What is LinkedListNode in Java

Question

Excuse my ignorance but I am beginning to prepare for my first technical interview and came across this question and answer on the topic linkedlist

Question: Imp

Answer 1

The important details in this question pertain to data structures, java is just the language that is being used to implement in this case.
You should read the wikipedia article about linked lists, and for this question be careful that your solution doesn't produce any dangling references or orphan nodes.
Do some searches on the two terms in bold, and make sure that you understand them