Functional Global Variable in the CLAD sample Exam

[MathieuPerrin]

Hello,

A question in the CLAD sample exam #2 keeps puzzling me. It's question number 32 about FGVs:

32. Which is not an important part of creating a Functional Global Variable?
a. Using Shift Registers to store information
b. Changing the VI’s execution settings to Reentrant
c. Setting the VI to inline into calling VIs
d. Setting the While Loop to stop after one iteration

The answer given is the following

32.Correct Answer: B

Topic: Functional Global Variables

Justification: It is not necessary to inline functional global variables into their calling VIs. In fact, inlining requires that the subVI be reentrant, which is forbidden for functional global variables.

Clearly, for an FGV to work properly, the VI must NOT be reentrant. So I would have selected answer B, but the justification seems to clearly point to answer C as well, doesn't it? Is it a typo, a subtlety in the wording? I am stuck on this one!

[crossrulz · Accepted solution]

Well, inlining requires reentrant.  Therefore, the best answer should technically be C.  This looks like one of those rejected/retired questions since it isn't quite right and/or left up to too much interpretation.

[DailyDose · Accepted solution]

It looks like, according to the justification, that the answer is C.  The justification is clearly talking about inlining and just so happens to mention why inlining is not possible.  Because a FGV cannot be reentrant.  I worked with a guy who worked on the NI CLAD questions and he told me this sort of thing happens too frequently.  The "Lower on the totem poll" people work the CLAD questions.  (hearsay) So, that sort of thing can be very discouraging when preparing for your test.  Even taking your test for that matter.  Because you cannot dispute questions you believe are correct like you can on a college exam.  Anyways, good luck!

[User002]

Maybe it's the language barrier, but I think the wording "which is not important?" asking for something that's explicitely forbidden is very poor.