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Jvm thrown exceptions & programmatically thrown exceptions

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Can anybody please explain what is JVM thrown exception and Programatically thrown exception. this is a question from java.Inquisition mock exam.

Fill in the table to indicate which Exception and Error classes are typically thrown programatically and which by the JVM.

This is the answer.

ArrayIndexOutOfBoundsException by JVM

ClassCastException by JVM

IllegalArgumentException Programatically

IllegalStateException Programatically

NullPointerException by JVM

NumberFormatException Programatically

AssertionError Programatically

ExceptionInInitializerError by JVM

StackOverflowError by JVM

NoClassDefFoundError by JVM

both NumberFormatException and StackOverfowError are unchecked exceptions
then why one is thrown programatically and another by JVM.

It is confusing.Can any body explain, or refer book .

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K &B book has explained ,on what basis they are categorrized.

IllegalState,...IllegalArgument,Numberformat..were decided by API developers that if argument entered is worng,exception should be thrown
so not thrown by JVM.
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