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What is use of wildcards?
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- It is used for type argument of generic method
- It is used to access members of super class
- It is used to make code more readable
- It is used in cases when type being operated upon is not known
- None of these
Correct Option: D
The wildcard can be used in a variety of situations: as the type of a parameter, field, or local variable; sometimes as a return type (though it is better programming practice to be more specific). The wildcard is never used as a type argument for a generic method invocation, a generic class instance creation, or a supertype.
