Implementing a list with a sentinel node or dummy node as the first node eliminates the special cases dealing with the first node.

Name: Implementing a list with a sentinel node or dummy node as the first node eliminates the special cases dealing with the first node.
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Using a sentinel or dummy node simplifies the implementation by eliminating the need to check for and handle special cases related to the first node, such as inserting or deleting at the beginning of the list.

Implementing a List with a Sentinel Node or Dummy Node