Free Practice Questions for C++ Institute CPP Exam

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? 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

#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);

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

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

for_each(it, d1.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;

class A {

int a;

public:

A(int a) : a(a) {}

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

};

struct Even {

bool operator ()(const A & a, const A &b) {

return (a.getA() % 2)==b.getA() % 2;

}

};

int main () {

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

deque d (t,t+15);

deque::iterator it = search_n(d.begin(), d.end(), 3, 2, Even());

cout<< it?d.begin()<

return 0;

}

Program outputs:

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

#include

using namespace std;

template

class A {

T_v;

public:

A() {}

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

friend ostream & operator<<(ostream & c, const A & v) {

c<

}

};

int main()

{

Aa(10);

cout<

return 0;

}

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

#include

using namespace std;

class C {

public:

int _c;

C():_c(0){}

C(int c) { _c = c;}

C operator+=(C & b) {

C tmp; tmp._c = _c+b._c;

return tmp;

} };

ostream & operator<<(ostream & c, const C & v) {

c<

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 b(2);

Aa (5);

a.add(C());

cout << a.getV() <

return 0;

}

What will happen when you attempt to compile and run the code below, assuming that you enter the following sequence: one two three?

#include

#include

using namespace std;

int main ()

{

string a;

cin.getline(a);

cout<

return 0;

}

Program will output:

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

#include

#include

#include

#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

};

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() {

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

B t1[]={B(1),B(2),B(3),B(4)};

deque d1(t, t+10);

set s1(t, t+10);

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

cout<

<

return 0;

}

Program outputs: