What are the most important topics in Java interviews for a fresher?

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Unlimited learning from classes 6 to 10 (Mathematics) and Programming languages (C,C++,Java)

Exception handling, String, Collections, OOPs concept, multithreading
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OOPS Multithreding String Handling Execption Handling Collection Freamwork JDBC Servlet Jsp Spring core Moudle Spring MVC
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String, Collection, Thread, JDBC
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Collection
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static , inheritence, Generics, interface and abstract , loops -pattern programs, sorting and searching
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Oops , strings , exceptional handling
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Can a class have interface and vice-versa?
Interface is used to support multiple inheritance only.
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compiler compiles whole page or file at one time but interpreter executes line by line like we do using debugger
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Blindly go for oracle certification java program .
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