Which statements concerning the event model of the AWT are true？（）  A、At most one listener of each type can be registered with a component.B、Mouse motion listeners can be registered on a List instance.C、There exists a class named ContainerEvent in package

第1题：

Which statements concerning the switch construct are true？（）  

• A、All switch statements must have a default label.
• B、There must be exactly one label for each code segment in a switch statement.
• C、The keyword continue can never occur within the body of a switch statement.
• D、No case label may follow a default label within a single switch statement.
• E、A character literal can be used as a value for a case label.

第2题：

Which two statements are true？（）

• A、 An inner class may be declared as static.
• B、 An anonymous inner class can be declared as public.
• C、 An anonymous inner class can be declared as private.
• D、 An anonymous inner class can extend an abstract class.
• E、 An anonymous inner class can be declared as protected.

第3题：

第4题：

For which three events can web application event listeners be registered？（）

• A、When a session is created
• B、After a servlet is destroyed
• C、When a session has timed out
• D、When a cookie has been created
• E、When a servlet has forwarded a request
• F、When a session attribute value is changed

第5题：

以下（）有关事件监听器的语句是正确的。

• A、Multiple listeners can be attached to one component
• B、Only one listener can be attached to one component
• C、One listener can receive and process the events from multiple components
• D、One listener can receive and process the events from only one component

第6题：

Which statements concerning the correlation between the inner and outer instances of non-static inner classes are true？（）  

• A、Member variables of the outer instance are always accessible to inner instances， regardless of their      accessibility modifiers.
• B、Member variables of the outer instance can never be referred to using only the variable name within     the inner instance.
• C、More than one inner instance can be associated with the same outer instance.
• D、All variables from the outer instance that should be accessible in the inner instance must be declared     final.
• E、A class that is declared final cannot have any inner classes.

第7题：

package foo；  public class Outer {  public static class Inner {  }  }   Which statement is true？（） 

• A、 Compilation fails.
• B、 An instance of the Inner class can be constructed with “new Outer.Inner（）”.
• C、 An instance of the Inner class cannot be constructed outside of package foo.
• D、 An instance of the Inner class can be constructed only from within the Outer class.
• E、 From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.

第8题：

第9题：

package foo； public class Outer （  public static class Inner （  ）  ）   Which statement is true？ （） 

• A、 An instance of the Inner class can be constructed with “new Outer.Inner （）”
• B、 An instance of the inner class cannot be constructed outside of package foo.
• C、 An instance of the inner class can only be constructed from within the outer class.
• D、 From within the package bar， an instance of the inner class can be constructed with “new inner（）”

第10题：

Which  statements are true regarding listeners（）

• A、Listeners use only the TCP/IP protocol.
• B、Multiple listener processes can run simultaneously on a host.
• C、Multiple database instances can be registered with a single listener.
• D、The listener-related errors can be traced only at the administrative level.
• E、Only one database instance can be registered with a single listener at any time