1. [单选题]Which of the following is not responsibility of DBA(Data Base Administrator)?
A. Database management system design
B. Database schema definition
C. Database schema modification
D. Integrity constraint specification
2. [单选题]In a certain cache system, the modified cache block is written to main memory only when the block is replaced.All of following are used to describe this policy EXCEPT
A. store-in
B. write-back
C. copy-back
D. write-through
3. [单选题]下列选项中不是预防死锁的措施的是
A. 采用资源的静态分配策略
B. 剥夺其他进程占用的资源
C. 使用银行家算法
D. 采用资源的有序分配法
