This edition is focused only on linked lists: nodes, next pointers, traversal, insertion, deletion, reversing, middle node, cycle detection, merging sorted lists, and removing the nth node from the end.
Linked lists are important because they teach students to think beyond array indexing. They build real pointer discipline.
A linked list is a chain of nodes. Every safe solution depends on preserving the next pointer before changing links.
current = head
while current is not None:
print(current.data)
current = current.nextnext. There is no direct jump to index 5 like a normal Python list.Use the embedded practice viewer below. Try every question first, then compare with the explanation and final code.
Linked list questions reveal whether a student understands state changes. In arrays, many operations feel automatic. In linked lists, every arrow must be handled intentionally.
This is why linked lists are still a useful interview topic. They test clarity, patience, and disciplined pointer movement.