Which interface must a class implement so that instances of the class are notified after any object is added to a session？ （）A、 javax.servlet.http.HttpSessionListenerB、 javax.servlet.http.HttpSessionValueListenerC、 javax.servlet.http.HttpSessionBindingListenerD、 javax.servlet.http.HttpSessionAttributeListener
Which interface must a class implement so that instances of the class are notified after any object is added to a session？ （）
- A、 javax.servlet.http.HttpSessionListener
- B、 javax.servlet.http.HttpSessionValueListener
- C、 javax.servlet.http.HttpSessionBindingListener
- D、 javax.servlet.http.HttpSessionAttributeListener
相关考题：
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.
Given:Which statement is true about the class of an object that can reference the variable base? () A.It can be any class.B.No class has access to base.C.The class must belong to the geometry package.D.The class must be a subclass of the class Hypotenuse.
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 JSPB、 The echo tag handler must define the setAttribute （String key， String value） methodC、 The true element must appear in the echo tag TLDD、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.IterationTag interfaceE、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.DynamicAttributes interface
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.
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.HttpSessionActivationListener
Which interface must a class implement so that instances of the class are notified after any object is addedto a session？（）A、javax.servlet.http.HttpSessionListenerB、javax.servlet.http.HttpSessionValueListenerC、javax.servlet.http.HttpSessionBindingListenerD、javax.servlet.http.HttpSessionAttributeListener
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.
Which statements concerning the methods notify（） and notifyAll（） are true？ A、Instances of class Thread have a method called notify（）.B、A call to the method notify（） will wake the thread that currently owns the monitor of the object.C、The method notify（） is synchronized.D、The method notifyAll（） is defined in class Thread.E、When there is more than one thread waiting to obtain the monitor of an object， there is no way to be sure which thread will be notified by the notify（） method.
下列代码正确的是哪项？（） A、 public class Session implements Runnable， Clonable{ public void run （）；public Object clone （） ； }B、 public class Session extends Runnable， Cloneable { public void run（） {/*dosomething*/} public Object clone（） {/*make a copy*/} }C、 public abstract class Session implements Runnable， Clonable { public void run（） {/*do something*/} public Object clone（） {/*make a copy*/} }D、 public class Session implements Runnable， implements Clonable { public void run（） {/*do something*/} public Object clone（） {/*make a copy*/} }
Which interface must a session attribute implement if it needs to be notified when a web container persistsa session？（）A、javax.servlet.http.HttpSessionListenerB、javax.servlet.http.HttpSessionBindingListenerC、javax.servlet.http.HttpSessionAttributeListenerD、javax.servlet.http.HttpSessionActivationListener
package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）A、 It can be any class.B、 No class has access to base.C、 The class must belong to the geometry package.D、 The class must be a subclass of the class Hypotenuse.
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.
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.
A developer wants too use EL to invoke a function using S{my：bloof（“foof”）}. Which is always true？（）A、 The method invoked by this function must be statie.B、 The function class must implement the Function interface.C、 The expression is NOT a valid EL expression for invoking a function.D、 The function must be declared in a web.xml file using the element.E、 The function class must have a method with the signature：Void bloof （java.lang.Strings）
You want to create a filter for your web application and your filter will implement javax.servlet.Filter. Which two statements are true？（）A、Your filter class must implement an init method and a destroy method.B、Your filter class must also implement javax.servlet.FilterChain.C、When your filter chains to the next filter， it should pass the same arguments it received in its doFiltermethod.D、The method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet.E、Your filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.
Which class provides paging functionality for data-bound controls that implement the IPageableItemContainer interface？（）A、DataPagingFieldB、DataPagerCollectionC、DataPagerD、DataPaging
You are developing a data contract for a Windows Communication Foundation (WCF) service. The data in the data contract must participate in round trips. Strict schema validity is not required. You need to ensure that the contract is forward-compatible and allows new data members to be added to it. Which interface should you implement in the data contract class?（）A、ICommunicationObjectB、IExtensionC、IExtensibleObjectD、IExtensibleDataObject
You are developing a Windows Communication Foundation (WCF) service that contains the following service contract.[ServiceContract（ ）]public interface IPaymentService{ [OperationContract（ ）] void RecordPayments(Person person);}public class Person{ ... }public class Employee : Person{ ... }public class Customer : Person{ ... }You need to ensure that RecordPayments can correctly deserialize into an Employee or a Customer object. What should you do?（）A、Add the following KnownType attribute to the Employee class and to the Customer class. [KnownType(GetType(Person))]B、Implement the IExtensibleDataObject interface in the Person class.C、Implement the IExtension(ofType(T)) interface in the Person class.D、Add the following KnownType attributes to the Person class. [KnownType(GetType(Employee))] [KnownType(GetType(Customer))]
单选题package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）A It can be any class.B No class has access to base.C The class must belong to the geometry package.D The class must be a subclass of the class Hypotenuse.
单选题A developer wants too use EL to invoke a function using S{my：bloof（“foof”）}. Which is always true？（）A The method invoked by this function must be statie.B The function class must implement the Function interface.C The expression is NOT a valid EL expression for invoking a function.D The function must be declared in a web.xml file using the element.E The function class must have a method with the signature：Void bloof （java.lang.Strings）
单选题You want to provide a tool that allows users quick access to form modules, by listing them in an Explorer-style interface. Which reusable component do you use?（）AActiveX controls BCalendar Class CStandard Object Library DPicklist Class EWizard Class FNavigator Class
单选题Which interface must a class implement so that instances of the class are notified after any object is added to a session？ （）A javax.servlet.http.HttpSessionListenerB javax.servlet.http.HttpSessionValueListenerC javax.servlet.http.HttpSessionBindingListenerD javax.servlet.http.HttpSessionAttributeListener
多选题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？ （）AA element in the echo tag LTD must have the value JSPBThe echo tag handler must define the setAttribute （String key， String value） methodCThe true element must appear in the echo tag TLDDThe class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.IterationTag interfaceEThe class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.DynamicAttributes interface
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.HttpSessionActivationListener
多选题Which statements about inheritance are true？（）AIn Java programming language only allows single inheritance.BIn Java programming language allows a class to implement only one interface.CIn Java programming language a class cannot extend a class and implement a interface together.DIn Java programming language single inheritance makes code more reliable.
单选题Which interface must a session attribute implement if it needs to be notified when a web container persistsa session？（）Ajavax.servlet.http.HttpSessionListenerBjavax.servlet.http.HttpSessionBindingListenerCjavax.servlet.http.HttpSessionAttributeListenerDjavax.servlet.http.HttpSessionActivationListener
单选题Which interface must a class implement so that instances of the class are notified after any object is addedto a session？（）Ajavax.servlet.http.HttpSessionListenerBjavax.servlet.http.HttpSessionValueListenerCjavax.servlet.http.HttpSessionBindingListenerDjavax.servlet.http.HttpSessionAttributeListener