Answer Posted / deepak verma

Synchronized static method means, the lock belongs to the
class, no other thread can access any static synchronized
method of this class when one thread already holds the lock
of that class.

This class lock is independent of locks on its object. For eg :

Class A {
public static synchronized add() {}

public synchronized void someMethod() {}
}

Here add() and someMethod() can be called concurrently as
add() is having class lock whereas someMethod() having
object lock.

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