Where are fixed values for fields stored?

What are the elements of ABAP Database Integration? There are 3 correct answers to this question.

There are ____ versions of the ABAP Editor.
Please choose the correct answer.
Response:

You r program performs a data base update by calling function modules in an update task.
Which ABAP statements can be used in the program to discard all update requests for the current SAP logical unit of work(LUW)?
There are 3 correct answers to this question
Response:

When must a foreign key have domain equality?