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LLRB maintains 1-1 correspondence with 2–3 trees.

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LLRB maintains 1-1 correspondence with 2–3 trees.

(a) True

(b) False

This is a very interesting question from B-Trees topic in section B-Trees of Data Structures & Algorithms I

The question was posed to me during an online exam.

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Right option is (a) True

Easiest explanation - LLRB (Left Leaning Red Black tree)is the data structure which is used to implement the 2-3 tree with very basic code. The LLRB is like the 2-3 tree where each node has one key and two links. In LLRB the 3-node is implemented as two 2-nodes connected by the red link that leans left. Thus, LLRB maintains 1-1  correspondence with 2–3 tree.

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