Runnable is an interface.
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Q. Which is the Superclass of Wrapper types like Byte, Short, Integer, Long, Float and Double?
Q. Which of these method(s) is/are used for writing bytes to an outputstream?
Q. In Java, arrays are objects of which class?
Q. Which of these method of Object class is used to obtain class of an object at run time?
Q. How do you check if an element exists in an array or ArrayList in Java?
Q. Which technology do we mix our business logic with the presentation logic?
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