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Programmatically thrown exceptions

 
Greenhorn
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I am confused by questions such as  "Which of the following exceptions are always thrown programmatically?"
So I thought this was a distinction between checked and unchecked exceptions, but it seems this isn't the case.

This was one of the qs on the practice exam from Sybex with the following options:
A - ArrayIndexOutOfBounds
B - ExceptionInInitializerError
C - java.io.IOException
D - NullPointerException
E - NumberFormatException

The answer says "All of these exceptions can be thrown programmatically, but the question asks which ones always are. An
IOException is thrown by many methods that read/write files and is always thrown programmatically. Similarly, NumberFormatException is thrown when convering numbers. The other three are thrown by the JVM"

I just can't get my head around what exactly it means by 'programmatically thrown'?
 
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You appear not to have found the correct place for your post; never mind because I shall move you. I hope to the right place

Thank you for telling us where that question comes from; is that Boyarsky and Sellikoff?

What thrown programmatically means is that the exception is the result of a statement like throw new XYZException("Something bad."); That means that methods which read numbers have throw new NumberFormatException("1234567891011121314151617"); in, or similar, and methods to read files have such throw statements for IOException. If you suffer a NullPointerException on the other hand, there may not be a throw statement anywhere.
 
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