Consider the following algorithm for inserting a node in a list:Algorithm insertNode(list, pPre, dataIn) allocate (pNew) set pNew data to dataIn if (pPre null) set pNew link to list head set list head to pNew else set pNew link to pPre link set pPre link to pNew end if return trueend insertNodeWhat special case does the "if (pPre null)" condition test for?
A. Adding before the first node.
B. Adding to an empty list.
C. Adding before the first node or to an empty list.
D. Adding at the end of the list.
Answer: C
Computer Science & Information Technology
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