How does the height of an AVL tree compare to that of a Red-Black tree?

Practice Questions

Q1
How does the height of an AVL tree compare to that of a Red-Black tree?
  1. AVL trees are always shorter.
  2. Red-Black trees are always shorter.
  3. They have the same height.
  4. AVL trees are shorter in the worst case.

Questions & Step-by-Step Solutions

How does the height of an AVL tree compare to that of a Red-Black tree?
  • Step 1: Understand what an AVL tree is. It is a type of binary search tree that maintains balance by ensuring the heights of the two child subtrees of any node differ by at most one.
  • Step 2: Understand what a Red-Black tree is. It is another type of binary search tree that uses color properties (red and black) to ensure the tree remains balanced during insertions and deletions.
  • Step 3: Compare the balancing methods. AVL trees are more strictly balanced than Red-Black trees, meaning they keep their height smaller by enforcing stricter rules on balance.
  • Step 4: Consider the height of both trees. Because AVL trees are more strictly balanced, they tend to have a shorter height in the worst-case scenario compared to Red-Black trees.
  • Step 5: Conclude that in general, AVL trees will have a height that is less than or equal to that of Red-Black trees, especially in the worst case.
  • AVL Trees vs. Red-Black Trees – AVL trees maintain a stricter balance than Red-Black trees, resulting in a generally shorter height.
  • Tree Height – The height of a tree affects its performance in search, insert, and delete operations.
  • Balancing Techniques – Understanding the balancing techniques used in AVL and Red-Black trees is crucial for comparing their heights.
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