C #考试中英对照版
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2009-03-30
18:10:00
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1. You are working on a debug build of an application.
您正在调试一个应用程序
You need to find the line of code that caused an exception to be thrown.
您要找到导致异常被抛出的那行代码
Which property of the Exception class should you use to achieve this goal?
下面异常类的哪一个属性可以用来实现这一目的。
A. Data
B. Message
C. StackTrace
D. Source
Answer: C
2. You are writing a method that returns an ArrayList named al.
您正在编写一个返回 ArrayList 类型值 a1 的方法。
You need to ensure that changes to the ArrayList are performed in a thread-safe manner.
您需要确保 ArrayList 的改变在一个线程安全的方式下进行。
Which code segment should you use?
您可以使用下面哪一段代码
A. ArrayList al = new ArrayList();
lock (al.SyncRoot)
{
return al;
}
B. ArrayList al = new ArrayList();
lock (al.SyncRoot.GetType())
{
return al;
}
C. ArrayList al = new ArrayList();
Monitor.Enter(al);
Monitor.Exit(al);
return al;
D. ArrayList al = new ArrayList();
ArrayList sync_al = ArrayList.Synchronized(al);
return sync_al;
Answer: D
3. You need to create a method to clear a Queue named q.
您需要创建一个用于清除名称为 q 的队列
Which code segment should you use?
下面的那一段代码您可以使用？
A. foreach (object e in q) {
q.Dequeue(); }
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