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Salesforce.com Software Engineer Interview Question (student candidate)

I interviewed in San Francisco, CA and was asked:
"How does the garbage collector know if an object can be collected?"
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Part of a Software Engineer Interview Review - one of 427 Salesforce.com Interview Reviews

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

- sadhana on Apr 24, 2014

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