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The nodes in a skip list may have many forward references. their number is determined

(a) probabilistically

(b) randomly

(c) sequentially

(d) orthogonally

Asked question is from Skip List in chapter Types of Lists of Data Structures & Algorithms I

This question was posed to me in examination.

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Best answer
Right answer is (a) probabilistically

Easy explanation - The number of forward references are determined probabilistically, that is why skip list is a probabilistic algorithm.

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