Discuss C++ Institute CPP Exam Topic 4 Question 122

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

#include

using namespace std;

int main()

{

int t[] ={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

deque mydeck(t, t+10);list mylist(t,t+10);

queue first;

queue second(mydeck);

queue third(second);

queue > fourth(mylist);

mylist.clear();third.clear();

cout<

return 0;

}

Aprogram outputs: 10 0
10 0

Bprogram outputs: 0 0
0 0

Cprogram outputs: 10 10
10 10

Dprogram outputs: 10 0
0 10

Ecompilation error

Suggested Answer: E

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24 comments · newest first

Catrice 5 days ago

I agree, E seems unlikely.

Francisca 10 days ago

I doubt it’s a compilation error. All includes are fine.

Chantell 15 days ago

I feel like it could be a trick question.

Lezlie 20 days ago

Exactly! So, option A makes sense.

Valentin 25 days ago

But mylist is cleared, so it should show 0.

Georgeanna 1 month ago

Yeah, because third is a copy of second, which has 10 elements.

Johnetta 1 month ago

I think it outputs 10 0.

Suzan 1 month ago

Compilation error seems unlikely; all syntax looks fine.

Frankie 2 months ago

I feel confident about option A too.

Lynna 2 months ago

No, fourth is initialized before mylist is cleared. It should still show 10.

Yuriko 2 months ago

What if it’s option D? Mylist is cleared but fourth is based on it.

Leila 2 months ago

I agree, option A makes sense.

Serita 2 months ago

Mylist is cleared, so it should show 0.

Lilli 2 months ago

Yeah, because third is a copy of second, which has 10 elements.

Gracie 3 months ago

I think it outputs 10 0.

Hui 3 months ago

Definitely not a compilation error, it runs fine!

Stephaine 3 months ago

Is there a compilation error? Seems odd.

Maile 3 months ago

Wait, why does mydeck size become 0?

Norah 3 months ago

I think it should be 10 0, 10 0.

Albert 3 months ago

Looks like it outputs 10 0, 0 10.

Reita 4 months ago

I’m not entirely sure, but I think the output could be option D since `third` is a copy of `second`, and `mylist` is cleared.

Laurene 5 months ago

I practiced a similar question where clearing a container affected the size. I feel like the output might be option A, but I can't recall exactly.

Margurite 5 months ago

I remember something about queues and how they manage their size. I think `third.size()` should return 10, but I'm confused about `mylist.size()` after clearing it.

Shanda 6 months ago

I think the program should compile fine since all the includes are correct, but I'm not sure about the output.

C++ Institute CPP Exam - Topic 4 Question 122 Discussion