2022年ORACLEDBA面试题集 .pdf
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1、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?Sqlplus shared pool and private pool.2.How do you find out from the RMAN catalog if a particular archive log has been backed-up?3.How can you tel
2、l how much space is left on a given file system and how much space each of the file systems subdirectories take-up?Table_space 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
3、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
4、 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 SQLPL
5、US 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?答:触发 dbwr 的执行,dbwr 会把和这个日志相关的所有脏队列写到数据文件里,缩短实例恢复所需要的时间。当需要对被修改的数据写回数据文件时就产生重做日志的交替写(Switch),这时就出现校验点。系统要把内存中灰数据(修改过)块中的信息写回磁盘的数据文件中,此外系统还将重做日志通知控制文件名师资料总结-精品资料欢迎下载-名师精心整理-第 1 页,共 4 页 -表空间管理方式有哪几种,各有什么优劣
6、。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
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