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SAP Exam C_ABAPD_2309 Topic 3 Question 37 Discussion

Actual exam question for SAP's C_ABAPD_2309 exam
Question #: 37
Topic #: 3
[All C_ABAPD_2309 Questions]

Refer to the exhibit.

with which predicate condition can you ensure that the CAST will work?

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Suggested Answer: C

The predicate condition that can be used to ensure that the CAST will work is IS INSTANCE OF. The IS INSTANCE OF predicate condition checks whether the operand is an instance of the specified class or interface. This is useful when you want to perform a downcast, which is a conversion from a more general type to a more specific type. A downcast can fail if the operand is not an instance of the target type, and this can cause a runtime error.Therefore, you can use the IS INSTANCE OF predicate condition to check whether the downcast is possible before using the CAST operator12. For example:

The following code snippet uses the IS INSTANCE OF predicate condition to check whether the variable g_super is an instance of the class lcl_super. If it is, the CAST will work and the variable g_sub1 will be assigned the value of g_super.

DATA: g_super TYPE REF TO lcl_super, g_sub1 TYPE REF TO lcl_sub1. IF g_super IS INSTANCE OF lcl_super. g_sub1 = CAST #( g_super ). g_sub1->method( ... ). ENDIF.

You cannot do any of the following:

IS SUPPLIED: The IS SUPPLIED predicate condition checks whether an optional parameter of a method or a function module has been supplied by the caller. This is useful when you want to handle different cases depending on whether the parameter has a value or not.However, this predicate condition has nothing to do with the CAST operator or the type of the operand12.

IS NOT INITIAL: The IS NOT INITIAL predicate condition checks whether the operand has a non-initial value. This is useful when you want to check whether the operand has been assigned a value or not.However, this predicate condition does not guarantee that the CAST will work, because the operand may have a value but not be an instance of the target type12.

IS BOUND: The IS BOUND predicate condition checks whether the operand is a bound reference variable. This is useful when you want to check whether the operand points to an existing object or not.However, this predicate condition does not guarantee that the CAST will work, because the operand may point to an object but not be an instance of the target type12.


by Kina at Mar 08, 2025, 07:42 AM

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Nobuko
16 days ago
Haha, this question is making my head spin! But I think the answer is B) IS NOT INITIAL. Gotta play it safe, you know?
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Brandee
20 days ago
Ooh, a tricky one! I'm going to go with B) IS NOT INITIAL. Gotta make sure that variable has something in it before we try to CAST it.
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Luisa
6 days ago
I think you're right, B) IS NOT INITIAL makes sense to ensure the CAST will work.
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Irma
9 days ago
I think B) IS NOT INITIAL is the correct option.
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Gladys
23 days ago
Hmm, I'm not sure. Maybe D) IS BOUND? That would check if the variable has a value assigned to it, right?
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Kanisha
25 days ago
I think the answer is B) IS NOT INITIAL because it checks if the data object is initial or not.
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Wei
29 days ago
I'm going with C) IS INSTANCE OF. That way, we can check if the variable is of the right data type before trying to CAST it.
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Lindsey
1 months ago
I think the answer is B) IS NOT INITIAL. The CAST will only work if the variable is not initial, so that's the safest way to ensure it.
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Alex
14 days ago
I'm not sure, but I think D) IS BOUND could also be a valid option to ensure that the variable is bound before casting.
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Augustine
17 days ago
I think C) IS INSTANCE OF might also work, as it checks if the variable is an instance of a specific class before casting.
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Karl
18 days ago
I agree, B) IS NOT INITIAL is the correct answer. It ensures that the variable is not initial before performing the CAST operation.
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Alaine
1 months ago
I'm not sure, but I think it might be A) IS SUPPLIED.
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Reita
1 months ago
I disagree, I believe the correct answer is D) IS BOUND.
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Ammie
1 months ago
I think the answer is C) IS INSTANCE OF.
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