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【单选题】
You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. Now according to the company requirement, you are designing a consolidated repository of performance data. You must make sure that the four requirements below are met: the data collector is used to gather performance information; a single database stores performance information for all instances; performance information that is older than 15 days is deleted; reduce the administrative effort to manage performance to the least. So what action should you perform to achieve this goal? （）A.
You should create a SQL Agent job process on each instance to store and delete performance data in a single database for all instances.
B.
You should configure a management data warehouse process on each instance, then use this process to store and delete performance data in a single database for all instances.
C.
You should configure an automated server-side trace process on each instance, then use this process to store and delete performance data in a single database for all instances.
D.
You should create and schedule a single Microsoft SQL Service Integration Services (SSIS) package process, then use this process to store and delete performance data in a single database for all instances.
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【单选题】设程序中若有如下说明和定义语句 #include char fun(char *) ; int main( ) { char *s = "one" , a[5] = { 0},( *f1 )(char *) = fun , ch ; ... } 以下选项中对函数fun的正确调用语句是_______。
A.
( *f1 )( a ) ;
B.
*f1( *s ) ;
C.
fun( &a ) ;
D.
ch = *f1( s ) ;
【简答题】经济周期有( )周期、( )周期和( )周期之分。
【单选题】设有函数说明“int* fun(int *p,int n);”,则函数体中的返回语句应为 。
A.
return n;
B.
return &n;
C.
return *p;
D.
return &p;
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