Practice Free CPA-21-02 CPA - C++ Certified Associate Programmer Exam Questions Answers With Explanation

What is the output of the program?

#include

using namespace std;

class Base {

static int age;

public:

Base () {};

~Base () {};

void setAge(int a=10) {age = a;}

void Print() { cout << age;}

};

int Base::age=0;

int main () {

Base a,*b;

b = new Base();

a.setAge();

b?>setAge(20);

a.Print();

b?>Print();

return 0;

}

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

#include

using namespace std;

int fun(int x) {

return 2*x;

}

int main(){

int i;

i = fun(0.5) || fun(0);

cout << i;

return 0;

}

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

Which of the following is a user defined data type?

1:

struct person

{

char name[20];

int age;

};

2:

int l=2;

3:

enum color {red,blue, green};

D.

char c;

Which code line inserted instead of the comment below will cause the program to produce the expected output?

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

#include

#include

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;

}

Which of the following is a logical operator?

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

#include

using namespace std;

int op(int x, int y);

int main()

{

int i=2, j=2, k;

float f=0.3;

k = op(i, j);

cout<< k << "," << op(1, f);

return 0;

}

int op(int x, int y)

{

return x+y;

}

Which code, inserted at line 5, generates the output "ABC"?

#include

using namespace std;

class A {

public:

//insert code here

};

class B:public A {

public:

void Print(){ cout<< "B"; }

};

class C:public B {

public:

void Print(){ cout<< "C"; }

};

int main()

{

A ob1;

B ob2;

C ob3;

A *obj;

obj = &ob1;

obj?>Print();

obj = &ob2;

obj?>Print();

obj = &ob3;

obj?>Print();

}

What will be the output of the program?

#include

using namespace std;

int main()

{

const int y = 5;

const x = ?10;

cout<

return 0;

}

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

#include

using namespace std;

struct {

int x;

char c;

union {

float f;

int i;

};

} s;

int main (int argc, const char * argv[])

{

s.x=10;

s.i=0;

cout << s.i << " " << s.x;

}

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

#include

using namespace std;

void set(struct person*);

struct person

{

char name[25];

int age;

};

int main()

{

struct person e = {"Steve", 30};

set(&e);

cout<< e.name << " " << e.age;

return 0;

}

void set(struct person *p)

{

p?>age = p?>age + 1;

}

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

#include

#include

using namespace std;

class A {

int x;

protected:

int y;

public:

int z;

A() { x=1; y=2; z=3; }

};

class B : public A {

string z;

public:

void set() { y = 4; z = "John"; }

void Print() { cout << y << A::z; }

};

int main () {

B b;

b.set();

b.Print();

return 0;

}

What will be the output of the program?

#include

#include

using namespace std;

int fun(int);

int main()

{

float k=3;

k = fun(k);

cout<

return 0;

}

int fun(int i)

{

i++;

return i;

}

Which of the following statements are true? (Choose two.)

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

#include

#include

using namespace std;

class A {

protected:

int y;

public:

int x,z;

A() : x(2), y(2), z(1) { z = x + y; }

A(int a, int b) : x(a), y(b) { z = x + y;}

void Print() { cout << z; }

};

class B : public A {

public:

int y;

B() : A() {}

B(int a, int b) : A(a,b) {}

void Print() { cout << z; }

};

int main () {

A b;

b.Print();

return 0;

}

What will happen if the memory cannot be allocated?

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

#include

#include

using namespace std;

class A {

public:

int x;

A() { x=0;}

};

class B {

public:

int x;

B() { x=1;}

};

class C :public A, public B {

public:

int x;

C(int x) {

this?>x = x;

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

#include

using namespace std;

int fun(int x) {

return 2*x;

}

int main(){

int i;

i = fun(1) & fun(0);

cout << i;

return 0;

}

What is the output of the program?

#include

#include

using namespace std;

class First

{

string name;

public:

First() {

name = "Alan";

}

void Print(){

cout << name;

}

};

int main()

{

First ob1,*ob2;

ob2 = new First();

ob1.Print();

ob2?>Print();

}

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

#include

using namespace std;

int main() {

int i, j;

for(i = 0; i < 2; i++) {

for(j = i; j < i + 1; j++)

if(j == i)

continue;

else

break;

}

cout << j;

return 0;

}

Which of the following expressions decrement variable i by 2? (Choose two.)

