If needed to split a node or coalesce it with its siblings, or redistribute key values between siblings, the crabbing protocol locks the parent of the node in ____________ mode.
(a) Shared
(b) Exclusive
(c) Read only
(d) None of the mentioned
This question was addressed to me by my college professor while I was bunking the class.
This interesting question is from Concurrency in Index Structures topic in division Concurrency Control of Database Management