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Explain What should the return type of method where there is no return value?

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What should the return type of method where there is no return value? (a) Null (b) Empty collection (c) Singleton collection (d) Empty String I have been asked this question in quiz. I'm obligated to ask this question of Coding best practices topic in chapter Autoboxing & Miscellaneous of Java Select the correct answer from above options

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Right option is (b) Empty collection Explanation: Returning Empty collection is a good practice. It eliminates chances of unhandled null pointer exceptions.

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