What is the default length of the type P data type?

Which of the following rules must you follow when creating subscreens?
There are 2 correct answers to this question.
Response:

can you search for suitable classic Business Add-Ins(BAdIs)?
There are 2 correct answers to this question
Response:

You define a formal parameter to a subroutine that accepts only internal table of type standard and type sorted as actual parameters. Which of the following generic ABAP data types must you use?
Please choose the correct answer.
Response:

In an ABAP program, you to assign an initial value to an elementary data object when you define it. Which addition must you use?