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Oracle DBA

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国外公司的Oracle DBA试题

Oracle DBA Interview Questions By B G
  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 system's 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?
  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 user's SQLPLUS session with his o/s process?
  11. What is the recommended interval at which to run statspack snapshots, and why?
  12. What spfile/init.ora file parameter exists to force the CBO to make the execution path of a given statement use an index,
  even if the index scan may appear to be calculated as more costly?
  13. Assuming today is Monday, how would you use the DBMS_JOB package to schedule the execution of a given procedure owned by
  SCOTT to start Wednesday at 9AM and to run subsequently every other day at 2AM.
  14. How would you edit your CRONTAB to schedule the running of /test/test.sh to run every other day at 2PM?
  15. What do the 9i dbms_standard.sql_txt() and dbms_standard.sql_text() procedures do?
  16. In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully
  refreshed?
  17. How would you best determine why your MVIEW couldn't FAST REFRESH?
  18. How does propagation differ between Advanced Replication and Snapshot Replication (readonly)?
  19. Which dictionary view(s) would you first look at to understand or get a high-level idea of a given Advanced Replication
  environment?
  20. How would you begin to troubleshoot an ORA-3113 error?
  21. Which dictionary tables and/or views would you look at to diagnose a locking issue?
  22. An automatic job running via DBMS_JOB has failed. Knowing only that "it's failed", how do you approach troubleshooting
  this issue?
  23. How would you extract DDL of a table without using a GUI tool?
  24. You're getting high "busy buffer waits" - how can you find what's causing it?
  25. What query tells you how much space a tablespace named "test" is taking up, and how much space is remaining?
  26. Database is hung. Old and new user connections alike hang on impact. What do you do? Your SYS SQLPLUS session IS able to
  connect.
  27. Database crashes. Corruption is found scattered among the file system neither of your doing nor of Oracle's. What
  database recovery options are available? Database is in archive log mode.
  28. Illustrate how to determine the amount of physical CPUs a Unix Box possesses (LINUX and/or Solaris).
  29. How do you increase the OS limitation for open files (LINUX and/or Solaris)?
  30. Provide an example of a shell script. which logs into SQLPLUS as SYS, determines the current date, changes the date format
  to include minutes & seconds, issues a drop table command, displays the date again, and finally exits.
  31. Explain how you would restore a database using RMAN to Point in Time?
  32. How does Oracle guarantee data integrity of data changes?
  33. Which environment variables are absolutely critical in order to run the OUI?
  34. What SQL query from v$session can you run to show how many sessions are logged in as a particular user account?
  35. Why does Oracle not permit the use of PCTUSED with indexes?
  36. What would you use to improve performance on an insert statement that places millions of rows into that table?
  37. What would you do with an "in-doubt" distributed transaction?
  38. What are the commands you'd issue to show the explain plan for "select * from dual"?
  39. In what script. is "snap$" created? In what script. is the "scott/tiger" schema created?
  40. If you're unsure in which script. a sys or system-owned object is created, but you know it's in a script. from a specific
  directory, what UNIX command from that directory structure can you run to find your answer?
  41. How would you configure your networking files to connect to a database by the name of DSS which resides in domain
  icallinc.com?
  42. You create a private database link and upon connection,
  fails with: ORA-2085: connects to .
  What is the problem? How would you go about resolving this error?
  43. I have my backup RMAN script. called "backup_rman.sh". I am on the target database. My catalog username/password is
  rman/rman. My catalog db is called rman. How would you run this shell script. from the O/S such that it would run as a
  background process?
  44. Explain the concept of the DUAL table.
  45. What are the ways tablespaces can be managed and how do they differ?
  46. From the database level, how can you tell under which time zone a database is operating?
  47. What's the benefit of "dbms_stats" over "analyze"?
  48. Typically, where is the conventional directory structure chosen for Oracle binaries to reside?
  49. You have found corruption in a tablespace that contains static tables that are part of a database that is in NOARCHIVE
  log mode. How would you restore the tablespace without losing new data in the other tablespaces?
  50. How do you recover a datafile that has not been physically been backed up since its creation and has been deleted.
  Provide syntax example.
 
