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C++ Institute CPP Exam - Topic 2 Question 73 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 73
Topic #: 2
[All CPP Questions]

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

#include

#include

#include

#include

using namespace std;

void myfunction(int i) {

cout << " " << i;

}

bool classifier(int v) {

return v%2==0;

}

int main() {

int t[] = { 1, 5, 2, 5, 2, 4, 4, 3, 3, 1 };

vector v1(t, t+10);

set s1(t, t+10);

replace(v1.begin(), v1.end(),classifier, 10);

for_each(v1.begin(), v1.end(), myfunction);

return 0;

}

Program outputs:

Show Suggested Answer Hide Answer
Suggested Answer: C

by Johnetta at Oct 16, 2023, 09:48 AM

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Wilburn
4 months ago
Nah, it should just print the original array.
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Twila
4 months ago
I’m surprised it doesn’t throw an error!
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Amie
4 months ago
Wait, is `replace` even used correctly here?
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Christoper
4 months ago
I think it outputs option A.
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Jesse
4 months ago
Looks like it should compile fine.
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Aja
5 months ago
I think the output will be option A because it seems like the even numbers will get replaced by 10, but I'm not completely confident.
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Victor
5 months ago
I feel like this code should compile fine, but I'm worried about the output since `classifier` returns a boolean.
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Edwin
5 months ago
I remember practicing a similar question where we used `replace_if`, but I can't recall if it was the same as this one.
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Nadine
5 months ago
I think the `replace` function is supposed to replace elements based on a predicate, but I'm not sure if it works with a function like `classifier`.
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Devon
5 months ago
Ah, I see it now. The `replace()` function is modifying the vector `v1` in-place, so the output reflects the changes made to the vector. This is a good example of how to use the standard library functions effectively.
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Cordell
5 months ago
Wait, I'm a bit confused. Why is the output different from the original vector? I need to double-check how the `replace()` function works.
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Mabel
5 months ago
Okay, I think I've got this. The `replace()` function is replacing the elements in `v1` that satisfy the `classifier` function with the value `10`. Let me work through the output.
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Kandis
5 months ago
Hmm, this looks like a tricky one. I'll need to carefully read through the code and think through the logic step-by-step.
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Kallie
5 months ago
Hmm, not sure about this one. I'll have to think through the different factors the firm might have considered in making this decision. The key is figuring out which reason is the most likely.
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Izetta
5 months ago
Okay, I think I've got this. The default scope for Spring beans is singleton, so there should only be one AccountRepository bean instantiated, regardless of how many times the method is called. I'll go with option A.
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Terry
6 months ago
I remember reading that handling brute force attacks requires immediate action, but I'm not sure if updating passwords is the only step we should take.
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Nell
10 months ago
Whoa, hold on a second! If the replace function is using a predicate, then the answer should be D. The predicate function checks if the number is even, and the replace function replaces those even numbers with 10. So the output will be 10 5 2 5 2 4 4 3 3 10.
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Delmy
9 months ago
You're right, the output will be 10 5 2 5 2 4 4 3 3 10.
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Emile
9 months ago
Actually, I believe the correct answer is D.
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Juan
9 months ago
I think the answer is A.
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Man
10 months ago
Hold on, I think there's a catch here. The replace function takes a predicate function as its third argument, not a value to replace with. So this code won't even compile. The answer is C, compilation error.
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Janet
9 months ago
Yes, that's correct. The code won't compile because of the incorrect argument in the replace function.
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Muriel
9 months ago
Oh, so the correct answer is C) compilation error then.
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Asuncion
9 months ago
I think you're right, the code won't compile because the replace function is expecting a predicate function.
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Ozell
10 months ago
I'm pretty sure the answer is B. The replace function replaces the even numbers with 10, but it doesn't preserve the original order of the elements. So the output should be 1 10 2 5 2 4 4 3 3 10.
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Janna
11 months ago
I'm not sure, but I think there might be a compilation error.
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Meghann
11 months ago
The output should be D. The replace function replaces all even numbers with 10, so the output should be 10 5 2 5 2 4 4 3 3 10.
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Ollie
10 months ago
D) 10 5 2 5 2 4 4 3 3 10
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Nana
10 months ago
C) compilation error
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Jess
10 months ago
B) 1 10 2 5 2 4 4 3 3 10
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Colette
10 months ago
A) 10 5 2 5 2 4 4 3 3 1
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Gianna
11 months ago
I believe it will output D.
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Janna
11 months ago
I think the answer is B.
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