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下面哪个Servlet版本开始支持HTTP 2协议（）
A．Servlet 2.5
B．Servlet 3.0
C．Servlet 3.1
D．Servlet 4.0
参考答案和解析
Servlet 4.0
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Whichinterfacemustaclassimplementtobeinformedofasessioncreationevent?()
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Which two classes or interfaces provide a getSession method？（）A、 javax.servlet.http.HttpServletRequestB、 javax.servlet.http.HttpSessionContextC、 javax.servlet.http.HttpsServletResponseD、 javax.servlet.http.HttpSessionBindingEventE、 javax.servlet.http.HttpSessionAttributeEvent
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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
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考题
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