C++ Institute CPA - C++ Certified Associate Programmer - CPA-21-02 Exam Questions

QUESTION NO: 1
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
int main()
{
int x=0;
int *ptr;
ptr = &x;
cout<<x<<" "<<*ptr;
return 0;
}

QUESTION NO: 2
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();
}

QUESTION NO: 3
Which of the following statements are correct?

QUESTION NO: 4
What is the output of the program?
#include <iostream>
#include <string>
using namespace std;
int main () {
string s1 = "Hello", s2 = "World";
s2 = s1 + s2;
cout << s2;
return 0;
}

QUESTION NO: 5
Point out an error in the program.
#include <iostream>
using namespace std;
int main()
{
char s1[] = "Hello";
char s2[] = "world";
char *const ptr = s1;
*ptr = 'a';
ptr = s2;
return 0;
}

QUESTION NO: 6
What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class Base {
static int age;
public:
Base () {};
~Base () {};
void setAge(int a=20) {age = a;}
void Print() { cout << age;}
};
int Base::age=0;
int main () {
Base a;
a.setAge(10);
a.Print();
a.setAge();
a.Print();
return 0;
}

QUESTION NO: 7
What happens if you try to compile and run this program?
#include <iostream>
using namespace std;
int main (int argc, const char * argv[])
{
print("Test");
return 0;
}
void print(int c[])
{
cout<<c;
}

QUESTION NO: 8
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class A {
public:
int age;
A () { age=5; };
};
class B : private A {
string name;
public:
B () { name="Bob"; };
void Print() {
cout << name << age;
}
};
int main () {
B b,*ob;
ob = &b;
ob?>age = 10;
ob?>Print();
return 0;
}

QUESTION NO: 9
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
struct Person {
string name;
int age;
};
class First
{
Person *person;
public:
First() {person = new Person;
person?>name = "John";
person?>age = 30;
}
void Print(){
cout<<person?>name << " "<< person?>age;
}
};
int main()
{
First t;
t.Print();
}

QUESTION NO: 10
Which code line inserted instead of the comment below will cause the program to produce the expected output?

QUESTION NO: 11
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class A {
int x;
protected:
int y;
public:
int z;
A() { x=1; y=2; z=3; }
};
class B : public A {
public:
void set() {
y = 4; z = 2;
}
void Print() {
cout << y << z;
}
};
int main () {
B b;
b.set();
b.Print();
return 0;
}

QUESTION NO: 12
What will the variable "y" 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;
}
};

QUESTION NO: 13
What happens when you attempt to compile and run the following code?

QUESTION NO: 14
What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class A {
public:
A() { cout << "A0 ";}
A(string s) { cout << "A1";}
};
class B : public A {
public:
B() { cout << "B0 ";}
B(string s) { cout << "B1 ";}
};
class C : private B {
public:
C() { cout << "C0 ";}
C(string s) { cout << "C1 ";}
};
int main () {
B b1;
C c1;
return 0;
}