有如下程序: Private Sub Commandl_Click() Dim a As Single Dim b As Single a=2:b=4 Call CS(a,b)End Sub Sub CS(x As Single,y As Single) t=X x=t\y y=t Mod y End Sub 程序运行后,单击命令按钮,a和b的值分别为
A.0 0
B.1 1
C.0 2
D.1 2
第1题:
VB中数据类型Single表示单精度型,占( )字节。
A.2
B.4
C.6
D.8
第2题:
You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel.You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines.var service = new WarehouseService(); var host = new ServiceHost(service);You need to ensure that new operations do not wait for previous operations to finish.Which attribute should you use to decorate the service?()
A. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Multiple)]
B. [CallbackBehavior(ConcurrencyMode=ConcurrencyMode.Multiple)]
C. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Single)]
D. [ServiceBehavior(InstanceContextMode=InstanceContextMode.Single, ConcurrencyMode=ConcurrencyMode.Reentrant)]
第3题:
【问题1】(2分)
为程序中空缺处(1)选择正确答案。
备选答案:
A. Open B. Run C. Execute D. Dim
第4题:
此题为判断题(对,错)。
第5题:
Single(单精度)型数据占( )个字节。
A.2
B.4
C.8
D.10
第6题:
You are developing a Windows Communication Foundation (WCF) service.One of the service operations contains the following code.private static int counter = 0;[OperationContract]public void IncrementCount(){ counter++;}You need to set a service behavior that prevents two or more threads from incrementing the counter variable at the same time.Which code segment should you use to set the service behavior?()
A. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Single)]
B. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Single)]
C. [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)]
D. [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Reentrant)]
第7题:
在标准模块中用:Dim或Private关键字定义的变量是______变量,它们只能在程序的模块中使用。
第8题:
( 22 )有如下过程代码:
Sub var_dim()
Static numa As Integer
Dim numb As Integer
numa=numa+2
numb=numb+1
print numa;numb
End Sub
连续 3 次调用 var_dim 过程,第 3 次调用时的输出是
A ) 2 1
B ) 2 3
C ) 6 1
D ) 6 3
第9题:
有如下过程代码: Sub var_dim( ) static numa As Integer Dim numb As Integer numa=numa+2. numb=numb+1 print numa;mub End Sub 连续3次调剧var_dim过程,第3次调用时的输出是( )。
A.2 1
B.2 3
C.6 1
D.6 3
第10题:
A.全速率—Couple半速率—Single半速率
B.全速率—Single半速率—Couple半速率
C.Couple半速率—Single半速率—全速率
D.Couple半速率—全速率—Single半速率
E.Single半速率—全速率—Couple半速率