单选题Given a Filter class definition with this method： 21.public void doFilter（ServletRequest request， 22.ServletResponse response， 23.FilterChain chain） 24.throws ServletException， IOException { 25.// insert code here26. } Which should you insert at line 2

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单选题

Given a Filter class definition with this method： 21.public void doFilter（ServletRequest request， 22.ServletResponse response， 23.FilterChain chain） 24.throws ServletException， IOException { 25.// insert code here26. } Which should you insert at line 25 to properly invoke the next filter in the chain，or the target servlet if thereare no more filters？（）

chain.forward（request， response）；

chain.doFilter（request， response）；

request.forward（request， response）；

request.doFilter（request， response）；

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相似问题和答案

第1题：

Which two statements are true about the hashCode method？（）

A、 The hashCode method for a given class can be used to test for object equality and object inequality for that class.
B、 The hashCode method is used by the java.util.SortedSet collection class to order theelements within that set.
C、 The hashCode method for a given class can be used to test for object inequality， but NOT object equality， for that class.
D、 The only important characteristic of the values returned by a hashCode method is that the distribution of values must follow a Gaussian distribution.
E、 The hashCode method is used by the java.util.HashSet collection class to group the elements within that set into hash buckets for swift retrieval.

正确答案:C,E

第2题：

Given the web application deployment descriptor elements： 11. 12.ParamAdder 13.com.example.ParamAdder 14.... 24. 25.ParamAdder 26.MyServlet 27. 28. Which element， inserted at line 27，causes the ParamAdder filter to be applied when MyServlet is invokedby another servlet using the RequestDispatcher.include method？（）

A、<include/>
B、<dispatcher>INCLUDE</dispatcher>
C、<dispatcher>include</dispatcher>
D、<filter-condition>INCLUDE</filter-condition>
E、<filter-condition>include</filter-condition>

正确答案:B

第3题：

public class Test{2.int x=12;3.public void method(intx){4.x＋=x;5.System.out.println(x);6.}7.}Given:34.Test t=new Test();35.t.method(5);What is the output from line 5 of the Test class?()

A.5

B.10

C.12

D.17

E.24

参考答案：B

第4题：

Given an ActionEvent， which method allows you to identify the affected Component？（）

A、 Public class getClass（）
B、 Public Object getSource（）
C、 Public Component getSource（）
D、 Public Component getTarget（）
E、 Public Component getComponent（）
F、 Public Component getTargetComponent（）

正确答案:B

第5题：

Which methods from the String and StringBuffer classes modify the object on which they are called？（）

A、The charAt（） method of the String class.
B、The toUpperCase（） method of the String class.
C、The replace（） method of the String class.
D、The reverse（） method of the StringBuffer class.
E、The length（） method of the StringBuffer class.

正确答案:D

第6题：

1. public class a { 2. public void method1（） { 3. try { 4. B b=new b（）； 5. b.method2（）； 6. // more code here 7. } catch （TestException te） { 8. throw new RuntimeException（te）； 9. } 10. } 11. } 1. public class b { 2. public void method2（） throws TestException { 3. // more code here 4. } 5. } 1. public class TestException extends Exception { 2. } Given： 31. public void method（） { 32. A a=new a（）； 33. a.method1（）； 34. } Which is true if a TestException is thrown on line 3 of class b？（）

A、 Line 33 must be called within a try block.
B、 The exception thrown by method1 in class a is not required to be caught.
C、 The method declared on line 31 must be declared to throw a RuntimeException.
D、 On line 5 of class a， the call to method2 of class b does not need to be placed in a try/catch block.

正确答案:B

第7题：

Given the following interface definition， which definitions are valid？（） interface I { void setValue（int val）； int getValue（）； } DEFINITION a：（a） class a extends I { int value； void setValue（int val） { value = val； } int getValue（） { return value； } } DEFINITION b：（b） interface b extends I { void increment（）； } DEFINITION c：（c） abstract class c implements I { int getValue（） { return 0； } abstract void increment（）； } DEFINITION d：（d） interface d implements I { void increment（）； } DEFINITION e：（e） class e implements I { int value； public void setValue（int val） { value = val； } }

A、Definition a.
B、Definition b.
C、Definition c.
D、Definition d.
E、Definition e.

正确答案:B,C

第8题：

Click the Exhibit button. Given:Which statement is true if a TestException is thrown on line 3 of class B? ()

A.Line 33 must be called within a try block.

B.The exception thrown by method1 in class A is not required to be caught.

C.The method declared on line 31 must be declared to throw a RuntimeException.

D.On line 5 of class A, the call to method2 of class B does not need to be placed in a try/catch block.

参考答案：B

第9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.

正确答案:A,C

第10题：

Which three are true about servlet filters？（）

A、A filter must implement the destroy method.
B、A filter must implement the doFilter method.
C、A servlet may have multiple filters associated with it.
D、A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
E、A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.

正确答案:A,B,C

Given a Filter class definition with this method： 21.public

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