1. What is abstract class in java ?
2. Why do we use abstract class in java ?
3. What is interface in java ?
4. why abstract class and interface came in java ?
5. Why does java not support multiple inheritence ?

Sachin sliped

Sachin again sliped from his 100th century.

1. Why java doesn't support multiple inheritence.
2. Why Wait and notify are in object class.