A(n) ________ is a small repair made to an operating system or program to close a security hole

A(n) ______ is an instance of a class.

a) method b) data field c) interface d) object

If we do not have a header node, why is removing the first node of a linked list a special case?

A. The first node is the most complicated node of the entire linked list. B. It complicates the insertions that might take place afterwards, since insertions take place at the beginning of the linked list. C. If we don’t do it properly, there is memory leak for the rest of the nodes in the list; if we don’t remove any other node properly, there is no danger of memory leak. D. We need to move the start pointer when removing the first node, but not when removing any other nodes.