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SCJP 5.0 - Enum Mock Questions - 1
Q1)Select all the correct statements regarding Enums (Select any 2 options)
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a) All enums are subclasses of interface java.lang.Enum.
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b) Enums is simply a data structure and hence it is not compiled to a
.class file.
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c) Enums enable you to define a new data type. For example, If you create
an Enum 'Days' you can declare a variable of type 'Days'.
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d) All instances of Enums are serializable by default.
Answer:
Q1)c, d
Explanation :
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a) java.lang.Enum is a class and not an interface.
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b) Enums are compiled to a .class file.
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c) Enums enable you to define a new data type, in a manner similar to the
way a class allows you to define a new data type.
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d) Enums are subclasses of class java.lang.Enum, which implements the
interface java.io.Serializable. If a class implements the interface
java.io.Serialisable, its objects are serializable.
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