Beginner
Data Structures & Algorithms
Q40 / 100
What is a sentinel node in a linked list?
Correct! Well done.
Incorrect.
The correct answer is B) A dummy node at the head or tail to simplify edge cases in insert/delete operations
B
Correct Answer
A dummy node at the head or tail to simplify edge cases in insert/delete operations
Explanation
Sentinel (dummy) nodes eliminate special cases for empty lists or boundary conditions, simplifying code at the cost of one extra node.
Progress
40/100