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B-link tree requires a pointer to its __________ sibling.

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B-link tree requires a pointer to its __________ sibling.

(a) Upper

(b) Lower

(c) Right

(d) Left

This question was posed to me in a job interview.

This question is from Concurrency in Index Structures in section Concurrency Control of Database Management

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Best answer
Right choice is (c) Right

Best explanation: This pointer is required because a lookup that occurs while a node is being split may have to search not only that node but also that node’s right sibling.

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