Question: What is the default value of a class' instance variables in Java? Always null There's no default value, it must be initialized Depends on data

What is the default value of a class' instance variables in Java?
Always null
There's no default value, it must be initialized
Depends on data type; for numbers it's 0, for boolean it's false, for object references it's null
Always 0
What is the default value of a class' instance

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