Can java list be null?
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Why singleton pattern is better than creating singleton class with static instance?
Marker interface means , interface which has no methods.Then what is the necessity of its usage.I read "it tells the compiler that it should be treated differently ". "It is used to store state of an object". But still am not clear.Please explain clearly.
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Does garbage collection guarantee that a program will not run out of memory?
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What is the default access specifier for variables and methods of a class?
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