第12题: [单项选择]运行OUI前必须在Linux中设置哪个环境变量(选择一个最佳答案)? A. ORACLE_HOME B. ORACLE_BASE C. ORACLE_SID D. DISPLAY 参考答案:D 答案解析:如果不设置DISPLAY,OUI将无法打开任何窗口。A、B和C是错误的,因为虽然可以在启动OUI前设置它们,但OUI将提示用户为它们输入值。
第20题: [单项选择]The group of boys had to stop because ______. A. they had reached the peak B. one of the boys was badly injured C. one of the boys was sick D. they had to return to the hut 参考答案:C 答案解析:此考题为细节题。根据文章第2句At this point the party had to stop climbing be cause one of the boys became seriousl
第35题: [单项选择]下列程序段执行时在屏幕上显示的结果是( )。
x1=20
x2=30
SET UDFPARMS TO VALUE
DO test WITH x1,x2
x1,x2
PROCEDURE test
PARAMETERS a.b
x=a
a=b
b=x
ENDPRO A. 30 30 B. 30 20 C. 20 20 D. 20 30 参考答案:B 答案解析:[解析] 根据过程test的代码可以分析出:test的功能是将传递的两个参数互换。变量x1、x2的初始值是20、30,经过“DO test WITH x1、x2”的调用后,x1、x2的值互换,值分别是