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随笔分类 -  18数据库考试-Oracle考试

摘要:课程目标•理解ORACLE数据库体系架构—内存结构和进程•理解SQL在数据库中的运作流程•理解UNDO&REDO原理•理解commit原理1.Oracle数据库概述•数据库:物理操作系统文件或磁盘的集合。•实例:一组Oracle后台进程/线程以及一个共享内存区,这些内存由同一个计算机上运行的线程/进... 阅读全文

posted @ 2014-01-22 15:47 徐正柱- 阅读(1533) 评论(0) 推荐(1) 编辑

摘要:Q. 1 : When will the rollback information applied in the event of a database crash 1. before the crash occurs 2. after the recovery is complete 3. immediately after re-opening the database bef... 阅读全文

posted @ 2007-06-20 17:54 徐正柱- 阅读(677) 评论(0) 推荐(0) 编辑

摘要:注:答案在选项后面 Q. 1 : The default tablespace clause in the create user command sets the location for 1. Database Objects created by the user 2. Temporary Objects Created By the User 3. System Ob... 阅读全文

posted @ 2007-06-20 17:46 徐正柱- 阅读(393) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : What feature in oracle allows you to monitor Suspicious Activity on the Datbase 1. Replication 2. Auditing 3. Monitoring 4. Tuning Q. 2 : Auditing can be turned on by setting this... 阅读全文

posted @ 2007-06-20 17:40 徐正柱- 阅读(326) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : The Database must be in this mode for the instance to be started 1. MOUNT 2. OPEN 3. NOMOUNT 4. None 3 Q. 2 : When Oracle startups up, what happens if a datafile or redo log file n... 阅读全文

posted @ 2007-06-20 17:38 徐正柱- 阅读(558) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : This symbol, When you put infront of a line in the parameter file, signifies a comment 1. $ 2. @ 3. # 4. ! 3 Q. 2 : When you change a parameter value in the parameter file, when wil... 阅读全文

posted @ 2007-06-20 17:37 徐正柱- 阅读(345) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : What system privilege is required to create a rollback segment ? 1. Create database 2. Create rollback segment 3. Alter database 4. Create segment 2 Q. 2 : Oracle recommends ... 阅读全文

posted @ 2007-06-20 17:35 徐正柱- 阅读(304) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : What option of Exporting allows quicker data extractions 1. Grants =y 2. Consistent =y 3. Direct = true 4. Direct=y 4 : Direct=y option bypasses the SQL layer to allow quicker data ex... 阅读全文

posted @ 2007-06-20 17:33 徐正柱- 阅读(405) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : Physical Disk Resources in an Oracle Database are 1. Control Files 2. Redo Log Files 3. Data Files 4. All of the above 4 Q. 2 : What is a Schema 1. A Physical Organization of Obje... 阅读全文

posted @ 2007-06-20 17:30 徐正柱- 阅读(427) 评论(0) 推荐(0) 编辑

摘要:Q. 1 : Oracle immediately re-uses the space assigned to row-directory portion of the data block once you delete the corresponding rows. 1. True 2. False 2 Q. 2 : Which of the following... 阅读全文

posted @ 2007-06-20 17:29 徐正柱- 阅读(344) 评论(0) 推荐(0) 编辑

摘要:一份DBA试题注:以下题目,可根据自己情况挑选题目作答,不必全部作答您也可以就相关问题直接找负责面试人员面述而不笔答 一:SQL tuning 类1:列举几种表连接方式 hash join/merge join/nest loop(cluster join)/index join 2:不借助第三方工具,怎样查看sql的执行计划 set autot on explain plan set st... 阅读全文

posted @ 2007-06-20 17:24 徐正柱- 阅读(647) 评论(0) 推荐(0) 编辑

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