Is this a valid initialization ? Explain.<br /> <br /> Collection<Collection> collection = new LinkedList<LinkedList>();
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 Q1. Is this a valid initialization ? Explain.

Collection<Collection> collection = new LinkedList<LinkedList>();		Core Java
Ans. No. It will result in a type mismatch error.

Collection<Collection> collection = new LinkedList<Collection>();

is a valid initialization as collection being reference of "Collection" class can hold object of derived Class "LinkedList" due to runtime Polymorphism. Runtime polymorphism is not applicable to type arguments.

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