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|Interview Questions and Answers|
|Ans. Shutdown hook is a thread that is invoked implicitly by JVM just before the shut down. It is used to clean up unused resources.|
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|What are different ways to create String Object? Explain.|
|Difference between JVM, JRE and JDK ?|
|What are various types of Class loaders used by JVM ?|
|Explain java.lang.OutOfMemoryError ?|
|What are strong, soft, weak and phantom references in Java ?|
|Which memory areas does instance and static variables use ?|
|Can we call the garbage collector explicitly ?|
|Why Java provides default constructor ?|
|Can I import same package/class twice? Will the JVM load the package twice at runtime?|
|Different types of memory used by JVM ?|