What is an object's lock and which object's have locks?<br/>
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 Q1. What is an object's lock and which object's have locks?
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Ans. An object's lock is a mechanism that is used by multiple threads to obtain synchronized access to the object. A thread may execute a synchronized method of an object only after it has acquired the object's lock. All objects and classes have locks. A class's lock is acquired on the class's Class object.

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