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Examine the output of the query that you executed to list the objects in the recycle bin:You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin:SQL> PURGE TABLE sale

题目

Examine the output of the query that you executed to list the objects in the recycle bin:You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin:SQL> PURGE TABLE sales_tab;What would be the outcome of this command?()

A. All three tables in the recycle bin are purged

B. Only the table with the oldest DROPSCN is purged

C. The command returns an error because multiple entries with the same name exist in the recycle bin

D. Only the table with the latest DROPSCN is purged


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  • 第1题:

    执行x$=InputBox("请输入x的值")时,在弹出的对话框中输入123,在列表框List1中选中一个列表项(数据为456),使结果为123456 的语句是( )。

    A.y=x$+List1.List(0)

    B.y=x$+List1.List(1)

    C.y=Val(x$)+Val(List1.List(0))

    D.y=Val(x$)&Val(List1.List(1))


    正确答案:A
    A。【解析】InputBox函数返回的值为字符串类型,要得到l23456,只需要将两个字符串相加,因此可用y=x$+Listl.List(0)得到。

  • 第2题:

    设计一个能将四位二进制数转换成两个BCD码的电路,模块名为_4bits2bcd,输入端口为Bin,输出端口为BCD1,BCD0,下面选项代码编写正确的是()。

    A.module _4bits2bcd(Bin,BCD1,BCD0); input Bin; output BCD1,BCD2; ... ...

    B.module _4bits2bcd(Bin,BCD1,BCD0); input [3:0] Bin; output BCD1,BCD2; ... ...

    C.module _4bits2bcd(Bin,BCD1,BCD0); input Bin; output [3:0] BCD1,BCD2; ... ...

    D.module _4bits2bcd(Bin,BCD1,BCD0); input[3:0] Bin; output[3:0] BCD1,BCD2; ... ...


    正确

  • 第3题:

    3、绿色设计的“3R”核心理念是:

    A.Romantic、Recycle、Reuse

    B.Red、Recycle、Reuse

    C.Reduce、Recycle、Reuse

    D.Research、Recycle、Reuse


    Reduce

  • 第4题:

    执行x$=InputBox("请输入x的值")时,在弹出的对话框中输入123,在列表框List1选中1个列表项(数据为456),使y的值是123456的语句是( )。

    A.y=x$+List1.List(O)

    B.y=x$+List1.List(1)

    C.y=Val(x$)+Val(List1.List(0))

    D.y=Val(x$)&Val(List1.List(1))


    正确答案:A

  • 第5题:

    以下对于列表的相关操作中哪些项有正确的输出结果?

    A.>>> language = list('PHP'); >>> language[1:] = 'ython'; >>> print(language) ['P', 'y', 't', 'h', 'o', 'n']#B.>>> print(list('Life is short, you need Python.').count('is')) 1#C.>>> x = [2, 3, 0, 4, 1] >>> x.sort() >>> print(x) [0, 1, 2, 3, 4]#D.>>> words = ['Life', 'is', 'short', 'you', 'need', 'Python'] >>> words.index('you') 4
    >>> language = list('PHP'); >>> language[1:] = 'ython'; >>> print language ['P', 'y', 't', 'h', 'o', 'n'];>>> x = [2, 3, 0, 4, 1]>>> x.sort()>>> print x[0, 1, 2, 3, 4]

  • 第6题:

    排查问题需要,想查看所有MySQL Server的SQL语句,可以如何操作?

    A.配置slow_query_log=1并设置log_query_time=0

    B.配置general_log=1

    C.配置log_output=1

    D.配置log_bin=1


    AB