Which one is true statement :
A. With finer degree of granularity of locking a high degree of concurrency is possible.
B. Locking prevents non – serializable schedules.
C. Locking cannot take place at field level.
D. An exclusive lock on data item X is granted even if a shared lock is already held on X.
Answer:A
Which one is true statement :
A. With finer degree of granularity of locking a high degree of concurrency is possible. B. Locking prevents non – serializable schedules. C. Locking cannot take place at field level. D. An exclusive lock on data item X is granted even if a shared lock is already held on X.