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C++ Institute CPA-21-02 Exam - Topic 1 Question 11 Discussion

What happens when you attempt to compile and run the following code?#include #include using namespace std;class myClass : public exception{virtual const char* what() const throw(){return "My exception.";}} obj;int main () {try{throw obj;}catch (exception& e){cout
B) It prints: 0
A) It prints: My exception.
C) It prints: 1
D) Compilation error

C++ Institute CPA-21-02 Exam - Topic 1 Question 11 Discussion

Actual exam question for C++ Institute's CPA-21-02 exam
Question #: 11
Topic #: 1
[All CPA-21-02 Questions]

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

#include

#include

using namespace std;

class myClass : public exception

{

virtual const char* what() const throw()

{

return "My exception.";

}

} obj;

int main () {

try

{

throw obj;

}

catch (exception& e)

{

cout << e.what() << endl;

}

return 0;

}

Show Suggested Answer Hide Answer
Suggested Answer: B

by Mozell at Mar 17, 2024, 12:25 PM

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Carylon
7 months ago
Nope, it works just fine as is!
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Shannon
7 months ago
I thought exceptions needed to be caught differently.
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Adelina
7 months ago
Wait, is there a chance of a compilation error?
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Kanisha
8 months ago
Totally agree, that's the expected output!
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Ricarda
8 months ago
It prints: My exception.
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Dannie
8 months ago
I’m a bit confused about the `throw` statement. Does it really throw the object correctly, or could that cause a compilation error?
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Levi
8 months ago
This kind of question seems familiar; I feel like it should print "My exception." based on how exceptions work.
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Franklyn
8 months ago
I'm not entirely sure, but I remember something about the `what()` function needing to be overridden properly.
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Shawna
9 months ago
I think the code should compile fine since it follows the correct syntax for exceptions.
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Louvenia
9 months ago
This looks straightforward. The code creates a custom exception class `myClass` that inherits from `exception`, and then throws an instance of that class. Since the `catch` block is catching `exception&`, it should print the message from the overridden `what()` function, which is "My exception.". I'll select option A.
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Precious
9 months ago
Hmm, I'm a bit confused by the inheritance from `exception` here. Does that mean the `myClass` exception will be caught by the `catch (exception& e)` block? I'll need to double-check the exception handling rules to be sure.
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Gabriele
9 months ago
This looks like a question on exception handling in C++. I think the key is to understand how the `exception` class and its derived classes work. Let me carefully read through the code and think it through.
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Nana
9 months ago
Okay, I think I've got it. The `myClass` exception is derived from `exception`, so it should be caught by the `catch (exception& e)` block. And since the `what()` function is overridden to return "My exception.", that's what should be printed. I'll go with option A.
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Maxima
9 months ago
I'm not totally sure about this one. The question mentions the user's role and permissions, but I'm not sure how that impacts their ability to access the data.
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Marget
9 months ago
Okay, I think I've got this. Since the end user needs to be able to modify the blueprints, they would need more permissions than the basic Consumer role. The Operator role seems like it would give them the necessary access to make the required changes.
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Mariann
1 year ago
Wait, does this mean I can create my own exception classes and throw them around like candy? That's kind of awesome, if you ask me. Though I bet the compiler's gonna have a field day with all those custom exceptions flying around.
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Annamae
1 year ago
User3: The compiler might not like all those custom exceptions.
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Soledad
1 year ago
User2: It prints: My exception.
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Isadora
1 year ago
User1: Yes, you can create your own exception classes.
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Lenny
1 year ago
Haha, this one's a classic tricky C++ question. I bet a lot of people are going to overthink it and pick the wrong answer. But not me! I'm sticking with A - it's gotta be the custom exception message, no doubt about it.
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Angella
1 year ago
Okay, let's see. We're throwing a custom exception, and the catch block is set up to handle exceptions of type exception&. I'm pretty sure that means it'll print the custom message, so I'm going with A as well.
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Sharmaine
1 year ago
Yes, A seems to be the correct choice.
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Myra
1 year ago
So, we're all going with option A then?
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Fletcher
1 year ago
I agree, it should print the custom message.
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Merrilee
1 year ago
I think it prints: My exception.
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Alease
1 year ago
Hmm, let me think this through. The code is throwing a custom exception, so it should print the message we defined in the what() method. I'm going to go with A on this one.
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Robt
1 year ago
Ah, the classic C++ exception handling question! This one's a breeze - the answer is clearly A. The code creates a custom exception class and throws an instance of it, which the catch block then properly handles and prints the expected message.
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Melvin
1 year ago
I agree, the answer is definitely A.
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Colby
1 year ago
A) It prints: My exception.
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Amber
1 year ago
I'm not sure, but I think D) Compilation error could also be a possibility if there is an issue with the code.
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Rima
1 year ago
I agree with Cordelia, because the code defines a custom exception class and throws an object of that class.
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Cordelia
1 year ago
I think the answer is A) It prints: My exception.
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