CPA-21-02 Online Practice Questions and Answers
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;
A :x = x + 1;
}
void Print() { cout << x << A::x << B::x; }
};
int main () {
C c2(1);
c2.Print();
return 0;
}
A.
It prints: 1
B.
It prints: 121
C.
It prints: 111
D.
It prints: 2
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;
}
A. It prints: float exception. Exception Nr.
B. It prints: int exception. Exception Nr. 20
C. It prints: An exception occurred
D. It prints: float exception. Exception Nr. 5.2
What happens when you attempt to compile and run the following code?
#include
using namespace std;
int main()
{
int *t; t = new int[2];
for (int i=0; i<2; i++) {
t[i]=0;
}
cout << t[1];
}
A. It prints: 0
B. It prints: 1
C. It prints: 2
D. It prints: 3
Given:
#include
#include
using namespace std;
int main () {
try
{
int * myarray= new int[1000];
}
catch (bad_allocand)
{
cout << "Error allocating memory";
}
catch (exceptionand e)
{
cout << "Standard exception";
}
catch (...)
{
cout << "Unknown exception";
}
return 0;
}
What will happen if we use the operator "new" and the memory cannot be allocated?
A. It prints: Error allocating memory
B. It prints: Standard exception
C. It prints: Unknown exception
D. Compilation error
What happens when you attempt to compile and run the following code?
#include
#include
using namespace std;
int f(int i, int b);
int main()
{
int i=0;
i++;
for (i=0; i<=2; i++)
{
cout< } return 0; } int f(int a, int b) { return a+b; } A. It prints: 202020 B. It prints: 012 C. It prints: 0 D. It prints: 2
Which of the following statements may completely ignore their bodies (inner statements)? (Choose three.)
A. do
B. swicch
C. for
D. while
What is the output of the program if characters 'h', 'e', 'l', 'l' , 'o' and enter are supplied as input?
#include
#include
using namespace std;
void f();
int main()
{
f();
return 0;
}
void f()
{
char c;
c = cin.get();
cout << c;
if(c != '\n')
f();
}
A. It prints: hello
B. It prints: olleh
C. It prints: h
D. It prints: o
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 {
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: 42
B. It prints: 44
C. It prints: 22
D. It prints: 2
Analyze the code below. If it contains an error, indicate its place in the program.
A. Error in the for loop
B. Error in the break statement
C. No error
D. Error in the if statement
What happens when you attempt to compile and run the following code?
A. It prints: 3
B. It prints: 4
C. It prints: 0
D. It prints: 6