Start by clarifying the problem constraints (iterative vs recursive, in-place, etc.) and then walk through the iterative two-pointer approach with a diagram. Emphasize edge cases and complexity analysis, and if time permits, mention the recursive alternative.
Pro tip: Demonstrate strong communication by thinking aloud and drawing the list on a whiteboard; this shows Google you can collaborate and reason visually, not just code.
Ask if the list is singly or doubly linked, if it should be reversed in-place, and if recursion is allowed. Confirm the function signature and return type.
Describe using three pointers: prev, curr, and next. Walk through the process of reversing the links one by one until curr becomes null.
Mention empty list, single node, and two nodes. Ensure your solution handles these without errors.
State that the iterative solution runs in O(n) time and O(1) space. For recursive, O(n) time and O(n) space due to call stack.
If asked or if time permits, briefly explain the recursive approach: reverse the rest of the list and adjust pointers. Highlight trade-offs.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.