Problem
1. Explain the difference between concurrent transactions and simultaneous transactions. How many CPUs are required for simultaneous transactions?
2. Give an example, other than the one in this text, of the lost update problem.
3. Define the terms dirty read, nonrepeatable read, and phantom read.
4. Explain the difference between an explicit lock and an implicit lock.
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.