1.

Which of the following is the most expensive method?(a) Timestamping(b) Plain locking(c) Predicate locking(d) Snapshot isolationI have been asked this question during an online interview.My doubt stems from Serializability topic in section Transactions of RDBMS

Answer»

The correct OPTION is (c) Predicate locking

For EXPLANATION: Predicate locking is the most EXPENSIVE method and is generally not used in most databases.



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