C++ Institute Exam CPA-21-02 Topic 1 Question 37 Discussion

Actual exam question for C++ Institute's CPA-21-02 exam

Question #: 37
Topic #: 1

[All CPA-21-02 Questions]

What happens when you attempt to compile and run the following code?

#include

using namespace std;

class A {

int x;

protected:

int y;

public:

int z;

A() { x=1; y=2; z=3; }

};

class B : public A {

public:

void set() {

y = 4; z = 2;

}

void Print() {

cout << y << z;

}

};

int main () {

B b;

b.set();

b.Print();

return 0;

}

AIt prints: 42

BIt prints: 44

CIt prints: 22

DIt prints: 2

Show Suggested Answer

Suggested Answer: A

by Van at Mar 21, 2025, 04:40 PM

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Alease

4 months ago

Ha! This is a classic trick question. The answer is obviously C) It prints: 22. Why, you ask? Because the protected member y is set to 4, and the public member z is set to 2. So when we print them, we get 42. Easy as pie!

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Yoko

3 months ago

No way, it prints: 22. Trust me on this one.

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Tula

3 months ago

I think you're mistaken. It actually prints: 42

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Vincenza

4 months ago

I believe it prints: 44 too, because the Print function in class B outputs the values of y and z

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Claudia

4 months ago

Hmm, this is tricky. I'm going to have to think about it carefully. Wait, I've got it! The protected member y is accessible in the derived class, so we can modify it. And since z is public, we can also change its value. The output should be 44. I'll go with B) It prints: 44.

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Yvonne

2 months ago

So, the correct answer is B) It prints: 44.

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Kina

3 months ago

Yes, and since z is public, its value can also be changed.

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Bethanie

3 months ago

I agree, the protected member y can be modified in the derived class.

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Celestine

3 months ago

I think the output will be 44.

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Avery

4 months ago

I'm not sure, but I think it prints: 44 as well

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Pearly

5 months ago

I agree with Cammy, because the set function in class B changes the value of y to 4 and z to 2

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Cammy

5 months ago

I think it prints: 44

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Shayne

5 months ago

Okay, let's think this through. The default constructor of class A initializes x to 1, y to 2, and z to 3. In the set() function, we change y to 4 and z to 2. So the output should be 42. I'll go with B) It prints: 44.

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Daryl

5 months ago

Ah, a classic inheritance question. The protected member y is accessible in the derived class B, so we can modify it in the set() function. And since z is public, we can also change its value. The output should be 44. This is an easy one!

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Melina

5 months ago

Hmm, let's see. The code creates an object of class B, which inherits from class A. The set() function sets the value of the protected member y to 4 and the public member z to 2. The Print() function then prints the values of y and z. I think the answer is B) It prints: 44.

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