6. Why we use the “dynamic_cast” type conversion?

1. 1. to be used in low memory

   
   
   

   2. result of the type conversion is an invalid

   
   
   

   3. result of the type conversion is a valid

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   It is used to check that operators and operands are compatible after conversion.

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7. How many parameters does a conversion operator may take?

1. 1. as many as possible

   
   
   

   2. 3

   
   
   

   3. 2

   
   
   

   4. 1

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: E

   0 parameters does a conversion operator may take.

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8. What is the output of this program?
   

   #include <iostream>
       using namespace std;
       class Example
       {
           public:
           Example(int k) : num_k(k) { }
           public:
           int operator()(int k = 0) const 
           { 
               return num_k + k; 
           }
           operator int () const   
           { 
               return num_k; 
           }
           private:
           int num_k;
           friend int g(const Example&);
       };
       int fun(char Z)
       {
           return Z;
       }
       int main()
       {
           Example fun(6);
           cout << fun(5);
           return 0;
       }
   

1. 1. 6

   
   
   

   2. 5

   
   
   

   3. 11

   
   
   

   4. Compilation Error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   In this program, we are adding its value with it itself, So only we got the output as 11.

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9. How to stop your program from eating so much ram?

1. 1. Use the hard drive, instead of RAM

   
   
   

   2. Declare it in program memory, instead of on the stack

   
   
   

   3. Find a way to work with the data one at a time

   
   
   

   4. All of the mentioned

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   *Use the hard drive, instead of RAM.
   *Declare it in program memory, instead of on the stack.
   *Find a way to work with the data one at a time.

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10. Pick out the correct syntax of operator conversion.

1. 1. operator float()

   
   
   

   2. operator const

   
   
   

   3. operator float()const

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   operator float()const

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