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In crabbing protocol, the lock obtained on the root node is in _________ mode.

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In crabbing protocol, the lock obtained on the root node is in _________ mode.

(a) Shared

(b) Exclusive

(c) Read only

(d) None of the mentioned

I got this question during an online interview.

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

1 Answer

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Best answer
Right choice is (a) Shared

The best explanation: Crabbing protocol moves in a crab like manner down the index tree.

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