Test#2 CS488 Fall 2017 8. ensures that the schedule for the concurrent execution of several transactions should yield consistent results. a. Atomicity b. Isolation c. Durabilty d. Serializability 9. A(n) condition occurs when two or more transactions wait for ach other to unlock data. a. deadlock b. exclusive lock d. two-phase lock c. binary lock 10. In the optimistic approach for concurrency control, during the phase, a transaction scans the database, executes the needed computations, and makes the updates to a private copy of the database values. a. read c. write b. validation d. shared