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________ allows only committed data to be read, but does not require repeatable reads(a) Read uncommitted(b) Serializable(c) Repeatable read(d) Read committedI had been asked this question during an interview.My question is from Transaction Isolation Levels in division Transactions of RDBMS |
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Answer» RIGHT answer is (d) READ committed The EXPLANATION: Read committed allows only committed data to be read, but does not REQUIRE repeatable reads. For instance, between TWO reads of a data item by the transaction, another transaction may have updated the data item and committed. |
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