A sentinel, or dummy, node can be used at the front of a linked list. What purpose does this serve?
What will be an ideal response?
When adding and removing nodes from a linked list, the first node of the list is treated as a special case. This
is because the list reference variable points to this node and will have to be adjusted if a node is added to or removed from the
head. With the use of a dummy node, the reference to the top of the list will never change (it will always refer to the dummy
node), so the operations of adding and removing nodes can be simplified.
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