c++ institute cpa practice test

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class complex{
double re, im;
public:
complex() : re(1),im(0.4) {}
complex operator+(complex &t);
void Print() { cout << re << " " << im; }
};
complex complex::operator+ (complex &t){
complex temp;
temp.re = this?>re + t.re;
temp.im = this?>im + t.im;
return temp;
}
int main(){
complex c1,c2,c3;
c3 = c1 + c2;
c3.Print();
}

• A. It prints: 1 0.4
• B. It prints: 2 0.8
• C. It prints: 0 0
• D. Garbage value

What happens when you attempt to compile and run the following code?
#include <cstdlib>
#include <iostream>
using namespace std;
float* sum(float a,float b);
float* sum(float a,float b)
{
float *f = new float;
*f = a+b;
return f;
}
int main()
{
float a,b,*f;
a = 1.5; b = 3.4;
f = sum(a,b);
cout<<*f;
return 0;
}

• A. It prints: 0
• B. It prints: 4.9
• C. It prints: 5
• D. It prints: 4

Which statement should be added in the following program to make work it correctly?
using namespace std;
int main (int argc, const char * argv[])
{
cout<<"Hello";
}

• A. #include<stdio.h>
• B. #include<stdlib.h>
• C. #include <iostream>
• D. #include<conio.h>

What is the output of the program?
#include <iostream>
using namespace std;
int main()
{
int tab[4]={10,20,30,40};
tab[1]=10;
int *p;
p=&tab[0];
cout<<*p;
return 0;
}

• A. It prints: 10
• B. It prints: 20
• C. It prints: 11
• D. It prints: 30

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int fun(int x) {
return 2*x;
}
int main(){
int i;
i = fun(1) & fun(0);
cout << i;
return 0;
}

• A. It prints: 0
• B. It prints: 1
• C. It prints: -1
• D. Compilation error

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class A {
public:
virtual void Print()=0;
};
class B:public A {
public:
virtual void Print() { cout<< "B"; }
};
class C:public A {
public:
virtual void Print() { cout<< "C"; }
};
int main()
{
B ob2;
C ob3;
A *obj;
obj = &ob2;
obj?>Print();
obj = &ob3;
obj?>Print();
}

• A. It prints: BC
• B. It prints: CB
• C. It prints: CC
• D. It prints: BB

What will the variable "age" be in class B?
class A {
int x;
protected:
int y;
public:
int age;
};
class B : private A {
string name;
public:
void Print() {
cout << name << age;
}
};

• A. public
• B. private
• C. protected
• D. None of these

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int x=5;
static int y;
int i=0;
void static myFunction()
{
y=x++ + ++i;
}
int main (int argc, const char * argv[])
{
x++;
myFunction();
cout<<y<<" "<<x<< " " << i;
}

• A. Compilation fails
• B. It prints: 5 5 0
• C. It prints: 7 7 1
• D. It prints: 6 5 1

Which of the structures is incorrect?
1:
struct s1{
int x;
long int li;
};
2:
struct s2{
float f;
struct s2 *s;
};
3:
struct s3{
float f;
struct s3 s;
};

• A. 1
• B. 2
• C. 3
• D. 2, 3

What is the output of the program?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s1="Wo";
string s2;
s2 = s1;
string s3;
s3 = s2.append("rldHello");
cout << s3;
return( 0 );
}

• A. It prints: WorldHello
• B. It prints: HelloWo
• C. It prints: World
• D. It prints: Hello