Explanation: Concurrency is a property of systems in which several computations are executing simultaneously, and potentially interacting with each other. 8. All lock information is managed by a ____, which is responsible for assigning and policing the locks used by the transactions.
A. Scheduler
B. DBMS
C. Lock manager
D. Locking agent
Answer:A
Explanation: Concurrency is a property of systems in which several computations are executing simultaneously, and potentially interacting with each other. 8. All lock information is managed by a ____, which is responsible for assigning and policing the locks used by the transactions.
A. Scheduler B. DBMS C. Lock manager D. Locking agent
Explanation: A distributed lock manager (DLM) provides distributed software applications with a means to synchronize their accesses to shared resources. 9. The ____ lock allows concurrent transactions to access the same row as long as they require the use of different fields within that row.