单选题Which interface must a class implement to be informed of a session creation event？（）A  javax.servlet.http.HttpSessionListenerB  javax.servlet.http.HttpSessionBindingListenerC  javax.servlet.http.HttpSessionCreationListenerD  javax.servlet.http.HttpSess

第1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2题：

In your web application，you need to execute a block of code whenever the session object is first created. Which design will accomplish this goal？（）

• A、Create an HttpSessionListener class and implement the sessionInitialized method with that block ofcode.
• B、Create an HttpSessionActivationListener class and implement the sessionCreated method with thatblock of code.
• C、Create a Filter class， call the getSession（false） method， and if the result was null， then execute that block of code.
• D、Create an HttpSessionListener class and implement the sessionCreated method with that block of code.

第3题：

第4题：

Which statements about inheritance are true？（）         

• A、 In Java programming language only allows single inheritance.
• B、 In Java programming language allows a class to implement only one interface.
• C、 In Java programming language a class cannot extend a class and implement a interface together.
• D、 In Java programming language single inheritance makes code more reliable.

第5题：

A system is being designed with many LPARs which will be clients of dual VIO Servers. The VIO Servers must be redundant so that, in the event of scheduled maintenance, the clients do not need to be shut down.  Which of these strategies could be used to ensure that the client LPARs continue to be able to use the network in the event of a VIO Server being shut down?（）

• A、Implement PowerHA SystemMirror on both VIO servers.
• B、Configure Etherchannel between the client LPARs and the two VIO servers
• C、Configure Network Interface Backup between the two VIO servers and use each VIO server to access the network.
• D、Implement Shared Ethernet Adapter failover and have all client partitions access the network through the shared adapters.

第6题：

Which interface must a class implement to be informed of a session creation event？（）

• A、 javax.servlet.http.HttpSessionListener
• B、 javax.servlet.http.HttpSessionBindingListener
• C、 javax.servlet.http.HttpSessionCreationListener
• D、 javax.servlet.http.HttpSessionActivationListener

第7题：

Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality  of voice calls？（）

• A、Increase the queue size of the voice class.
• B、Guarantee bandwidth during congestion to the voice class with a bandwidth command.
• C、Increase the tx-ring of the egress interface.
• D、Implement LLQ for the voice class.
• E、Decrease the rx-ring of the egress interface.
• F、Decrease the queue size of the voice class.

第8题：

A custom JSP tag must be able to support an arbitrary number of attributes whose names are unknown when the tag class is designed.  Which two are true？ （）

• A、 A  element in the echo tag LTD must have the value JSP
• B、 The echo tag handler must define the setAttribute （String key， String value） method
• C、 The true element must appear in the echo tag TLD
• D、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.IterationTag interface
• E、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.DynamicAttributes interface

第9题：

Which interface must a session attribute implement if it needs to be notified when a web container persistsa session？（）

• A、javax.servlet.http.HttpSessionListener
• B、javax.servlet.http.HttpSessionBindingListener
• C、javax.servlet.http.HttpSessionAttributeListener
• D、javax.servlet.http.HttpSessionActivationListener

第10题：

Given a class whose instances， when found in a collection of objects， are sorted by using the compareTo（） method， which two statements are true？（）

• A、The class implements java.lang.Comparable.
• B、The class implements java.util.Comparator.
• C、The interface used to implement sorting allows this class to define only one sort sequence.
• D、The interface used to implement sorting allows this class to define many different sort sequences.