C++ Institute Exam CPP Topic 9 Question 87 Discussion

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

Question #: 87
Topic #: 9

[All CPP Questions]

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

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

A(T v): _v(v){}

T getV() { return _v; }

void add(T & a);

void add(string & a);

};

template

void A::add(T & a) { _v+=a; }

void A::add(string & a) {

_v.insert(0, a);

}

int main()

{

Aa("Hello");

string s(" world!");

a.add(s);

cout << a.getV() <

return 0;

}

Aprogram will display: Hello world!

Bcompilation error

Cprogram will display: world!Hello

Dprogram will run without any output

Show Suggested Answer

Suggested Answer: B

by Flo at Jun 21, 2024, 09:57 PM

Limited Time Offer

25%

Off

Get Premium CPP Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Regenia

6 months ago

Wait, are we supposed to actually understand this code? I'll just go with option B - 'compilation error' and call it a day.

upvoted 0 times

...

Starr

6 months ago

Haha, the programmer must have had a wild night before writing this code. Option D - 'program will run without any output' seems plausible.

upvoted 0 times

Jacqueline

5 months ago

I've seen worse code before. Option D does seem like the most likely outcome.

upvoted 0 times

...

Corinne

5 months ago

Yeah, the code looks a bit messy. I agree, option D seems like the correct choice.

upvoted 0 times

...

Nicolette

5 months ago

I think the code will compile but not display anything. Option D sounds right.

upvoted 0 times

...

Dean

5 months ago

Yeah, option D seems like the most likely outcome.

upvoted 0 times

...

Bettyann

5 months ago

I agree, but it might not display anything when run.

upvoted 0 times

...

Alisha

5 months ago

I think the code will compile without any errors.

upvoted 0 times

...

Emile

6 months ago

Hmm, looks like there's some string manipulation happening here. I'll go with option C - 'world!Hello'.

upvoted 0 times

Shelba

5 months ago

I believe it will show: world!Hello

upvoted 0 times

...

Shelba

5 months ago

I think it will display: world!Hello

upvoted 0 times

...

Stefany

6 months ago

I think the answer is C) program will display: world!Hello because of the order of insertion in the code

upvoted 0 times

...

Tijuana

6 months ago

I agree with Starr, A) program will display: Hello world! makes sense because of the code logic

upvoted 0 times

...

Romana

6 months ago

I disagree, I believe the answer is B) compilation error

upvoted 0 times

...

Starr

6 months ago

I think the answer is A) program will display: Hello world!

upvoted 0 times

...

Rodrigo

6 months ago

This code looks like a template class implementation, so the correct answer should be option A. The program will display 'Hello world!'.

upvoted 0 times

Bette

5 months ago

Yes, the output will be 'Hello world!'

upvoted 0 times

...

Norah

5 months ago

So, the correct answer should be option A.

upvoted 0 times

...

Denny

5 months ago

I agree, it looks like a template class implementation.

upvoted 0 times

...

Paz

6 months ago

I think the program will display: Hello world!

upvoted 0 times

...