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View the Exhibit to examine the error while executing the REPAIR FAILURE command in an RMAN session.What is the reason for this error?()A. Another repair session is running concurrently.B. The failure ID has not been mentioned in the command for data file

题目
View the Exhibit to examine the error while executing the REPAIR FAILURE command in an RMAN session.What is the reason for this error?()

A. Another repair session is running concurrently.

B. The failure ID has not been mentioned in the command for data file 5.

C. There are new failures recorded in the Automatic Diagnostic Repository (ADR).

D. The ADVISE FAILURE command has not been issued before the REPAIR FAILURE command.


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  • 第1题:

    AD0对象模型包括5个对象,分别是Connection、Command、Field、Error和( )。

    A.Database

    B.Workspace

    C.RecordSet

    D.DBEngine


    正确答案:C
    Recordset对象用来操作来自提供者的数据。使用AD0时,通过Recordset对象可对几乎所有数据进行操作。所有Recordset对象均使用记录(行)和字段(列)进行构造。

  • 第2题:

    下列代码的执行结果是( )。

    A.error1

    B.error2

    C.error1 error2

    D.2 error2


    正确答案:C
    当0作为除数时,会产生异常,而Arith-meticException和Exception两类异常都内部被捕捉到。

  • 第3题:

    如果A为整数,且|A|>=100,则打印"OK",否则打印"Error",表示这个条件的单行 格式If语句是( )。

    A.If int(A)=AAnd Sqr(A)>=10ThenPrint"OK"ElsePrint"Error"

    B.IF Fix(A)=AAndAbs(A)>=100Then Print"OK"Else Print"Error"

    C.IF Int(A)=AAnd(A>=100,A<=-100)ThenPrint"OK"ElsePrim"Error"

    D.If Fix(A)=AAndA>=100,AndA<=-100ThenPrint"OK"ElsePrint"Error"


    正确答案:B

  • 第4题:

    下列程序的运行结果是( )。 A.error1:10.5B.error2C.error1:10.5 error2S

    下列程序的运行结果是( )。

    A.error1:10.5

    B.error2

    C.error1:10.5 error2

    D.以上都不对


    正确答案:C
    try-catoh块是可以嵌套分层的,并且通过异常对象的数据类型进行匹配,以找到正确的catchblock异常错误处理代码。以下是通过异常对象的数据类型进行匹配找到正确的catchblock的过程。①首先在抛出异常的try-catch块中查找catchblock,按顺序先与第-个catchblock块匹配,如果抛出的异常对象的数据类型与catchblockee传入的异常对象的临时变量(就是catch语句后面参数)的数据类型完全相同,或是它的子类型对象,则匹配成功,进入catchblock中执行,否则到第②步;②如果有两个或更多的catchblock,则继续查找匹配第二个、第三个,乃至最后-个catchblock,如匹配成功,则进入对应的catchblock中执行,否则到第③步;③返回到上-级的try-catch块中,按规则继续查找对应的catchblock。如果找到,进入对应的catchblock中执行,否则到第4步;④再到上上级的try-catch块中,如此不断递归,直到匹配到顶级的try-catch块中的最后-个catchblock,如果找到,进入到对应的catchblock中执行;否则程序将会执行terminate()退出。所以选C。

  • 第5题:

    ADO对象模型主要有Connection、Command、( )、Field和Error5个对象。

    A.Database

    B.Workspace

    C.RecordSet

    D.DBEngine


    正确答案:C

  • 第6题:

    What does ECC stand for?()

    A. Error-Checking Code

    B. Extended-Checking Code

    C. Error-Correction Code

    D. Enhanced-Correction Code


    参考答案:C