What is the output of the following code in C++?

1. What is the output of the following code in C++? (Variables & Arithmetic)
int a=4,b=6; cout<<a*b;

(A) 24

(B) 10

(C) 46

(D) Error

2. What is the output of the following code in C++? (Increment Operator)
int a=5; cout<<a++<<” “<<a;

(A) 5 5

(B) 6 6

(C) 5 6

(D) 6 5

3. What is the output of the following code in C++? (Pre-increment)
int a=5; cout<<++a;

(A) 6

(B) 5

(C) 7

(D) Error

4. What is the output of the following code in C++? (If-Else)
int a=10; if(a>5) cout<<“Yes”; else cout<<“No”;

(A) No

(B) Yes

(C) 1

(D) Error

5. What is the output of the following code in C++? (For Loop)
for(int i=1;i<=3;i++) cout<<i;

(A) 123

(B) 012

(C) 321

(D) 111

6. What is the output of the following code in C++? (While Loop)
int i=1; while(i<=3){cout<<i;i++;}

(A) 012

(B) 321

(C) 123

(D) Infinite loop

7. What is the output of the following code in C++? (Do-While Loop)
int i=3; do{cout<<i;i–;}while(i>0);

(A) 123

(B) 210

(C) 321

(D) 012

8. What is the output of the following code in C++? (Break Statement)
for(int i=1;i<=5;i++){ if(i==3) break; cout<<i; }

(A) 12345

(B) 123

(C) 1234

(D) 12

9. What is the output of the following code in C++? (Continue Statement)
for(int i=1;i<=5;i++){ if(i==3) continue; cout<<i; }

(A) 1245

(B) 12345

(C) 135

(D) 12

10. What is the output of the following code in C++? (Ternary Operator)
int a=4; cout<<(a%2==0?”Even”:”Odd”);

(A) Odd

(B) Error

(C) 0

(D) Even

11. What is the output of the following code in C++? (Logical Operators)
int a=5; cout<<(a>3 && a<10);

(A) 0

(B) Error

(C) True

(D) 1

12. What is the output of the following code in C++? (Relational Operators)
cout<<(10!=5);

(A) 0

(B) False

(C) True

(D) 1

13. What is the output of the following code in C++? (Switch Statement)
int x=2; switch(x){case 1:cout<<“One”;break; case 2:cout<<“Two”;break; default:cout<<“Other”;}

(A) One

(B) Error

(C) Other

(D) Two

14. What is the output of the following code in C++? (Array)
int arr[3]={1,2,3}; cout<<arr[1];

(A) 1

(B) 3

(C) 2

(D) Error

15. What is the output of the following code in C++? (String Length)
string s=”C++”; cout<<s.length();

(A) 3

(B) 2

(C) 4

(D) Error

16. What is the output of the following code in C++? (Function Call)
void show(){cout<<“Hello”;} int main(){show();}

(A) Error

(B) show

(C) Hello

(D) No output

17. What is the output of the following code in C++? (Recursion)
int fun(int n){ if(n==0) return 0; return n+fun(n-1);} cout<<fun(3);

(A) 3

(B) Error

(C) 9

(D) 6

18. What is the output of the following code in C++? (Pointer)
int a=10; int *p=&a; cout<<*p;

(A) 10

(B) Address of a

(C) 0

(D) Error

19. What is the output of the following code in C++? (Reference)
int a=5; int &r=a; r=10; cout<<a;

(A) 5

(B) 0

(C) 10

(D) Error

20. What is the output of the following code in C++? (Dynamic Memory)
int *p=new int(5); cout<<*p;

(A) 0

(B) Error

(C) Garbage

(D) 5

21. What is the output of the following code in C++? (Class & Object)
class Test{public:int x=10;}; Test t; cout<<t.x;

(A) 10

(B) 0

(C) Garbage

(D) Error

22. What is the output of the following code in C++? (Constructor)
class A{public:A(){cout<<“A”;}}; A obj;

(A) No output

(B) Constructor

(C) Error

(D) A

23. What is the output of the following code in C++? (Destructor)
class A{public:~A(){cout<<“X”;}}; int main(){A obj;}

(A) No output

(B) X

(C) Error

(D) XX

24. What is the output of the following code in C++? (Inheritance)
class A{public:void show(){cout<<“A”;}}; class B:public A{}; int main(){B obj; obj.show();}

(A) A

(B) B

(C) AB

(D) Error

25. What is the output of the following code in C++? (Function Overloading)
void fun(int x){cout<<“Int”;} void fun(double x){cout<<“Double”;} int main(){fun(5);}

(A) Error

(B) Double

(C) Int

(D) No output

26. What is the output of the following code in C++? (Virtual Function)
class A{public:virtual void show(){cout<<“A”;}}; class B:public A{public:void show(){cout<<“B”;}}; int main(){A* ptr; B obj; ptr=&obj; ptr->show();}

(A) A

(B) AB

(C) B

(D) Error