Question: JAVA LANGUAGE (1) What is the difference between an internal and an external method call? In what situation would only internal calls be needed? (2)

JAVA LANGUAGE

(1) What is the difference between an internal and an external method call? In what situation would only internal calls be needed?

(2) If a method given an ArrayList as a parameter calls a second method giving it the same ArrayList, and that second method deletes one of the elements, will this change be visible in the first ArrayList? Explain your answer.

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