Explanation: Timestamp is allotted when execution of a transaction begins. Explanation: In snapshot isolation, each transaction is given its own version or snapshot of the database on which it can operate.

Which of the following is a transaction isolation level?

InnoDB offers all four transaction isolation levels described by the SQL:1992 standard: READ UNCOMMITTED , READ COMMITTED , REPEATABLE READ , and SERIALIZABLE .

Which one of the following is the highest isolation level in transaction management?

Serializable is the highest isolation level in transaction management.