How does the garbage collector know if an object can be collected?

Question

sadhana · Accepted Answer

1.when the object is no longer referenced by anyother object.
2. when the obj is defined null

Anonymous · Answer

Reference counting is a form of garbage collection whereby each object has a count of the number of references to it. Garbage is identified by having a reference count of zero. An object's reference count is incremented when a reference to it is created, and decremented when a reference is destroyed. When the count reaches zero, the object's memory is reclaimed. (Wikipedia)

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