C++ Institute Exam CPP Topic 4 Question 70 Discussion

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

Question #: 70
Topic #: 4

[All CPP Questions]

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

#include

using namespace std;

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) { out<

int main() {

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

deque d1(t, t+10);

deque::iterator it = lower_bound(d1.begin(), d1.end(), 4);

for_each(it, d1.end(), Out(cout));cout<

return 0;

}

Program outputs:

A8 10 5 1 4 6 2 7 9 3

B4 5 6 7 8 9 10

C1 2 3 4 5 6 7 8 9 10

Dcompilation error

E1 2 3 4

Show Suggested Answer

Suggested Answer: E

by Daniela at Aug 05, 2023, 08:53 AM

Limited Time Offer

25%

Off

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

Contribute your Thoughts:

Submit Cancel

Maryanne

28 days ago

The code looks pretty straightforward, but I can't help but wonder if the programmer had a bad day when they wrote this. Anyway, I'm going with A.

upvoted 0 times

...

Lashunda

1 months ago

Wait, is the lower_bound function supposed to return the element itself or the first element greater than the value? I'm not sure about the answer.

upvoted 0 times

Carmelina

7 days ago

Exactly, that's why the answer is B.

upvoted 0 times

...

Carmelina

8 days ago

So the output will start from 4.

upvoted 0 times

...

Carmelina

14 days ago

It returns the first element greater than or equal to the value.

upvoted 0 times

...

Carmelina

17 days ago

B) 2 3 4 5 6 7 8 9 10 11

upvoted 0 times

...

Chuck

1 months ago

Haha, looks like we're sorting a deque in reverse order. The correct answer is C.

upvoted 0 times

Raymon

7 days ago

I agree, the correct answer is C.

upvoted 0 times

...

Ty

1 months ago

I think the code will compile without any errors, so the answer is not E.

upvoted 0 times

...

Alecia

2 months ago

The output should be 4 5 6 7 8 9 10, so the correct answer is A.

upvoted 0 times

Maddie

9 days ago

That's correct! The output is indeed 4 5 6 7 8 9 10.

upvoted 0 times

...

Patria

1 months ago

That's correct! The output should be 4 5 6 7 8 9 10.

upvoted 0 times

...

Maddie

1 months ago

A) 1 2 3 4 5 6 7 8 9 10

upvoted 0 times

...

Patria

1 months ago

A) 1 2 3 4 5 6 7 8 9 10

upvoted 0 times

...

Shalon

2 months ago

I'm not sure, but I think the answer is A) 1 2 3 4 5 6 7 8 9 10 because lower_bound returns an iterator to the first element that is not less than the value passed, which is 4 in this case.

upvoted 0 times

...

Lewis

2 months ago

I agree with Viola, the lower_bound function returns an iterator to the first element that is not less than the value passed, so the output should be A) 1 2 3 4 5 6 7 8 9 10.

upvoted 0 times

...

Viola

2 months ago

I think the answer is A) 1 2 3 4 5 6 7 8 9 10 because lower_bound finds the first element that is not less than 4 in the deque.

upvoted 0 times

...