CPA-21-02 by C++ Institute Valid Free Exam Practice Test

Question 1

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[2];
for (int i=0; i<2; i++)
t[i].Print();
}

A. It prints: John 31 B. It prints: John 30John 30 C. It prints: 30 D. It prints: John

Correct Answer: B

Question 2

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
class A {
public:
int x;
A() { x=0;}
A(int x) { this?>x=x;}
};
class B : private A {
public:
using A::x;
B() { x=1;}
B(int x) {this?>x = x;}
};
int main () {
B c1;
B c2(?5);
cout << c1.x;
cout << c2.x;
return 0;
}

A. It prints: 05 B. It prints: 5 C. It prints: 0 D. It prints: 1?5

Correct Answer: D

Question 3

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class First
{
public:
void Print(){ cout<<"from First";}
};
class Second:public First
{
public:
void Print(){ cout<< "from Second";}
};
void fun(First *obj);
int main()
{
First FirstObject;
fun(&FirstObject);
Second SecondObject;
fun(&SecondObject);
}
void fun(First *obj)
{
obj?>Print();
}

A. It prints: from Secondfrom Second B. It prints: from Firstfrom Second C. It prints: from Firstfrom First D. It prints: from First

Correct Answer: C

Question 4

What is not inherited from the base class?

A. destructor B. operator=() C. operator+() D. constructor

Correct Answer: A,B,D

Question 5

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s1[]= {"How" , "to" };
s1[0].swap(s1[1]);
for (int i=0; i<2; i++) {
cout << s1[i];
}
return( 0 );
}

A. It prints: Hoto B. It prints: Ht C. It prints: to D. It prints: toHow

Correct Answer: D

Question 6

What happens when you attempt to compile and run the following code?
#include <iostream>
#include <string>
using namespace std;
int main()
{
string s1[]= {"H" , "t" };
string s;
for (int i=0; i<2; i++) {
s = s1[i];
s.insert(1,"o");
cout << s;
}
return( 0 );
}

A. It prints: Hoto B. It prints: Ht C. It prints: Ho D. It prints: to

Correct Answer: A

Question 7

Which code, inserted at line 8, generates the output "100"?
#include <iostream>
using namespace std;
int fun(int);
int main()
{
int *x = new int;
*x=10;
//insert code here
return 0;
}
int fun(int i)
{
return i*i;
}

A. cout << fun(y) ; B. cout << fun(*x) ; C. cout << fun(10); D. cout << fun(5) ;

Correct Answer: B,C

Question 8

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

A. It prints: x B. It prints: Scring C. It prints: 3.14 D. It causes a compilation error

Correct Answer: A

Question 9

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
class A {
public:
int x;
A() { x=0;}
};
class B : public A {
public:
B() { x=1;}
};
class C : private B {
public:
C() { x=2;}
};
int main () {
C c1;
cout << c1.x;
return 0;
}

A. It prints: 210 B. It prints: 010 C. It prints: 110 D. Compilation error

Correct Answer: D

C++ Institute CPA - C++ Certified Associate Programmer - CPA-21-02 Exam Practice Test