller

https://sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/uuid/37c5db90-0201-0010-3a9b-d0a5288f3c15

2) Questions: Why use ABAP Objects

https://sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/uuid/3e59b790-0201-0010-88aa-bc8a7f95f6fb

3) Why use ABAP Objects Exercise

https://sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/library/uuid/3412d190-0201-0010-aaaa-ff5a315ae5fe

4) ABAP Objects for Java Developers:

https://media.sdn.sap.com/public/eclasses/teched04/ABAP151_files/Default.htm#nopreload=1

There is also an excellent class offered by SAP Education called BC401 that describes Objects and BADIs in exruciating detai ;-).

http://www8.sap.com/useducation/curriculum/course.asp?rid=276&cid=60167031

Check the links -

Regards,

Priyanka.

Re: FAQ's In abap Objects

Former Member — Mon, 04 Jun 2007 06:52:32 GMT

Hi Sagar,

One inevitable question is -

<b>What are similarities/dissimilarities with other object oriented languages?</b>

Check the following link for that.

https://www.sdn.sap.com/irj/sdn/docs?rid=/webcontent/uuid/1693f0b7-0701-0010-8187-931b02a5fbfb [original link is broken]

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/25a3df90-0201-0010-10b6-9712397c22fd

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/d86aaf90-0201-0010-9eb2-f3da5f446a22

Regarding dissimilarities you can say -

1. Destructors not available in ABAP unlike other OO languages.

2. Normal method overloading (changing both signature + implementation) not

possible in ABAP objects, only constructor can be overloaded in ABAP.

Check out following links also -

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/840ad679-0601-0010-cd8e-9989fd650822

Award points if found useful.

Regards

Indrajit.

Re: FAQ's In abap Objects

Former Member — Mon, 04 Jun 2007 07:35:42 GMT

Hi Sagar,

Some of the frequently asked questions in ABAP OO include:

1) Difference between interface and abstract class.

Ans: In an abstract class, atleast one method is not defined where as in an interface no method is defined ie all methods have to be redefined in the class that implements the interface.

2) What is narrowing cast?

Ans: If A is an object of a super class and B is an object of the child class, then,

the statement A = B is called narrowing cast. By doing this, the super class object A can access the public n protected members that the child class inherited from it and also the redefined methods of the child class.

3) By default, what is the visibility in a class?

Ans: Unless specified, the visibility in a class is private.

4) What is CLASS_CONSTRUCTOR? When is it called?

Ans: CLASS_CONSTRUCTOR is the static constructor of a class that is used to initialize the static attributes ( CLASS-DATA) of a class. It is called before the class is instantiated.

All the best!

Reward points if helpful.

Regards,

Renuka.