C++ Institute Exam CPP Topic 8 Question 101 Discussion

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

Question #: 101
Topic #: 8

[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 Glory at Dec 04, 2024, 04:09 PM

Limited Time Offer

25%

Off

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

Contribute your Thoughts:

Submit Cancel

Precious

2 months ago

Wow, this guy must be a real code wizard to come up with something like this. I bet he's spending his weekends hacking the Pentagon or something.

upvoted 0 times

...

Man

2 months ago

I think there might be an issue with the way the template class is defined, causing a compilation error

upvoted 0 times

...

Dacia

2 months ago

Oh, I know this one! The program will display 'Hello world!' because the add() function for the string type concatenates the argument to the beginning of the string. Simple as that!

upvoted 0 times

Reena

1 months ago

That's correct! The string 'world!' will be added to the beginning of 'Hello'.

upvoted 0 times

...

Melissa

1 months ago

Yes, you're right! It will display 'Hello world!'

upvoted 0 times

...

Theola

2 months ago

But the code seems to be correct, why do you think it will result in a compilation error?

upvoted 0 times

...

Ressie

2 months ago

Bah, this is a piece of cake! The code will compile and run just fine. The output will be 'Hello world!', as expected.

upvoted 0 times

...

Man

2 months ago

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

upvoted 0 times

...

Cathrine

2 months ago

Haha, I bet the person who wrote this code was trying to be too clever. But it looks like they got it right!

upvoted 0 times

Lyda

1 months ago

Definitely, the person who wrote this code knew what they were doing.

upvoted 0 times

...

Luis

1 months ago

I agree, the output should be Hello world!

upvoted 0 times

...

Rupert

1 months ago

Yeah, the code looks correct. It should work without any errors.

upvoted 0 times

...

Sheridan

2 months ago

I think the program will display: Hello world!

upvoted 0 times

...

Elina

2 months ago

The program will display 'Hello world!' because the add() function for the string type inserts the argument at the beginning of the string.

upvoted 0 times

Jaime

1 months ago

C) program will display: world!Hello

upvoted 0 times

...

Tricia

1 months ago

B) compilation error

upvoted 0 times

...

Julieta

1 months ago

A) program will display: Hello world!

upvoted 0 times

...

Theola

2 months ago

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

upvoted 0 times

...