Answer : C

Explaination

A constructor cant be overridden.

Answer : B

Explaination

An array never is passed with call by value mechanism

Answer : D

Explaination

Both styles of commenting is available in C++.

Answer : B

Explaination

A class containing anther class object as its member is called as container class and exhibits HAS A relationship.

Answer : B

Explaination

Defining a templated class is defining a generic class. Hence functionality of the class is generalized for several types, if applicable.

Answer : A

Explaination

Answer : B

Explaination

As the access is linear.

Answer : C

Explaination

Answer : B

Explaination

It extracts the data from stream into variables.

Answer : C

Explaination

Answer : A

Explaination

When the program is in execution phase the possible unavoidable error is called as an exception.

Answer : A

Explaination

goto just does the unconditional branching.

Answer : D

Explaination

Compile error - constant variable cannot be modified.

#include<iostream>

using namespace std;
main() { 
   const int a = 5;
   
   a++; 
   cout<<a; 
}

Answer : C

Explaination

No output, as we are comparing both base addresses and are not same.

#include<iostream>

using namespace std;
main() {
   char s[] = "hello", t[] = "hello";
   if(s==t)
      cout<<"eqaul strings";
}

Answer : C

Explaination

0 8, enums gives the sequence starting with 0. If assigned with a value the sequence continues from the assigned value.

#include<iostream>

using namespace std;
main() {
   enum { 
      india, is = 7, GREAT 
   };

   cout<<india<<" "<<GREAT;
}

Answer : A

Explaination

0, with post decrement operator value of the variable will be considered as the expressions value and later gets decremented

#include<iostream>

using namespace std;
main() {
   short unsigned int i = 0; 
   
   cout<<i--;
}

Answer : A

Explaination

compile error, keyword break can appear only within loop/switch statement.

#include<iostream>

using namespace std;
main() { 
   int x = 5;

   if(x==5) {	
      if(x==5) break;
      cout<<"Hello";
   } 

   cout<<Hi; 
}

Answer : D

Explaination

1 2 3, A static local variables retains its value between the function calls and the default value is 0.

#include<iostream>

using namespace std;
void f() { 
   static int i; 
   
   ++i; 
   cout<<i<<" "; 
}

main() { 
   f(); 
   f(); 
   f(); 
}

Answer : A

Explaination

No output, apart from the option (a) rest of the comments against the options are invalid

#include<iostream>

using namespace std;
void f() {
	cout<<"Hello"<<endl;
}
main() 
{
}

Answer : B

Explaination

Hi, control reaches default-case after comparing the rest of case constants.

#include <iostream>
using namespace std;
 
int main () {
   // local variable declaration:
   int x = 1;

   switch(x) {
   case 1 :
      cout << "Hi!" << endl; 
      break;
   default :
      cout << "Hello!" << endl;
   }
}

Answer : B

Explaination

5 3, call by value mechanism cant alter actual arguments.

#include<iostream>

using namespace std;
void swap(int m, int n) {
   int x = m;

	m = n;
	n = x;
}
main() {
   int x = 5, y = 3;
   
	swap(x,y);
	cout<<x<<" "<<y;
}

Answer : A

Explaination

0, strcmp return 0 if both the strings are equal

#include<iostream>
#include<string.h>

using namespace std;
main() {
   cout<<strcmp("strcmp()","strcmp()");
}

Answer : D

Explaination

Answer Compile Error, It is invalid that either of the operands for the modulus operator (%) is a real number.

#include<iostream>

using namespace std;
main() { 
   int r, x = 2;
   
   float y = 5;
  
   r = y%x;
   cout<<r; 
}

Answer : C

Explaination

union size is biggest element size of it. All the elements of the union share common memory.

#include<iostream>

using namespace std;
main() {
   union abc { 
      char a, b, c, d, e, f, g, h; 
      
      int i;
   };
   cout<<sizeof(abc);
}

Answer : D

Explaination

The size of int depends upon the complier i.e. whether it is a 16 bit or 32 bit.