Which is the most restrictive isolation level in transaction?(a) Repeatable Read(b) Snapshot(c) Read Committed(d) SERIALIZABLEI had been asked this question in examination.I'd like to ask this question from Locking topic in chapter Performance Tuning and Optimization of SQL Server

Which is the most restrictive isolation level in transaction?(a) Repea

1.	Which is the most restrictive isolation level in transaction?(a) Repeatable Read(b) Snapshot(c) Read Committed(d) SERIALIZABLEI had been asked this question in examination.I'd like to ask this question from Locking topic in chapter Performance Tuning and Optimization of SQL Server
Answer» CORRECT answer is (d) SERIALIZABLE The best explanation: When SERIALIZABLE isolation level is set – a range LOCK is placed on the data set, preventing other users from updating or INSERTING rows into the data set until the TRANSACTION is complete.

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