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

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

#include

using namespace std;

class First

{

public:

void Print(){ cout<<"from First";}

};

class Second

{

public:

void Print(){ cout<< "from Second";}

};

int main()

{

Second t[2];

for (int i=0; i<2; i++)

t[i].Print();

}

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

#include

using namespace std;

class First

{

public:

First() { cout << "Constructor";}

void Print(){ cout<<"from First";}

};

int main()

{

First FirstObject;

FirstObject.Print();

}

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

#include

#include

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();

}

What is the output of the program given below?

#include

using namespace std;

int main (int argc, const char * argv[])

{

int i=10;

{

int i=0;

cout<

}

cout<

return 0;

}

Which of the following statements are correct about an array?

int tab[10];

Which code, inserted at line 8, generates the output "0102020"?

#include

using namespace std;

class Base {

static int age;

public:

Base () {};

~Base () {};

//insert code here

void Print() { cout << age;}

};

int Base::age=0;

int main () {

Base a,*b;

b = new Base();

a.Print();

a.setAge(10);

a.Print();

b?>setAge();

a.Print();

b?>Print();

return 0;

}

What is the output of the program if character 2 is supplied as input?

#include

using namespace std;

int main () {

int c;

cin >> c;

try

{

switch (c)

{

case 1:

throw 20;

case 2:

throw 5.2f;

}

}

catch (int e)

{ cout << "int exception. Exception Nr. " << e; }

catch (float e)

{ cout << "float exception. Exception Nr. " << e; }

catch (...)

{ cout << "An exception occurred."; }

return 0;

}

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;

}

};

Which code, inserted at line 10, generates the output "Hello World"?

#include

#include

using namespace std;

string fun(string, string);

int main()

{

string s="Hello";

string *ps;

ps = &s;

//insert code here

return 0;

}

string fun(string s1, string s2)

{

return s1+s2;

}

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

#include

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;

}

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

#include

#include

using namespace std;

inline float sum(float a,float b)

{

return a+b;

}

int main()

{

float a,b;

a = 1.5; b = 3.4;

cout<

return 0;

}

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

#include

#include

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;

}

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

#include

using namespace std;

int main(){

int i = 1;

for(i=10; i>-1; i/=2) {

if(!i)

break;

}

cout << i;

return 0;

}

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

#include

#include

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();

}

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

#include

#include

using namespace std;

class A {

public:

A() { cout << "A no parameters";}

A(string s) { cout << "A string parameter";}

A(A &a) { cout << "A object A parameter";}

};

class B : public A {

public:

B() { cout << "B no parameters";}

B(string s) { cout << "B string parameter";}

};

int main () {

A a2("Test");

B b1("Alan");

B b2(b1);

return 0;

}

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

#include

#include

using namespace std;

int mult(int f, int s, int t);

int main()

{

cout << mult(1,2,3);

return 0;

}

int mult(int f, int s, int t)

{

int mult_res;

mult_res = f*s*t;

return mult_res;

}

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

#include

using namespace std;

int main()

{

const int x=0;

const int *ptr;

ptr = &x;

cout<<*ptr;

return 0;

}

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

#include

#include

using namespace std;

class myClass : public exception

{

virtual const char* what() const throw()

{

return "My exception.";

}

} obj;

int main () {

try

{

throw obj;

}

catch (exception& e)

{

cout << e.what() << endl;

}

return 0;

}

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

#include

using namespace std;

void fun(int*);

int main()

{

int i=2;

fun(&i);

cout<

return 0;

}

void fun(int *i)

{

*i = *i**i;

}

Point out an error in the program.

#include

using namespace std;

int main()

{

char s1[] = "Hello";

char s2[] = "world";

char *const ptr = s1;

*ptr = 'a';

ptr = s2;

return 0;

}

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

#include

using namespace std;

int main()

{

int i=2;

switch(i)

{

case 1:

cout<<"Hello";

case 2:

cout<<"world";

case 3:

cout<<"End";

} return 0;

}

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

#include

using namespace std;

void fun(int &i);

int main()

{

int i=2;

fun(i);

cout<

return 0;

}

void fun(int &i)

{

i+=2;

}

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

#include

using namespace std;

void fun(char*);

int main()

{

char t[4]={'0', '1', '2', '3'};

fun(&t[2]);

return 0;

}

void fun(char *a)

{

cout << *a;

}

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

#include

#include

using namespace std;

class First

{

string *s;

public:

First() { s = new string("Text");}

~First() { delete s;}

void Print(){ cout<<*s;}

};

int main()

{

First FirstObject;

FirstObject.Print();

FirstObject.~First();

}

What is the output of the program given below?

