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garbage collection!!

 
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Q.58.At what point is the object obj eligible for garbage collection?(sun's mock2)
(Select one correct answer)
public class Test058 {
public String m() {
Object obj = new String("");
String str = null; //1
str = (String)obj; //2
obj = null; //3
return str;
}
}
A: After line //1.
B: After line //2.
C: After line //3.
D: Never
Ans -The object is returned by the method and not eligible for garbage collection during
the lifetime of the method.

--> i think even after returning from the method, the object earlier referenced by obj may or not may not(if it is assigned to some ref. variable in the caller method) eligible for garbage collection. Am i right here??
ashok.
 
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Yes you're right, the answer should be "Can't say" since we don't know the code of the caller method so we can't state anything about when the object will be gced...
But if the answer was to stay "Never" I would modify the question like this : "When will the object obj be garbage-collected in the lifetime (i.e. during the execution) of this method ?" Answer "Never" (in this method, but maybe in the caller method)
Sun what do you think ??
Val
[This message has been edited by Valentin Crettaz (edited September 24, 2001).]
 
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