Which method must be defined by a class implementing the jav

第1题：

A custom JSP tag must be able to support an arbitrary number of attributes whose names are unknown when the tag class is designed.  Which two are true？ （）

• A、 A  element in the echo tag LTD must have the value JSP
• B、 The echo tag handler must define the setAttribute （String key， String value） method
• C、 The true element must appear in the echo tag TLD
• D、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.IterationTag interface
• E、 The class implementing the echo tag handler must implement the javax.sevlet.jsp.tagext.DynamicAttributes interface

第2题：

Which statements concerning the methods notify（） and notifyAll（） are true？  

• A、Instances of class Thread have a method called notify（）.
• B、A call to the method notify（） will wake the thread that currently owns the monitor of the object.
• C、The method notify（） is synchronized.
• D、The method notifyAll（） is defined in class Thread.
• E、When there is more than one thread waiting to obtain the monitor of an object， there is no way to be     sure which thread will be notified by the notify（） method.

第3题：

第4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.

第5题：

Which method must be defined by a class implementing the java.lang.Runnable interface？ （） 

• A、 void run（）
• B、 public void run（）
• C、 public void start（）
• D、 void run（int priority）
• E、 public void run（int priority）
• F、 public void start（int priority）

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.

第7题：

What is a limitation of implementing uRPF？（）

• A、MPLS LDP must be enabled.
• B、BGP routing protocol must be running.
• C、Named access-lists must be configured.
• D、Symmetrical routing is required.
• E、Domain name must be defined

第8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.

第9题：

It is desirable that a certain method within a certain class can only be accessed by classes that are defined within the same package as the class of the method. How can such restrictions be enforced？（）  

• A、Mark the method with the keyword public.
• B、Mark the method with the keyword protected.
• C、Mark the method with the keyword private.
• D、Mark the method with the keyword package.
• E、Do not mark the method with any accessibility modifiers.

第10题：

A developer wants too use EL to invoke a function using S{my：bloof（“foof”）}. Which is always true？（）

• A、 The method invoked by this function must be statie.
• B、 The function class must implement the Function interface.
• C、 The expression is NOT a valid EL expression for invoking a function.
• D、 The function must be declared in a web.xml file using the  element.
• E、 The function class must have a method with the signature：Void bloof （java.lang.Strings）