以下SQL操作均在MYSQL上测试过 首先是表定义 1.创建student和score表 CREATE TABLE student ( id ) NOT NULL UNIQUE PRIMARY KEY , name ) NOT NULL , sex ) , birth YEAR, department ) , address ) ); CREATE TABLE score ( id ) NOT NULL UNIQUE PRIMARY KEY AUTO_INCREMENT , stu_id ) N

32. Examine these commands and their output: • SQL> SELECT * FROM emp; • ENO ENAME • ---- ----- • 100 Adam • 101 Alan • SQL> INSERT INTO emp VALUES(102,'Ben"); • 1 row created. • SQL> COMMIT; • Commit completed. • SQL> UPDATE emp SET enam

31.Which two events always request the LGWR to write? A) when LGWR is notified by a server process that performs a Commit or ROLLBACK B) When PMON restarts a server process C) when DBWn writes dirty buffers D) when a log switch occurs E) when a check

30.Which is true when a database instance is shut down? A. Only transactional and normal modes wait for all uncommitted transactions to commit or rollback and then close the database. B. Immediate, transactional, and normal modes all result in a chec

23.Which two are true about data dictionary and dynamic performance views (v$ views)? A) All database users have access to ALL_* views. B) Data dictionary view output is subject to read consistency. C) The defining queries for Oracle supplied dynamic

22.You are planning a software installation for both Oracle Database 11g Release 1 and Release 2. You plan to have at lease one database for each release managed by Grid Infrastructure for a Standalone Server. Which three are true in this scenario? A

21.Which two are true about roles? A) A role can be password-protected. B) A role can be granted to another role. C) Only one default role can be granted to a user. D) A role can be granted only multiple system privileges not multiple object privileg

13.Which two are true about AWR snapshots? A) They are stored In the SYSAUX tablespace. B) They are not generated if STATISTICS_LEVEL Is set to TYPICAL. C) They can be modified by using DMLs. D) They can be retained forever. E) They are always create

11.Which three are true about UNDO data? A) It is used to roll back failed transactions. B) It is used to rewind a database by using FLASHBACK DATABASE. C) It is used to recover dropped tables by using FLASHBACK TABLE … TO BEFORE DROP. D) It is used

一.选择题 1.在登录Linux时,一个具有唯一进程ID号的shell将被调用,这个ID是什么(B)? A.NID B.PID C.UID D.CID 2.下面哪个目录存放用户密码信息(B) A./boot B./etc C./var D./dev 3.(D)不是流行的Linux操作系统. A.Red Hat Linux B.Mac OS C.Ubuntu Linux D.Red Flag Linux 4.关闭linux系统(不重新启动)可使用命令 (B) . A.Ctrl+Alt+Del B.

C#复习⑨ 2016年6月22日 14:28 C#考试题&参考答案:http://pan.baidu.com/s/1sld4K13 Main XML Comments & Pointer XML注释和指针 1.Special Comments 注释很重要!!! 2.XML Tags 有那么些类似于HTML的标签 Predefined Tags Main tags <summary> short description of a program element </summ

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################################################################ 本文内容摘录于老男孩linux实战运维培训中心课前考试题(答案部分) 如有转载,请务必保留本文链接及版权信息. 欢迎广到运维兄弟一起交流linux/unix网站运维技术! 网站运维交流群:114580181 45039636 37081784  老男孩 QQ:31333741  mail:31333741@qq.com ========================

linux下文件删除的原理精华讲解(考试题答案系列) 说明:本文为老男孩linux培训某节课前考试试题及答案分享博文内容的一部分,也是独立成题的,你可以点下面地址查看全部的内容信息.http://oldboy.blog.51cto.com/2561410/791245 5.描述linux下文件删除的原理(记时3分钟)<?xml:namespace prefix="o"> ?xml:namespace> Linux文件删除原理:     Linux是通过link的数量来

choose the best answer: View the Exhibit and examine the structure of the CUSTOMERS table. CUSTOMER_VU is a view based on CUSTOMERS_BR1 table which has the same structure as CUSTOMERS table. CUSTOMERS needs to be updated to reflect the latest informa

1.你创建了一个ASP.net应用程序,该程序将运行在TK公司的WEB站点上.你的应用程序包括100个WEB页面.你想配置你的应用程序,当HTTP代码发生错误时,可显示自定义的错误信息给用户.同时你想当程序发生错误时记录到日志中.你想以最小的配置影响完成该目标,下面的那二件事你必须做?(选二项)(AD) A.为应用程序在Global.asax文件中创建Application_Error过程,来控制ASP.net代码错误: B.为应用程序在Web.config文件中创建Application_Er

8.Which two are true about the Fast Recovery Area (FRA)? A) It should be larger than the database. B) Space management In the FRA Is Influenced by the database backup retention policy. C) A database must be in ARCHIVELOG mode to use the FRA. D) It mu

2019-02-12 16:23:54   2.(4-7) choose the best answer:You need to display the first names of all customers from the CUSTOMERS table that contain thecharacter 'e' and have the character 'a' in the second last position.Which query would give the require

36.Which two are true about roles? A) A role can be granted a combination of system and object privileges and other roles. B) The CONNECT role Is granted automatically to a user when It Is created. C) Roles are owned by SYSTEM. D) The RESOURCE role I

34.Which two can be backed up by using RMAN when a database Is open in ARCHIVELOG mode, so that media recovery can be performed If required? A) control files B) password file C) pfile D) online redo logs E) flashback logs F) data files Answer:AF

33.Where Is backup metadata stored for use by Recovery Manager (RMAN)? A) In the control file B) In the SYSAUX tablespace C) in the SPFILE D) in the SYSTEM tablespace E) In the diagnostic destination flies Answer:A