C++ Institute CPP Exam - Topic 2 Question 114 Discussion

Actual exam question for C++ Institute's CPP exam

Question #: 114
Topic #: 2

[All CPP Questions]

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

#include

using namespace std;

int main ()

{

int t[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

vector v1(t, t + 10);

deque d1(v1.begin(), v1.end());

deque d2;

d2 = d1;

d2.insert(d1.rbegin(), 10);

for(int i = 0; i

{

cout<

}

return 0;

}

Aprogram outputs: 0 1 2 3 4 5 6 7 8 9 10

Bprogram outputs: 10 0 1 2 3 4 5 6 7 8 9

Cprogram outputs: 0 1 2 3 4 5 6 7 8 9

Dcompilation error

Show Suggested Answer

Suggested Answer: D

by Virgilio at Oct 30, 2025, 03:18 PM

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Onita

1 day ago

I feel like it should be option A. The insert adds 10 at the end.

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My

7 days ago

I think it outputs 0 1 2 3 4 5 6 7 8 9.

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Hubert

12 days ago

No compilation errors here!

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Franklyn

17 days ago

I disagree, it should show 10 at the start.

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Rocco

22 days ago

Wait, I thought it would include the 10!

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Shawana

27 days ago

It outputs 0 1 2 3 4 5 6 7 8 9.

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Skye

1 month ago

The program compiles fine.

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Jeffrey

1 month ago

Wait, is this a trick question? I'm going to go with option B, just to be safe.

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Jessenia

1 month ago

Haha, the code looks like it was written by a monkey. I bet the correct answer is C, just to mess with us.

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Marjory

2 months ago

D. There must be a compilation error because the deque header is not included.

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Kip

2 months ago

I’m leaning towards option C because I think the insert doesn’t affect the output of d1, but I could be wrong.

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Catalina

2 months ago

I feel like the insert operation adds 10 to the front of the deque, so maybe it will print 10 first? But I’m not confident about that.

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Misty

2 months ago

The program should output 0 1 2 3 4 5 6 7 8 9 10, so the correct answer is A.

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Ceola

2 months ago

I remember a similar question where we had to deal with vectors and deques. I think the output might include the number 10 at the beginning, but I can't recall exactly.

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Elli

3 months ago

I think the correct answer is B. The insert method adds the element to the beginning of the deque.

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Marylin

3 months ago

I think the code should compile fine since all the included libraries are correct. But I'm not sure about the output after the insert operation.

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Dewitt

3 months ago

This looks straightforward to me. The insert() function on the deque is inserting the value 10 at the end of d1, so the output should be B.

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Kate

4 months ago

I'm not too sure about this one. I'll need to walk through the code step-by-step to figure out what's happening. Hopefully I can eliminate some of the options and make an educated guess.

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Vernell

4 months ago

Okay, I think I've got this. The key is that we're copying the deque d1 into d2, and then inserting an element at the end of d1 using the reverse iterator. So the output should be B.

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