tip:<为< 单选题 1．页面上的div标签,其HTML结构如下: <div id="father"> <p class="son" id="son">传智播客</p> </div> 对应的CSS样式代码如下: #father #son{ color:red; } #father p{ color:blue; } div .son{ color:yellow; } div p{ col…

1.给你四个坐标点,判断它们能不能组成一个矩形,如判断 ([0,0],[0,1],[1,1],[1,0]) 能组成一个矩形.勾股定理,矩形是对角线相等的四边形.只要任意三点不在一条直线上,任选一点,求这一点到另外三点的长度的平方,两个短的之和如果等于最长的,那么这就是矩形. 2.写一段代码判断单向链表中有没有形成环,如果形成环,请找出环的入口处,即 P 点 /* *单链表的结点类 */ class LNode{ //为了简化访问单链表,结点中的数据项的访问权限都设为public public i…

一.    填空题 使用文本编辑器编辑完HTML后,扩展名可以是__html___或___htm__. 表格的标签是____table______,单元格的标签是____td______. 在编辑table表格时,合并行使用 __rowspan_____合并列使用_____colspan____. 在CSS层叠样式表当中经常用到的三种选择器:___元素选择器___.__类选择器__.__id选择器__. 在JavaScript脚本语言当中,定义函数使用___function__单词表示. 用来输…

1.a=10,b=15,在不用第三方变量的前提下,吧a.b互换 2.已知数组int[] max={6,5,2,9,7,4,0};用快速排序算法按降序对其进行排列,并返回数组 3.请简述面向对象的多态的特性及意义! 面向对象的编程使用了派生继承以及虚函数机制. 一个本来指向基类的对象可以指向其派生类的,并访问从基类继承而来的成员变量和函数. 而虚函数是专门为这个特性设计的,这个函数在每个基类的派生类中都是同一个名字,但函数体却并不一定相同, 派生类往往为实现自己的功能而修改这个虚函数,这样用一个指…

4.For which requirement should you configure shared servers? A) accommodating an increasing number of users who run short-duration, infrequent queries in an OLTP environment with limited memory B) accommodating an increasing number of users who run a…

35.Your database is using Automatic Memory Management. Which two SGA components must be managed manually? A) default buffer cache B) redo log buffer C) large pool D) shared pool E) keep buffer pool Answer:BE…

26.In which state can you back up a database in ARCHIVELOGMODE using RMAN? A. NOMOUNT, MOUNT, AND OPEN B. NOMOUNT AND MOUNT ONLY C. OPEN ONLY D. MOUNT AND OPEN ONLY E. OPEN RESTRICTED ONLY Correct Answer: D…

25.Which is true about logical and physical database structures? (Choose the best answer) A. An undo tablespace has a temp file instead of a data file. B. A segment can consist of extents of different sizes. C. A permanent tablespace can only contain…

14.Which command is used to display files that no longer conform to the backup retention policy? A) REPORT OBSOLETE B) SHOW DATAFILE BACKUP COPIES C) CROSSCHECK BACKUP D) LIST EXPIRED BACKUP Answer:A…

10.Which two are true about consistent database backups? A) They can only be taken when a RECOVERY CATALOG is used. B) They can only be taken if the database Is in ARCHIVELOG mode. C) They can only be taken If shutdown NORMAL, TRANSACTIONAL, or IMMED…