C++ Institute CPP Exam Practice Test Instant Access

Question 1

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

Answer : B

Question 2

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

#include

class A {

public:

virtual int f() { return 10; }

virtual ~A(){}

};

class B: public A {

int f() {return 11; }

virtual ~B(){}

};

int main (){

std::vectorv1;

for(int i = 10; i>0; i??)

{

i%2>0?v1.push_back(new A()):v1.push_back(new B());

}

std::vector::iterator it = v1.begin();

while(it != v1.end())

{

std::cout<f()<<" ";

v1.pop_back();++it;

}

return 0;

}

Adestructor of class A will be called

Bdestructor of class B will be called

Ccode will not compile

Dprogram outputs 10 11 10 11 10

Eprogram outputs 10 11 10 11 10 11 10 11 10 11

Answer : D

Question 3

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

#include

using namespace std;

class B { int val;

public:

B(int v=0):val(v){}

int getV() const {return val;}

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

vector v1(t, t+10);

transform(v1.begin(), v1.end(), v1.begin(), bind2nd(plus(), 1));

for_each(v1.rbegin(), v1.rend(), Out(cout));cout<

return 0;

}

Program outputs:

A3 2 4 1 5 6 10 8 7 9

B4 3 5 2 6 7 11 9 8 10

C9 7 8 10 6 5 1 4 2 3

D10 8 9 11 7 6 2 5 3 4

Ecompilation error

Answer : D

Question 4

What happens when you attempt to compile and run the following code?
#include
#include
#include
using namespace std;
int main () {
int t[] = {1,2,3,4,5,1,2,3,4,5};
vector v (t,t+10);
vector::iterator it;
int m1[] = {1, 3, 2};
it = find_first_of (v.begin(), v.end(), m1, m1+3);
cout << "First found at position: " << it?v.begin() << endl;
return 0;
}

Aprogram outputs: First found at position: 5

Bprogram outputs: First found at position: 0

Cprogram outputs: First found at position: 6

Dprogram outputs: First found at position: 1

Eprogram outputs: First found at position: 10

Answer : B

Question 5

What happens when you attempt to compile and run the following code?
#include
using namespace std;
template
void f(A &a)
{
cout<<1<
}
void f(int &a)
{
cout<<2<
}
int main()
{
int a = 1;
f(a);
return 0;
}

Aprogram displays: 1

Bprogram displays: 2

Ccompilation error

Druntime exception

Answer : B

Question 6

What will happen when you attempt to compile and run the following code? Choose all that apply.
#include
#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; }
bool operator < (const A & b) const { return a
};
class F {
A val;
public:
F(A & v):val(v){}
bool operator() (A & v) {
if (v.getA() == val.getA()) return true;
return false;
}
};
int main() {
int t[] = { 10, 5, 9, 6, 2, 4, 7, 8, 3, 1 };
vector v1(t, t + 10);
set s1(t, t + 10);
A a(6); F f(a);
find_if(s1.begin(), s1.end(), f);
if (find_if(v1.begin(), v1.end(), f) !=v1.end()) {
cout<<"Found!\n";
} else {
cout<<"Not found!\n";
}
return 0;
}

Ait will compile successfully

Bit will display Found!

Cit will display Not found!

Dit will not compile successfully

Answer : D

Question 7

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;
}

Aprogram will display:10

Bprogram will not compile

Cprogram will compile

Dprogram will run without output

Answer : A, C

C++ Institute CPP - C++ Certified Professional Programmer Exam Practice Test