单选题Which declaration prevents creating a subclass of an outer class？（）AStatic class FooBar{}BPrivate class FooBar{}CAbstract public class FooBar{}DFinal public class FooBar{}EFinal abstract class FooBar{}

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第3题：

Which declaration prevents creating a subclass of an outer class？（）

• A、 Static class FooBar{}
• B、 Private class FooBar{}
• C、 Abstract public class FooBar{}
• D、 Final public class FooBar{}
• E、 Final abstract class FooBar{}

第4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5题：

Which is a benefit of implementing RFC 2827？（）

• A、Prevents DoS from legimate， non-hostile end systems
• B、Prevents disruption of "special services"， such as Mobile IP
• C、Defeats DoS Attacks which employ IPSource Address Spoofing
• D、Restricts directed broadcasts at the ingress router
• E、Allows DHCP or BOOTP packets to reach the relay agents asappropriate

第6题：

Which statement is correct about HTTP trickling?（）

• A、It prevents the HTTP client or server from timing-out during an antivirus update
• B、It prevents the HTTP client or server from timing-out during antivirus scanning.
• C、It is an attack.
• D、It is used to bypass antivirus scanners.

第7题：

Which three statements are true?（）

• A、A final method in class X can be abstract if and only if X is abstract.
• B、A protected method in class X can be overridden by any subclass of X.
• C、A private static method can be called only within other static methods in class X.
• D、A non-static public final method in class X can be overridden in any subclass of X.
• E、A public static method in class X can be called by a subclass of X without explicitly referencing the class X.
• F、A method with the same signature as a private final method in class X can be implemented in a subclass of X.
• G、A protected method in class X can be overridden by a subclass of X only if the subclass is in the same package as X.

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第14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15题：

You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once. Which three are possible mechanisms for performing this initialization code？（）

• A、In the init method.
• B、In the jspInit method.
• C、In the constructor of the JSP’s Java code.
• D、In a JSP declaration， which includes an initializer block.
• E、In a JSP declaration， which includes a static initializer block.

第16题：

Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP?（） (Choose three.)

• A、data integrity
• B、data confidentiality
• C、data authentication
• D、outer IP header confidentiality
• E、outer IP header authentication

第17题：

Which of the following statements about declaration are true？（）         

• A、 Declaration of primitive types such as boolean， byte and so on does not allocate memory space for the variable.
• B、 Declaration of primitive types such as boolean， byte and so on allocates memory space for the variable.
• C、 Declaration of nonprimitive types such as String， Vector and so on does not allocate memory space for the object.
• D、 Declaration of nonprimitive types such as String， Vector ans so on allocates memory space for the object.

第18题：

Which three security concerns can be addressed by a tunnel mode IPsec VPN secured by ESP？（）

• A、data integrity
• B、data confidentiality
• C、data authentication
• D、outer IP header confidentiality
• E、outer IP header authentication

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