21. What is the output of this program?
    

    #include <iostream>
        using namespace std;
        int main()
        {
            double P = 12.93099;
            float Q = 11.120;
            int R ;
            R = (int) P;
            cout << R <<" ";
            R = (int) Q;
            cout << R ;
            return 0;
        }
    

1. 1. 12.93099 11.120

   
   
   

   2. 11.120 12.93099

   
   
   

   3. 11 12

   
   
   

   4. 12 11

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   In this program, we casted the data type to integer.

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22. How are types therein user-defined conversion?

1. 1. 4

   
   
   

   2. 3

   
   
   

   3. 2

   
   
   

   4. 1

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   There are two types of user-defined conversions. They are conversion by the constructor, Conversion functions.

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23. 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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24. 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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25. What are the essential operators in c++?

1. 1. <=

   
   
   

   2. +

   
   
   

   3. |

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   +, |, and <= all are the essential operators in c++.

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