填空题What is the name of the method that threads can use to pause their execution until signalled to continue by another thread？ （） Fill in the name of the method （do not include a parameter list）.

第1题：

public class Threads2 implements Runnable {  public void nun（） {  System.out.println（”run.”）；  throw new RuntimeException（”Problem”）；  }  public static void main（String[] args） {  Thread t = new Thread（new Threads2（））；  t.start（）；  System.out.println（”End of method.”）；  }  }  Which two can be results？（）

• A、 java.lang.RuntimeException： Problem
• B、 run.    java.lang.RuntimeException： Problem
• C、 End of method.    java.lang.RuntimeException： Problem
• D、 End of method.      run.      java.lang.RuntimeException： Problem
• E、 run.    java.lang.RuntimeException： Problem     End of method.

第2题：

Your web application requires the adding and deleting of many session attributes during a complex usecase. A bug report has come in that indicates that an important session attribute is being deleted too soonand a NullPointerException is being thrown several interactions after the fact. You have decided to create asession event listener that will log when attributes are being deleted so you can track down when theattribute is erroneously being deleted. Which listener class will accomplish this debugging goal？（）

• A、Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.
• B、Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName method on the event object.
• C、Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.
• D、Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object.

第3题：

Given that t1 is a reference to a live thread， which is true？（）

• A、The Thread.sleep（） method can take t1 as an argument.
• B、The Object.notify（） method can take t1 as an argument.
• C、The Thread.yield（） method can take t1 as an argument.
• D、The Thread.setPriority（） method can take t1 as an argument.
• E、The Object.notify（） method arbitrarily chooses which thread to notify.

第4题：

What can cause a thread to become non-runnable？（）

• A、 Exiting from a synchronized block.
• B、 Calling the wait method on an object.
• C、 Calling the notify method on an object.
• D、 Calling the notifyAll method on an object.

第5题：

Which two statements are true about using the isUserInRole method to implement security in a Java EEapplication？（）

• A、It can be invoked only from the doGet or doPost methods.
• B、It can be used independently of the getRemoteUser method.
• C、Can return "true" even when its argument is NOT defined as a valid role name in the deployment descriptor.
• D、Using the isUserInRole method overrides any declarative authentication related to the method in which it is invoked.

第6题：

You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application must redirect the original URL to a different ASPX page.  You need to ensure that the users cannot view the original URL after the page is executed. You also need to ensure that each page execution requires only one request from the client browser. What should you do？（）

• A、Use the Server.Transfer method to transfer execution to the correct ASPX page.
• B、Use the Response.Redirect method to transfer execution to the correct ASPX page.
• C、Use the HttpContext.Current.RewritePath method to transfer execution to the correct ASPX page.
• D、Add the Location： new URL value to the Response.Headers collection. Call the Response.End（） statement. Send the header to the client computer to transfer execution to the correct ASPX page.

第7题：

You need to include a disclaimer to all sent messages in your organization. Some of the users require message encryption.How do you make sure that disclaimer can be included in encrypted messages？（）

• A、Instruct the users to use IRM encryption method only
• B、Instruct the users to use S/MIME encryption method only
• C、Using command New-ExchangeCertificate cmdlet
• D、Using the Set-ExchangeServer cmdlet

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第13题：

Which two CANNOT directly cause a thread to stop executing？（）

• A、 Calling the yield method.
• B、 Calling the wait method on an object.
• C、 Calling the notify method on an object.
• D、 Calling the notifyAll method on an object.
• E、 Calling the start method on another Thread object.

第14题：

Given this method in a class：  public String toString（） {  StringBuffer buffer = new StringBuffer（）；  buffer.append（‟<‟）；  buffer.append（this.name）；  buffer.append（‟>‟）；  return buffer.toString（）；  }  Which is true？（） 

• A、 This code is NOT thread-safe.
• B、 The programmer can replace StringBuffer with StringBuilder with no other changes.
• C、 This code will perform well and converting the code to use StringBuilder will not enhance the performance.
• D、 This code will perform poorly. For better performance， the code should be rewritten： return “<“+ this.name + “>”；

第15题：

public class Person {  private name；  public Person（String name） {  this.name = name；  }  public boolean equals（Object o） {  if（ !o instanceof Person ） return false；  Person p = （Person） o；  return p.name.equals（this.name）；  }  }  Which is true？（） 

• A、 Compilation fails because the hashCode method is not overridden.
• B、 A HashSet could contain multiple Person objects with the same name.
• C、 All Person objects will have the same hash code because the hashCode method is not overridden.
• D、 If a HashSet contains more than one Person object with name=”Fred”， then removing another person， also with name=”Fred”， will remove them all.

第16题：

Which statement is true？（）   

• A、 If only one thread is blocked in the wait method of an object， and another thread executes the modify on that same object， then the first thread immediately resumes execution.
• B、 If a thread is blocked in the wait method of an object， and another thread executes the notify method on the same object， it is still possible that the first thread might never resume execution.
• C、 If a thread is blocked in the wait method of an object， and another thread executes the notify method on the same object， then the first thread definitely resumes execution as a direct and sole consequence of the notify call.
• D、 If two threads are blocked in the wait method of one object， and another thread executes the notify method on the same object， then the first thread that executed the wait call first definitely resumes execution as a direct and sole consequence of the notify call.

第17题：

Your application uses two threads， named threadOne and threadTwo. You need to modify the code to prevent the execution of threadOne until threadTwo completes execution. What should you do？（）

• A、 Configure threadOne to run at a lower priority.
• B、 Configure threadTwo to run at a higher priority.
• C、 Use a WaitCallback delegate to synchronize the threads.
• D、 Call the Sleep method of threadOne. 
• E、 Call the SpinLock method of threadOne.

第18题：

You use Microsoft .NET Framework 4 to create an application. The application performs resource-intensive calculations that consist of multiple layers of nested looping. The application will be deployed to servers that contain varying hardware configurations. You need to ensure that the application utilizes CPU resources on the server in the most efficient manner. You want to achieve this goal by using the minimum amount of code. What should you do?（）

• A、 Use multiple System.Threading.Thread objects.
• B、 Use the background worker process (BWP).
• C、 Use the Thread.BeginInvoke method.
• D、 Use the Parallel.For method.

第19题：

You need to implement an authentication method on SQL4. The TravelOnline database will be accessed through a Web services application. You need to make the authentication method as secure as possible.What should you do？（）

• A、Create an HTTP endpoint with NTLM authentication， and create a service principal name （SPN）.
• B、Create an HTTP endpoint with digest authentication， and create a service principal name （SPN）.
• C、Create an HTTP endpoint with integrated authentication， and create a service principal name （SPN）.
• D、Create an HTTP endpoint with Kerberos authentication.

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