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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.
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更多 “ 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.” 相关考题
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多选题Which three are true about servlet filters？（）AA filter must implement the destroy method.BA filter must implement the doFilter method.CA servlet may have multiple filters associated with it.DA servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.EA filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.
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多选题You want to create a filter for your web application and your filter will implement javax.servlet.Filter. Which two statements are true？（）AYour filter class must implement an init method and a destroy method.BYour filter class must also implement javax.servlet.FilterChain.CWhen your filter chains to the next filter， it should pass the same arguments it received in its doFiltermethod.DThe method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet.EYour filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.
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单选题Which is true about the web container request processing model？（）A
The init method on a filter is called the first time a servlet mapped to that filter is invoked.B
A filter defined for a servlet must always forward control to the next resource in the filter chain.C
Filters associated with a named servlet are applied in the order they appear in the web application deployment descriptor file.D
If the init method on a filter throws an UnavailableException， then the container will make no further attempt to execute it.
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多选题You want to create a valid directory structure for your Java EE web application， and your application usestag files and a JAR file. Which three must be located directly in your WEB-INF directory（NOT in asubdirectory of WEB-INF）？（）AThe JAR fileBA directory called libCA directory called tagsDA directory called TLDsEA directory called classesFA directory called META-INF
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多选题Which the three are true about servlet filters？（）AA filter must implement the destroy methodBA filter must implement the doFilter methodCA servlet may have multiple filters associated with itDA servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interfaceEA filter that is part of a filter chain passes control to the next filter in the chain by invoking the filterChain forward methodFFor each element in the web application deployment descriptor， multiple instances of a filter may be created by the web container
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单选题You are developing a custom-collection class.You need to create a method in your class. You need to ensure that the method you create in your class returns a type that is compatible with the Foreach statement. Which criterion should the method meet？（）A
The method must return a type of either IEnumerator or IEnumerable.B
The method must return a type of IComparable.C
The method must explicitly contain a collection.D
The method must be the only iterator in the class.
考题
单选题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.
考题
单选题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.
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