CPP C++ Certified Professional Programmer Questions and Answers

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

#include

#include

#include

using namespace std;

int main ()

{

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

dequed1(t, t+10);

vectorv1(t, t+10);

cout<

cout<

d1.resize(12); v1.resize(12);

cout<

cout<

d1.reserve(20);v1.reserve(20);

cout<

cout<

return 0;

}

Which are NOT valid instantiations of priority_queue object:

#include

#include

#include

#include

#include

using namespace std;

int main()

{

deque mydeck;list mylist; vector myvector;

priority_queue first;//line I

priority_queue > second;//line II

priority_queue third(first);//line III

priority_queue > fourth(third);//line IV

priority_queue > fifth(myvector.begin(), myvector.end());//line V

return 0;

}

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

#include

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

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

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

bool Greater(int v1, int v2) { return v1

int main() {

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

vector v1(t, t+10);

sort(v1.begin(), v1.end(), Greater);

for_each(v1.begin(), v1.end(), Out(cout));cout<

return 0;

}

Program outputs:

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

#include

#include

#include

using namespace std;

void print(int v) { cout<

struct Sequence {

int start;

Sequence(int start):start(start){}

int operator()() {

return 10*(1+(start++ %3));

}

};

int main() {

vector v1(10);

generate_n(v1.begin(), 10, Sequence(1));

remove(v1.begin(), v1.end(), 10);

for_each(v1.begin(), v1.end(), print);cout<

return 0;

}

Program outputs:

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

#include

#include

using namespace std;

class A

{

int a;

public:

A():a(0){} A(int a){ this?>a = a;}

void setA(int a) {this?>a = a;}

int getA() {return a;}

};

ostream &operator<<(ostream & cout, A & a)

{

cout<< a.getA();

return cout;

}

int main ()

{

vectorv(5, new A());

v.push_back(new A(1));

vector::iterator it;

for(it = v.begin(); it != v.end(); it++)

{

cout<<*it<<" ";

}

cout<

return 0;

}

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

#include

using namespace std;

int main()

{

cout.setf(ios::hex, ios::basefield);

cout<<100.33<<" ";

cout.setf(ios::showbase);

cout<<100.33<<" ";

return 0;

}

Program outputs:

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

#include

#include

#include

using namespace std;

int main(){

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

listv(t, t+10);

multiset s1(v.begin(),v.end());

if (s1.count(3) == 2) {

s1.erase(3);

}

for(multiset::iterator i=s1.begin();i!= s1.end(); i++) {

cout<<*i<<" ";

}

return 0;

}

What happens when you attempt to compile and run the following code? Choose all that apply.

#include

#include

#include

using namespace std;

class A

{

int a;

public:

A(int a) {this?>a = a; c++;}

A(const A & a) {this?>a = a.a; c++;}

~A() { c??;}

static int c;

};

int A::c(0);

int main ()

{

A* t[] = {new A(1), new A(2), new A(3),new A(4), new A(5)};

vectorv1(t, t+10);

dequed1(v1.begin(), v1.end());

d1.clear();

v1.clear();

cout<

return 0;

}

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

#include

#include

using namespace std;

class A

{

int a,b;

public:

A & operator =(const A & c) { a = c.a; return *this;}

A():a(0),b(0){}

void setA(int a) {this?>a = a;} void setB(int b) {this?>b = b;}

int getA() {return a;} int getB() {return b;}

};

int main ()

{

vectorv;

A a;

a.setA(10); a.setB(11);

v.push_back(a);

A b = v.front(); v.pop_back();

cout<

return 0;

}

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

#include

#include

using namespace std;

template

void print(T start, T end) {

while (start != end) {

std::cout << *start << " "; start++;

}

}

int main()

{

int t1[] ={ 1, 2, 3, 4, 5};

list l1(t1, t1 + 5);

l1.remove(2);

print(l1.begin(), l1.end()); cout<

return 0;

}

What will happen when you attempt to compile and run the following code? Choose all possible answers.

#include

using namespace std;

class B {};

template

class A {

T_v;

public:

A() {}

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

T getV() { return _v; }

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

};

int main()

{

A a(1);

Ab;

a.add(10);

cout << a.getV() <

return 0;

}