#include

using namespace std;

int main (int argc, const char * argv[])

{

int i=10;

{

int i=0;

cout<

}

{

int i=5;

cout << i;

}

cout<

return 0;

}

What is the output of the program?

#include

#include

using namespace std;

int main()

{

string s1[]= {"Hello" , "World" };

for (int i=0; i<2; i++) {

cout << s1[i];

}

return( 0 );

}

What is the output of the program?

#include

using namespace std;

int main()

{

int tab[4]={10,20,30,40};

tab[1]=10;

int *p;

p=&tab[0];

cout<<*p;

return 0;

}

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

#include

using namespace std;

int main(){

int i = 1;

if (--i==1) {

cout << i;

} else {

cout << i-1;

}

return 0;

}

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

#include

#include

using namespace std;

class B;

class A {

int age;

public:

A () { age=5; };

friend class B;

};

class B {

string name;

public:

B () { name="Bob"; };

void Print(A ob) {

cout << name << ob.age;

}

};

int main () {

A a;

B b;

b.Print(a);

return 0;

}

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

#include

using namespace std;

int main(){

int *i;

i = new int;

*i = 1.0 / 2 * 2 / 1 * 2 / 4 * 4;

cout << *i;

return 0;

}

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;

}

};

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

#include

using namespace std;

namespace myNamespace1

{

int x = 5;

int y = 10;

}

namespace myNamespace2

{

float x = 3.14;

float y = 1.5;

}

int main () {

{

using namespace myNamespace1;

cout << x << " ";

}{

using namespace myNamespace2;

cout << y;

}

return 0;

}

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

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

#include

#include

using namespace std;

class complex{

double re, im;

public:

complex() : re(1),im(0.3) {}

complex(double n) { re=n,im=n;};

complex(int m,int n) { re=m,im=n;}

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(1),c2(2),c3;

c3 = c1 + c2;

c3.Print();

}

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

#include

using namespace std;

int main()

{

int x,y=10;

float f;

f = 5.90;

cout << f << ", ";

x=f;

cout << x <<", ";

f=y;

cout << f;

return 0;

}

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

#include

using namespace std;

int main()

{

int a=5;

cout << ((a < 5) ? 9.9 : 9);

}

Which of the following is a correct way to define the function fun() in the program below?

#include

#include

#include

using namespace std;

int main()

{

int a[2][2];

fun(a);

return 0;

}

What is the output of the program given below?

#include

using namespace std;

int main (int argc, const char * argv[])

{

enum state { ok, error, warning};

enum state s1, s2, s3, s4;

s1 = ok;

s2 = warning;

s3 = error;

s4 = ok;

cout << s1<< s2<< s3<< s4;

return 0;

}

What is the expected result of the following program?

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

#include

using namespace std;

namespace myNamespace1

{

int x = 5;

int y = 10;

}

namespace myNamespace2

{

float x = 3.14;

float y = 1.5;

}

int main () {

namespace newname = myNamespace1;

using namespace newname;

cout << x << " ";

cout << y;

return 0;

}

Which code, inserted at line 18, generates the output "AB"

#include

using namespace std;

class A

{

public:

void Print(){ cout<< "A";}

void Print2(){ cout<< "a";}

};

class B:public A

{

public:

void Print(){ cout<< "B";}

void Print2(){ cout<< "b";}

};

int main()

{

B ob2;

//insert code here

ob2.Print();

}

Which of the following operations is INCORRECT?

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

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

#include

using namespace std;

int main()

{

int *a= new int;

*a=100;

cout << *a;

delete a;

}

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

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

#include

using namespace std;

class A

{

public:

virtual void Print(){ cout<<"A";}

};

class B:public A

{

public:

virtual void Print(){ cout<< "B";}

};

int main()

{

A *obj;

A ob1;

obj = &ob1;

obj?>Print();

B ob2;

obj = &ob2;

obj?>Print();

}

What happens if you try to compile and run this program?

#include

using namespace std;

int main (int argc, const char * argv[])

{

print("Test");

return 0;

}

void print(int c[])

{

cout<

}

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

#include

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();

}

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

#include

using namespace std;

int main()

{

int i=2;

switch(i)

{

case 1:

cout<<"Hello";

break;

case 2:

cout<<"world";

break;

case 3:

printf("End");

break;

}

return 0;

}