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session attribute

 
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a)A session attribute can only be a data type that implements the serializable interface
b)A container may throw an IllegalArgumentException in the setAttribute()
method of HttpSession if the attribute is not Serializable.

which statement is true?Please help.Thanks in Advance
 
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Could you please tell where you got those questions from ? And what do you think about it ?
 
James Mark
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statement a is from MarcusGreen Summary Quiz 2
statment b is from Manning Book
 
Christophe Verré
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Thank you for quoting your source. I don't think that objects must be Serializable, but it must be a consideration if you are using a distributed environment, where sessions may be migrated. So neither a nor be are correct.
 
Consider Paul's rocket mass heater.
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