Question
Which method must be defined by a class implementing the java.lang.Runnable interface?
Answer: Option B
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Option B is correct because in an interface all methods are abstract by default therefore
they must be overridden by the implementing class. The Runnable interface only contains
1 method, the void run() method therefore it must be implemented.
Option A and D are incorrect because they are narrowing the access privileges i.e. package
(default) access is narrower than public access.
Option C is not method in the Runnable interface therefore it is incorrect.
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