Exam MB-500 topic 3 question 39 discussion

Actual exam question from Microsoft's MB-500

Question #: 39
Topic #: 3

You are a Dynamics 365 Finance developer. You have the following Extended Data Types (EDTs):

You plan to modify properties of the EDTs by using an extension.
You need to determine which operations can be performed.
Which operation is possible?

A. Create a derived EDT for AccountId and decrease the field size.
B. Create an extension for AccountId and increase the field size.
C. Create an extension for AccountId and decrease the field size.
D. Create an extension for AccountBase and increase the field size.

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Suggested Answer: D 🗳️

by LidiaRF at Sept. 16, 2022, 5:23 a.m.

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globeearth

3 months ago

Selected Answer: D

A is derived so it not a choice at all. Options B, C, D also will not work : -> These involve schema-affecting changes, which are not permitted in EDT extensions. -> Increasing or decreasing StringSize requires database schema changes (e.g., altering column sizes in tables like CUSTTABLE or VENDTABLE), which risks data integrity (especially for decreases) and is not supported by the extensibility framework. -> For AccountId (B, C), the inheritance from AccountBase further constrains field size changes, as the derived EDT’s size cannot deviate from the parent’s in an extension. -> For AccountBase (D), the impact is broader, affecting all derived EDTs and tables, making it equally unsupported.

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