Answers for "what is ? in interface"

1

interfaces are used as

It is used to achieve total abstraction.
 Since java does not support multiple inheritance in case of class, but by using interface it can achieve multiple inheritance .
 It is also used to achieve loose coupling.
Posted by: Guest on June-08-2021
3

interface definition

Interface Define a set of Characteristics and Behaviors 
such as 
Member Signature Only
No Implementation Details
Cannot be Instantiated
Posted by: Guest on December-28-2021

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