Answered

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Which guarantee(s) does Spanner NOT provide?

(A) If o ers a multi-version, temporal database where data is versioned and each version is timestamped with its commit time.
(B) It provides concurrency control using a lock table that keeps state for two-phase locking
(C) It o ers external consistency via its TrueTime API
(D) It supports nonatomic schema changes.

Sagot :

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