How do you perform a left rotation on a node in an AVL tree?

Practice Questions

Q1
How do you perform a left rotation on a node in an AVL tree?
  1. Make the right child the new root of the subtree
  2. Make the left child the new root of the subtree
  3. Swap the node with its parent
  4. No rotation is needed

Questions & Step-by-Step Solutions

How do you perform a left rotation on a node in an AVL tree?
  • Step 1: Identify the node that you want to perform the left rotation on. This node will be called 'X'.
  • Step 2: Identify the right child of node 'X'. This child will be called 'Y'.
  • Step 3: Make 'Y' the new root of the subtree. This means 'Y' will take the place of 'X'.
  • Step 4: Move the left child of 'Y' (if it exists) to be the right child of 'X'.
  • Step 5: Set 'X' as the left child of 'Y'.
  • Step 6: Update any parent pointers if necessary to maintain the structure of the AVL tree.
  • AVL Tree Rotations – Understanding how to perform rotations (left and right) to maintain balance in AVL trees.
  • Tree Structure Manipulation – Knowledge of how to adjust parent-child relationships in a binary tree.
Soulshift Feedback ×

On a scale of 0–10, how likely are you to recommend The Soulshift Academy?

Not likely Very likely