What is transaction isolation and why it is important?
Isolation means that the data used during the execution of a transaction cannot be used by a second transaction until the first one is completed. In other words, if transaction T1 is being executed and is using the data item X, that data item cannot be accessed by any other transaction (T2 ... Tn) until T1 ends. This property is particularly useful in multiuser database environments because several users can access and update the database at the same time.
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Annual reports ________
A) are required to be prepared by every corporation B) discuss the company's competitors and the risks related to the company's business C) are also called a Form 10-Q D) only include the company's financial statements
Which of the following terms refers to an incremental implementation of a marketing plan that allows for feedback and corrective adjustments early in the implementation process?
A) adaptive persistence B) adaptive rollout C) channel strategy D) marketing mix E) benchmarking