Discuss C++ Institute CPP Exam Topic 2 Question 51

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

#include

using namespace std;

class B { int val;

public:

B(int v):val(v){}

int getV() const {return val;} bool operator > (const B & v) const { return val>v.val;} };

ostream & operator <<(ostream & out, const B & v) { out<

templatestruct Out {

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

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

int main() {

int t[]={20, 30, 10, 20, 30, 10, 20, 30, 10, 20};

deque d1(t, t+10);

sort(d1.begin(), d1.end(), greater());

pair ::iterator, deque::iterator > result = equal_range(d1.begin(), d1.end(), B(20),

greater());

for_each(result.first, result.second, Out(cout));cout<

return 0;

}

Program outputs:

A30 30 30 20 20 20 20 10 10 10

B20 20 20 20

C30 20 20 20 10

D20 20 20 20 10

E30 20 20 20 20 10

Suggested Answer: B

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13 comments · newest first

KR

Krissy 11 months ago

I agree, A seems more likely with those values!

GA

Gayla 11 months ago

Definitely not B, it's gotta be A or C.

AL

Alverta 12 months ago

Wait, does it really sort like that? Sounds off.

JE

Jerilyn 12 months ago

I think the output will be option B!

CA

Carylon 12 months ago

The code sorts the deque in descending order.

DA

Dan 1 year ago

I practiced a similar question, and I think the output should be the values of `B` that are equal to 20, but I can't recall the exact format.

CU

Curt 1 year ago

I'm not entirely sure, but I think `equal_range` will find all instances of `B(20)` after sorting.

JO

Joseph 1 year ago

I remember that the `deque` is sorted in descending order, so the largest values come first.

TR

Tricia 1 year ago

I feel like the output might be option B, since it seems to match the number of 20s in the sorted deque.

JO

Josephine 1 year ago

Hmm, this looks like a tricky one. I'll need to think through the flow requirements carefully to determine the best approach.

ME

Merlyn 1 year ago

This looks like a pretty straightforward autofs configuration question. I think I can handle this by following the steps in the question and setting up the autofs service properly.

BE

Bette 1 year ago

I'm a bit confused by the options here. Is the Reference Guide more of a general overview, while the Troubleshooting Guide is specifically for resolving issues? I'll have to weigh the differences to determine the best choice.

BA

Basilia 1 year ago

Based on my understanding of IBM Netezza's architecture, the shared file system across the host containers is most likely IBM Spectrum Scale or GPFS. That's my best guess for this question.

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C++ Institute CPP Exam - Topic 2 Question 51 Discussion