C++ Institute Exam CPP Topic 6 Question 104 Discussion

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

Question #: 104
Topic #: 6

[All CPP Questions]

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

#include

int main ()

{

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

std::vectorv1(t,t+5);

std::vectorv2(v1);

v1.resize(10);

v2.reserve(10);

std::vector::iterator i = v1.begin();int ii = 0;

while (i != v1.end()) { std::cout<

i = v2.begin();ii=0;

while (i != v2.end()) { std::cout<

return 0;

}

Aprogram outputs 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

Bcompilation error

Cprogram outputs 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5

Dprogram outputs 1 2 3 4 5 0 0 0 0 0 1 2 3 4 5 0 0 0 0 0

Show Suggested Answer

Suggested Answer: E

by Kayleigh at Feb 06, 2025, 09:48 AM

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Nichelle

2 days ago

Haha, I can already see the compiler throwing a fit at this code. Time to brush up on my C++ vector knowledge!

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Trina

12 days ago

Ah, the classic vector resizing and copying conundrum. I bet the answer has something to do with the difference between resize() and reserve().

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Micaela

18 days ago

This looks like a tricky one! I'm going to have to think through the memory management implications carefully.

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Howard

3 days ago

It will output 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

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Beth

20 days ago

I'm not sure, but I think the answer might be C) program outputs 1 1 1 1 1 1 1 1 1 1 1 2 3 4 5 because of the way the vectors are being manipulated.

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Andrew

21 days ago

I agree with Goldie, the code looks like it will not compile correctly.

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Goldie

25 days ago

I think the answer is B) compilation error because there seems to be an issue with the code.

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