题目内容

Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit？（）

A. Compilation will succeed for all classes and interfaces.
B. Compilation of class C will fail because of an error in line 2.
Compilation of class C will fail because of an error in line 6.
D. Compilation of class AImpl will fail because of an error in line 2.

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ClicktheExhibitbuttonandexaminethedatafromtheEMPtable. TheCOMMISSIONcolumnshowsthemonthlycommissionearnedbytheemployee. Whichthreetaskswouldrequiresubqueriesorjoinsinordertobeperformedinasinglestep?（）

A. deletingtherecordsofemployeeswhodonotearncommission
B. increasingthecommissionofemployee3bytheaveragecommissionearnedindepartment20
C. findingthenumberofemployeeswhodoNOTearncommissionandareworkingfordepartment20
D. insertingintothetableanewemployee10whoworksfordepartment20andearnsacommissionthatisequaltothecommissionearnedbyemployee3
E. creatingatablecalledCOMMISSIONthathasthesamestructureanddataasthecolumnsEMP_IDandCOMMISSIONoftheEMPtable
F. decreasingthecommissionby150fortheemployeeswhoareworkingindepartment30andearningacommissionofmorethan800

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蓄电池放电终了的特征是（）

A. 单格电压下降到终止电压1、75V
B. 不再有电
C. 电解液密度降到1、10g/cm
D. 蓄电池不能继续使用

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A user is running a long update batch file. Many tables are updated and all the statements are in one transaction. Before the process is finished， the user machine lost power. When the user calls you， what should you do as DBA？（）

A
B
C
D

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Your database is running in NOARCHIVELOG mode. Every night there is a backup taken using RMAN. During your startup this morning you received en error regarding DISK 3 on your server. This is the location of your data file for the SYSTEM tablespace. Which option is open to you？（）

A
B
C
D

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Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit？（）

A. Compilation will succeed for all classes and interfaces. B. Compilation of class C will fail because of an error in line 2. Compilation of class C will fail because of an error in line 6. D. Compilation of class AImpl will fail because of an error in line 2.

ClicktheExhibitbuttonandexaminethedatafromtheEMPtable. TheCOMMISSIONcolumnshowsthemonthlycommissionearnedbytheemployee. Whichthreetaskswouldrequiresubqueriesorjoinsinordertobeperformedinasinglestep?（）

蓄电池放电终了的特征是（）

A user is running a long update batch file. Many tables are updated and all the statements are in one transaction. Before the process is finished， the user machine lost power. When the user calls you， what should you do as DBA？（）

Your database is running in NOARCHIVELOG mode. Every night there is a backup taken using RMAN. During your startup this morning you received en error regarding DISK 3 on your server. This is the location of your data file for the SYSTEM tablespace. Which option is open to you？（）

A. Compilation will succeed for all classes and interfaces.
B. Compilation of class C will fail because of an error in line 2.
Compilation of class C will fail because of an error in line 6.
D. Compilation of class AImpl will fail because of an error in line 2.