2_oracle dba面试题集.doc

Oracle笔试题 oracle DBA 面试题及答案(国外公司) oracle数据库笔试题 DBA 国际大公司Oracle 面试笔试题 oracle Database DBA Interview Questions 　　1. How many memory layers are in the shared pool? 　　2. How do you find out from the RMAN catalog if a particular archive log has been backed-up? 　　3. How can you tell how much space is left on a given file system and how much space each of the file systems subdirectories take-up? 　　4. Define the SGA and： 　　? How you would configure SGA for a mid-sized OLTP environment? 　　? What is involved in tuning the SGA? 　　5. What is the cache hit ratio， what impact does it have on performance of an oracle database and what is involved in tuning it? 　　6. Other than making use of the statspack utility， what would you check when you are monitoring or running a health check on an oracle 8i or 9i database? oracle Database 　　7. How do you tell what your machine name is and what is its IP address? 　　8. How would you go about verifying the network name that the local_listener is currently using? 　　9. You have 4 instances running on the same UNIX box. How can you determine which shared memory and semaphores are associated with which instance? 　　10. What view(s) do you use to associate a users SQLPLUS session with his o/s process? Oracle DBA面试题更新 oracle DBA 面试题更新 数据库切换日志的时候，为什么一定要发生检查点？这个检查点有什么意义？ 表空间管理方式有哪几种，各有什么优劣。 本地索引与全局索引的差别与适用情况。 一个表a varchar2(1),b number(1),c char(2)，有100000条记录，创建B-Tree索引在字段a上，那么表与索引谁大？为什么？ 9i的data guard有几种模式，各有什么差别。 执行计划是什么，查看执行计划一般有哪几种方式。 简单描述一下nest loop与hash join的差别。 db file sequential read与db file scattered read等待的差别，如果以上等待比较多，证明了什么问题？ library cache pin与library cache lock是什么地方的等待事件，一般说明什么问题？ 在一个24*7的应用上，需要把一个访问量很大的1000万以上数据级别的表的普通索引(a,b)修改成唯一约束(a,b,c)，你一般会选择怎么做，请说出具体的操作步骤与语句。 如果一个linux上的oracle数据库系统突然变慢，你一般从哪里去查找原因。 说明一下对raid5与raid01/10的认识。 列举5个10g的新特性 oracle面试问题 oracle面试题汇总 之一 一：SQL tuning 类 1:列举几种表连接方式 2:不借助第三方工具，怎样查看sql的执行计划 3:如何使用CBO,CBO与RULE的区别 4:如何定位重要(消耗资源多)的SQL 5:Oracle中如何跟踪某个session的S