6. What does a reference provide?

1. 1. Alternate name for the variable

   
   
   

   2. Alternate name for the pointer

   
   
   

   3. Alternate name for the class

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   Because we are pointing memory address using the temp variable.

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7. What is the output of this program?
   

   #include 
       using namespace std;
       int main()
       {
           int num = 11;
           int & numref = num;
           num++;
           cout << "The value of num is " << numref;
           return 0;
       }
   

1. 1. 12

   
   
   

   2. 11

   
   
   

   3. Garbage value

   
   
   

   4. Compilation Error

   
   
   

   5. Runtime Error

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   The value is declared and it isincrementedrement, so it’s value is 11.

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8. What is the output of this program?
   

   #include 
       using namespace std;
       void print (char * str)
       {
           cout << str << endl;
       }
       int main ()
       {
           const char * str = "Interview Mania";
           print(const_cast (str) );
           return 0;
       }
   

1. 1. Interview

   
   
   

   2. Mania

   
   
   

   3. Interview Mania

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   In this program we used the concept of constant casting to cast the variable and printing it.

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9. Identify the correct sentence regarding inequality between reference and pointer.

1. 1. we can use reference to reference

   
   
   

   2. we can not create the array of reference

   
   
   

   3. we can create the Array of reference

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   we can not create the array of reference

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10. Pick out the correct statement.

1. 1. lvalue equivalent to the value at the pointer address

   
   
   

   2. The NULL pointer dereference occurs where a pointer that is expected to be a valid address but instead is equal to the memory address

   
   
   

   3. The NULL pointer dereference occurs where a pointer that is expected to be a valid address but instead is equal to NULL

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   The NULL pointer dereference occurs where a pointer that is expected to be a valid address but instead is equal to NULL

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