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Explain Which of these interfaces is implemented by TimerTask class?

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Which of these interfaces is implemented by TimerTask class? (a) Runnable (b) Thread (c) Observer (d) ThreadCount I got this question by my college director while I was bunking the class. This interesting question is from Observable & Timer Class in section java.util – More Utility Classes of Java Select the correct answer from above options

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The correct answer is (a) Runnable Explanation: None.

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