CPA - C++ Certified Associate Programmer (CPA-21-02) Free Practice Test

Question 1

How could you pass arguments to functions?

A. by pointer

B. by reference

C. by value

D. by void

Correct Answer: A,B,C

Question 2

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: CB

B. It prints: BC

C. It prints: CC

D. It prints: BB

Correct Answer: B

Question 3

Which code lines inserted independently instead of the comment will make the following program work correctly? (Choose three.)

A. int main

B. int main (int c, char *v[])

C. void main ()

D. int main (int argc, char *argv[])

Correct Answer: B,D

Question 4

What happens when you attempt to compile and run the following code?
#include <iostream>
using namespace std;
void set(struct person*);
struct person
{
int age;
};
int main()
{
struct person e = {18};
set(&e);
cout<< e.age;
return 0;
}
void set(struct person *p)
{
p?>age = p?>age + 1;
}

A. It prints: 19

B. It prints: 0

C. It prints: 18

D. It prints: 20

Correct Answer: A

Question 5

What will the variable "age" be in class B?
class A {
int x;
protected:
int y;
public:
int age;
A () { age=5; };
};
class B : public A {
string name;
public:
B () { name="Bob"; };
void Print() {
cout << name << age;
}
};

A. None of these

B. protected

C. public

D. private

Correct Answer: C

Question 6

What will be the output of the program?
#include <iostream>
using namespace std;
int main()
{
int i=0;
for(; i<=5; i++)
cout << i;
return 0;
}

A. 6

B. 5

C. 0123

D. 012345

Correct Answer: D

Question 7

If there is one, point out an error in the program
#include <iostream>
using namespace std;
int main()
{
int c = 'a';
switch(i)
{
case '2':
cout<<"OK";
case '1':
cout<<"Error";
default:
break;
}
return 0;
}

A. Use of undeclared identifier 'i'

B. Illegal use of 'break'

C. No Error

D. Illegal use of 'continue'

Correct Answer: A

Question 8

Which code, inserted at line 15, generates the output "5 Bob"?
#include <iostream>
#include <string>
using namespace std;
class B;
class A {
int age;
public:
A () { age=5; };
friend void Print(A &ob, B &so);
};
class B {
string name;
public:
B () { name="Bob"; };
//insert code here
};
void Print(A &ob, B &so) {
cout<<ob.age << " " << so.name;
}
int main () {
A a;
B b;
Print(a,b);
return 0;
}

A. friend void Print(A ob, B so);

B. None of these

C. friend void Print(A *ob, B *so);

D. friend void Print(A &ob, B &so);

Correct Answer: D

Question 9

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;
}

A. It prints: 44

B. It prints: 22

C. It prints: 2

D. It prints: 42

Correct Answer: D

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C++ Institute CPA - C++ Certified Associate Programmer (CPA-21-02) Free Practice Test