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C++ Institute CPA-21-02 Exam - Topic 2 Question 48 Discussion

Actual exam question for C++ Institute's CPA-21-02 exam
Question #: 48
Topic #: 2
[All CPA-21-02 Questions]

What is the output of the program?

#include

#include

using namespace std;

union t

{

char c;

int i;

};

class First

{

union t u;

public:

First() {

u.c = 'A';

}

void Print(){

cout << u.c;

}

};

int main()

{

First *t = new First();

t?>Print();

}

Show Suggested Answer Hide Answer
Suggested Answer: B

by Kris at Jan 05, 2026, 05:16 AM

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Becky
2 days ago
Wait, isn't there a chance of a garbage value?
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Tijuana
7 days ago
Definitely B, no doubt!
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Layla
12 days ago
It prints: A
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Dominga
18 days ago
Lol, the program will probably just print a random garbage value. You can't trust unions!
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Dion
23 days ago
Haha, I bet the compiler will throw a fit and give us a compilation error. D all the way!
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Albina
28 days ago
Definitely B. The union will initialize the 'c' member to 'A'.
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Kenneth
2 months ago
Hmm, I'm not sure about this one. Could be B or C.
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Kimberlie
2 months ago
I'm pretty sure the answer is B. It prints 'A'.
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Irma
2 months ago
The output should be 'A'.
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Laurel
2 months ago
I feel like there might be a compilation error due to the way the Print function is called with the arrow operator.
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Billi
2 months ago
I practiced a similar question, and I think it should print 'A' because the Print function directly accesses the character.
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Danica
2 months ago
I'm not sure, but I remember something about unions that might cause a garbage value if not handled properly.
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Cordie
3 months ago
I think the output should be 'A' since the constructor initializes the union with 'A'.
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Beatriz
3 months ago
I've got it! The union will store the 'A' character, but when we print it, it will print the ASCII value 65 instead of just the character. The answer is C.
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Tyra
3 months ago
I'm not sure about this one. The question mentions "output of the program", so it might be related to how the program is executed, not just the union.
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Paulene
3 months ago
Okay, let me think this through. The union has a char and an int member, and the First class initializes the char member to 'A'. So the output should be just 'A'.
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Joesph
3 months ago
Hmm, I'm a bit confused about unions. Do they store multiple values at the same time or just one?
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Royce
4 months ago
I think I can handle this one. The key is understanding how unions work in C++.
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