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【多选题】
条形码是由一组规则排列的( )组成的。A.
条
B.
空
C.
字符
D.
花纹
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反馈参考答案：
举一反三
【简答题】管导与翼导
【简答题】什么是管导、什么是翼导?各有何特点?
【单选题】Windows Communication Foundation （WCF） application uses a data contract that has several data members. You need the application to throw a Serialization Exception if any of the data members are not pr...
A.
Add the Known Type attribute to the data contract.Set a default value in each of the data member declarations.
B.
Add the Known Type attribute to the data contract.Set the Order property of each data member to unique integer value.
C.
Set the Emit Default Value property of each data member to false.
D.
Set the Is Required property of each data member to true.
【单选题】The variable df is an object of type DateFormat that has been initialized in line 11. What is the result if this code is run on December 14， 2000？（）
A.
The value of s is 14-dic-2000.
B.
The value of s is Dec 14， 2000.
C.
An exception is thrown at runtime.
D.
Compilation fails because of an error in line 13.
【单选题】What exception type does the following program throw? public class Test { public static void main(String[] args) { Object o = new Object(); String d = (String)o; } }
A.
ArithmeticException
B.
No exception
C.
StringIndexOutOfBoundsException
D.
ClassCastException
【简答题】管导/翼导
【单选题】What is true about constructor?
A.
It can contain return type
B.
It can take any number of parameters
C.
It can have any non access modifiers
D.
Constructor cannot throw an exception
【单选题】What exception type does the following program throw? public class Test { public static void main(String[] args) { Object o = null; System.out.println(o.toString()); } }
A.
ArrayIndexOutOfBoundsException
B.
ClassCastException
C.
NullPointerException
D.
ArithmeticException
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