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2006-04-01
Oracle DBA面试题
面试Oracle配置管理应用服务器JavaScript
IT工作市场是如此的紧张,每个可获得的职位都有一堆人在申请。Naveen Nahata为Oracle E-Business Suite的数据库管理员申请者提供了以下一些面试时的技术问题,它可以帮助申请者们快速脱颖而出。如果你的面试官有类似的问题问你,发个邮件给我,我将会把它添加在列表中。――编者按
  问题
  1如果信息采集管理系统(ICM)崩溃了怎么办?
  2你如何加速打补丁的过程?
  3打补丁的过程中出错了,你怎么办?
  4请提供克隆过程和克隆之后采取的手工操作的大概步骤。
  5介绍一下AutoConfig。AutoConfig是如何知道XML文件中的哪个树脂需要被放入哪一个文件的?
  6你能告诉我,你对一个发生故障的自服务登录问题做哪些测试吗?你要检查哪个配置文件操作选项和文件?
  7如果你不能看到并发管理日志和输出文件,是哪里出错了?
  8你是如何更改并发管理日志和输出文件的位置的?
  9如果用户正遇到性能方面的问题,你如何找到问题的原因?
  10你如何更改应用程序的密码?
  11请写出DBC文件的位置,并且解释它的重要性和应用程序如何知道DBC文件名?
  答案
1所有其他的管理器都会继续工作。ICM只会处理队列控制请求,意思是开启和关闭其他并发的管理器。
  2
  2.1你可以合并多个补丁。
  2.2你可以为一个非交互的补丁创建一个响应文件。
  2.3你可以通过选项(nocompiledb, nomaintainmrc, nocompilejsp)来应用补丁,并且在应用了所有的补丁之后,一次运行它们。
  3 查看失败工作的日志,找到并且纠正错误,用adctrl 工具重新开启工作。
4在源文件上(所有层)运行pre-clone,使用RMAN复制数据库(或者从热或者冷备份中重新存储数据库),拷贝文件系统,然后在目标文件(所有层)上运行post-clone 。
  手工步骤(可能会更多):
  4.1改变所有的非网站配置选项数值(快速克隆的话,只改变网站级别的配置文件选项)。
  4.2 修改工作流和并发管理器表。
  4.3更改打印机。
  5 AutoConfig 使用了一个上下文文件来维护关键的配置文件。一个上下文文件就是一个XML文件,在$APPL_TOP/admin 目录下,进行集中式的存储。
  当你运行AutoConfig 的时候,它读取XML文件,并且创建所有的AutoConfig 管理配置文件。
  对于AutoConfig维护的每个配置文件,都存在一个临时文件来判断哪个数值是从哪个XML文件中得来的。
  6
  6.1检查DBC文件中的guest的用户名和密码,配置选项guest的用户名和密码、数据库。
  6.2查看apache/jserv是否启动了。
  6.3运行IsItWorking, FND_WEB.PING, aoljtest等。
  7很有可能是FNDFS监听器停止了。看看FND_CONCURRENT_REQUESTS 表中的OUTFILE_NODE_NAME 和 LOGFILE_NODE_NAME 的数值。看看FND_NODES 表。看看tnsnames.ora 中的FNDFS_ entry 。
  8日志问卷爱女的位置是由$APPLCSF/$APPLLOG 参数来决定的,输出文件的位置是由$APPLCSF/$APPLOUT 决定的。
  9
  9.1追踪这个会话(用等待)并且使用tkprof 来分析追踪文件。
  9.2生成statspack 报告并进行分析。
  9.3使用top/iostat/sar/vmstat 监控O/s 。
  9.4通过ping这类基本的测试结果来判断网络的瓶颈。
  10
  10.1 使用FNDCPASS 来更改APPS密码。
  10.2 手工修改wdbsvr.app/cgiCMD.dat 文件。
  10.3 更改所有从其他环境指过来的数据库链接。
  11
  11.1位置:$FND_TOP/secure directory
  11.2 重要性:在其他事务中指向数据库服务器。
  11.3 应用程序通过使用“Applications Database Id.”来了解DBC文件的名字。
 
 
 

  1所有其他的管理器都会继续工作。ICM只会处理队列控制请求,意思是开启和关闭其他并发的管理器。
  2
  2.1你可以合并多个补丁。
  2.2你可以为一个非交互的补丁创建一个响应文件。
  2.3你可以通过选项(nocompiledb, nomaintainmrc, nocompilejsp)来应用补丁,并且在应用了所有的补丁之后,一次运行它们。
  3 查看失败工作的日志,找到并且纠正错误,用adctrl 工具重新开启工作。
IT工作市场是如此的紧张,每个可获得的职位都有一堆人在申请。Naveen Nahata为Oracle E-Business Suite的数据库管理员申请者提供了以下一些面试时的技术问题,它可以帮助申请者们快速脱颖而出。如果你的面试官有类似的问题问你,发个邮件给我,我将会把它添加在列表中。――编者按
  问题
  1如果信息采集管理系统(ICM)崩溃了怎么办?
  2你如何加速打补丁的过程?
  3打补丁的过程中出错了,你怎么办?
  4请提供克隆过程和克隆之后采取的手工操作的大概步骤。
  5介绍一下AutoConfig。AutoConfig是如何知道XML文件中的哪个树脂需要被放入哪一个文件的?
  6你能告诉我,你对一个发生故障的自服务登录问题做哪些测试吗?你要检查哪个配置文件操作选项和文件?
  7如果你不能看到并发管理日志和输出文件,是哪里出错了?
  8你是如何更改并发管理日志和输出文件的位置的?
  9如果用户正遇到性能方面的问题,你如何找到问题的原因?
  10你如何更改应用程序的密码?
  11请写出DBC文件的位置,并且解释它的重要性和应用程序如何知道DBC文件名?
  答案
  
http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript">http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text/javascript">
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金融行业 -招聘Oracle 开发 DBA ,希望版主保留两天,谢谢!!!

招聘 Oracle 开发 DBA
工作 地点 : 北京 朝阳 国贸
最低学历:本科
工作性质:全职,纯甲方
招聘人数:1人

岗位职责:
1、审核数据库设计和SQL语句,对上线数据库质量进行管理;
2、参与和协助项目,对业务逻辑进行数据库开发级别的设计和规划
3、根据线上数据库运行情况和业务情况,对数据库进行优化。
4、开发过程中核心模块的过程,函数,触发器的编写等
5、评估设计人员的数据库设计合理性,SQL层面,实例层面,数据库层面的性能优化。
6、辅助解决开发人员遇到的数据库问题
7、制定和实施数据库开发规范,提升整个开发团队的技术水平。
任职要求:
1、本科及以上学历,计算机或者相关专业,三年以上ORACLE数据库开发相关经验;
2、精通data modeling、sql tuning;
3、对schema的设计有很强的把控能力;
4、良好的沟通技能、团队合作能力;
5、有在银行、第三方支付行业 从事数据库开发者优先考虑。
薪资范围: 8K-16K
招聘邮箱:tonyahf@gmail.com
有合适的朋友也帮忙推荐下,谢谢!!!
 
 
 
 

 

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