Interview Questions on OOABAP

1. what is static Class ?
 A. A class which contains only static components like( Static methods,Static Attributes...)
    and no instance components.

2. Can we redefine( Polymorphism ) static methods ?
 A. No.

3. what is singleton class ?
 A. It is a  design pattern which creates only one Object instance for class .

4. What is Update Function Module ?
 A.  It is triggered when Explicit or Implicit COMMIT WORK executed and used for SAP LUW.

5, Can we use non Static attributes in static class ?
 A. No.