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C++ Institute CPP Exam - Topic 8 Question 76 Discussion

What happens when you attempt to compile and run the following code?#include #include #include using namespace std;templatestruct Out {ostream & out;Out(ostream & o): out(o){}void operator() (const T & val ) { out
E) compilation error
A) 3 2 4 1 5 6 8 2 1 0
B) 1 2 3 4 5 6 8 2 1 0
C) 1 1 2 2 3 4 5 5 6 8
D) 1 2 3 4 5 6 8 0 0 0

C++ Institute CPP Exam - Topic 8 Question 76 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 76
Topic #: 8
[All CPP Questions]

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

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

int main() {

int t1[]={3,2,4,1,5};

int t2[]={5,6,8,2,1};

vector v1(10);

sort(t1, t1+5);

sort(t2, t2+5);

set_union(t1,t1+5,t2,t2+5,v1.begin());

for_each(v1.begin(), v1.end(), Out(cout));cout<

return 0;

}

Program outputs:

Show Suggested Answer Hide Answer
Suggested Answer: E

by Junita at Dec 26, 2023, 07:00 PM

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Krystal
8 months ago
Definitely not a compilation error, so E is wrong.
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Melina
8 months ago
Wait, why are there two 1s? That seems off.
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Timothy
8 months ago
I think it should be option D, right?
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Dierdre
9 months ago
It outputs 1 1 2 2 3 4 5 5 6 8.
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Jani
9 months ago
The code compiles fine.
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Naomi
9 months ago
I feel like the output might be option D, but I can't recall if the vector gets filled with zeros after the unique elements.
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Arlette
9 months ago
I'm a bit confused about the vector size. Will it actually hold all the unique elements from both arrays?
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Carlee
9 months ago
I remember something about `set_union` needing a sorted range, so I guess it should work with the sorted arrays.
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Kanisha
10 months ago
I think the code should compile fine since all the included libraries are correct, but I'm not sure about the output.
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Refugia
10 months ago
This seems straightforward enough. I'll just need to carefully read through the code and the output options to determine the correct answer.
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Lelia
10 months ago
I'm a bit confused by the use of the `Out` struct. I'll need to make sure I understand how that's being used to print the vector elements.
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Gail
10 months ago
Okay, let me think this through step-by-step. The code is sorting two arrays, then using set_union to combine them into a vector. I'll need to pay close attention to the order of the elements in the final output.
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Rosendo
10 months ago
Hmm, this looks like a tricky one. I'll need to carefully trace the logic of the code to figure out what's happening.
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Devora
10 months ago
Ah, I see what's going on now. The key is understanding how `set_union` works and how it handles duplicate elements. I think I've got this!
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Jerry
10 months ago
I'm a bit confused by the wording of this question. Are the switches using Layer 3 protocols to eliminate collisions? Or do the ports themselves act as independent collision domains? I'll have to review my notes to be sure.
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Kimberlie
10 months ago
This question seems straightforward, I think I can handle it.
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Margarett
10 months ago
I'm leaning towards the configure terminal action, but I honestly can't recall if that's the right approach for overriding events.
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Berry
1 year ago
Option E? Seriously? The only error here is the person who wrote this exam question. They must have been coding in COBOL or something.
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Ryann
1 year ago
Option D? Really? That's just nonsense. This code is clearly working correctly, and the output should be option A or B.
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Elvera
1 year ago
Haha, option C is a good one! The code must be broken if it's printing the elements in reverse order. Maybe the programmer is a time traveler.
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Lavonna
1 year ago
User1: Or maybe they wanted to test our attention to detail.
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Elmira
1 year ago
User3: It could be a logical error causing the reverse order.
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Jaleesa
1 year ago
User2: Maybe the programmer made a mistake in the code.
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Zack
1 year ago
User1: Yeah, option C is pretty funny.
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Kimberely
1 year ago
I think option B is the correct answer. The set_union function should return the unique elements from both arrays, and the output seems to be in the correct order.
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Eleonora
1 year ago
Looks like the code is working fine then. Option B it is.
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Leota
1 year ago
Yes, I agree. The set_union function should return unique elements in order.
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Laura
1 year ago
I think option B is the correct answer.
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Lacey
1 year ago
The output should be option A. The set_union function correctly merges the two sorted arrays and stores the result in the vector v1.
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Candida
1 year ago
E) compilation error
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Hershel
1 year ago
The output is correct because set_union merges the sorted arrays t1 and t2 into v1.
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Dorethea
1 year ago
A) 1 2 3 4 5 6 7 8 9 10
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Arthur
1 year ago
I'm not sure about the syntax error, but I think the output should be A) 1 2 3 4 5 6 7 8 9 10 because the code is sorting and merging two arrays into a vector.
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Ranee
1 year ago
I agree with Kiera, the code is missing a semicolon after 'ostream & out'. So, the correct answer should be E) compilation error.
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Kiera
1 year ago
I think the answer is E) compilation error because there seems to be a syntax error in the code.
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Jillian
1 year ago
But the code is sorting and merging arrays, so I think it's E.
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Lynna
1 year ago
I disagree, I believe the answer is B.
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Jillian
1 year ago
I think the answer is A.
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