Which of the following statements about interfaces are true?
Since interfaces have no instance variables, the classes that implement them must also have no instance variables.
Interfaces could have static variables.
If a class implements an interface, it must be exact.
It cannot have method names that match the names of methods in the interface unless the parameters match exactly.
A class may not implement two different interfaces if they contain the same method signatures.
Because it has no code, an interface is never instantiated.
Solution
Ans:
A class may not implement two different interfaces if they contain the same method signatures.
Because it has no code, an interface is never instantiated.
Please find some points about interface:
You cannot instantiate an interface.
An interface does not contain any constructors.
All of the methods in an interface are abstract.
An interface cannot contain instance fields. The only fields that can appear in an interface must be declared both static and final.
An interface is not extended by a class; it is implemented by a class.
An interface can extend multiple interfaces.
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MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
Which of the following statements about interfaces are true- Since int.docx
1. Which of the following statements about interfaces are true?
Since interfaces have no instance variables, the classes that implement them must also have no
instance variables.
Interfaces could have static variables.
If a class implements an interface, it must be exact.
It cannot have method names that match the names of methods in the interface unless the
parameters match exactly.
A class may not implement two different interfaces if they contain the same method signatures.
Because it has no code, an interface is never instantiated.
Solution
Ans:
A class may not implement two different interfaces if they contain the same method signatures.
Because it has no code, an interface is never instantiated.
Please find some points about interface:
You cannot instantiate an interface.
An interface does not contain any constructors.
All of the methods in an interface are abstract.
An interface cannot contain instance fields. The only fields that can appear in an interface must
be declared both static and final.
An interface is not extended by a class; it is implemented by a class.
