Professional: Scwcd Certification

by Dalton, Sam/Jepp, Dan

• ISBN13: 9781861007704
• ISBN10: 1861007701
• Edition: CD
• Format: Trade Paper
• Copyright: 2002-11-26
• Publisher: Springer-Verlag New York Inc

Table of Contents

Introduction to the SCWCD Exam	1	(1)
The Exam	1	(1)
Why Take the Exam?	2	(1)
Why You Shouldn't Take the Exam	3	(1)
Common Mistakes	3	(1)
What's Next?	4	(1)
Further Study	4	(1)
Best Practices	4	(1)
How to Use This Book	5	(2)
The Exam Objectives and the Structure of this Book	5	(1)
Good Study Technique	5	(1)
The Case Study	6	(1)
Try Your New Skills out by Extending the Case Study	6	(1)
This Book as a Reference Work	7	(1)
The CD	7	(2)
WHIZlabs	7	(1)
About WroxSCWCD@Whiz	7	(1)
Other Software	8	(1)
Example Sourcecode	8	(1)
Jakarta Tomcat	9	(1)
Jakarta Ant	9	(1)
Before We Begin	9	(1)
Where to Find the Authors	10	(1)
Conventions	10	(1)
Customer Support	11	(1)
How to Download the Sample Code	11	(1)
Errata	11	(1)
E-Mail Support	12	(1)
p2p.wrox.com	12	(3)
The Servlet Model	15	(32)
The Servlet Model	17	(20)
For each of the HTTP methods, Get, Post, and Put, identify the corresponding method in the HttpServlet class	19	(2)
For each of the HTTP methods, Get, Post, and Head, identify triggers that might cause a browser to use the method, and identify benefits or functionality of the method	21	(1)
HTTP Get	21	(1)
HTTP Post	21	(1)
HTTP Head	22	(1)
HTTP Put	22	(1)
For each of the following operations, identify the interface and method name that should be used:	22	(1)
Retrieve HTML form parameters from the request	22	(2)
Retrieve a servlet initialization parameter	24	(1)
Retrieve HTTP request header information	25	(3)
Set an HTTP response header; Set the content type of the response	28	(1)
Acquire a text stream for the response	29	(1)
Acquire a binary stream for the response	30	(1)
Redirect an HTTP request to another URL	30	(1)
Identify the interface and method to access values and resources and to set object attributes within the following three Web scopes:	31	(1)
Request	31	(1)
Session	32	(1)
Context	33	(1)
Given a life-cycle method: init, service, or destroy, identify correct statements about its purpose or about how and when it is invoked	34	(1)
Servlet	34	(1)
Use a RequestDispatcher to include or forward to a Web resource	35	(1)
Obtaining a Request Dispatcher	36	(1)
Summary	37	(4)
Sample Questions	41	(6)
The Structure and Deployment of Modern Servlet Web Applications	47	(16)
The Structure and Deployment of Modern Servlet Web Applications	48	(9)
Identify the structure of a Web Application and Web Archive file, the name of the Web App deployment descriptor, and the name of the directories where you place the following:	49	(1)
The WebApp deployment descriptor	49	(1)
The WebApp class files	49	(1)
Any auxiliary JAR files	49	(3)
Match the name with a description of purpose or functionality, for each of the following deployment descriptor elements:	52	(2)
Servlet instance, Servlet name, and Servlet class	54	(1)
Initialization parameters	54	(2)
URL to named servlet mapping	56	(1)
Summary	57	(2)
Sample Questions	59	(4)
The Servlet Container Model	63	(22)
The Servlet Container Model	64	(12)
Identify the uses for and the interfaces (or classes) and methods to achieve the following features:	64	(1)
Servlet context init. parameters	64	(3)
Servlet context listener	67	(2)
Servlet context attribute listener	69	(1)
Session attribute listeners	70	(1)
Other Listeners	71	(1)
Identify the WebApp deployment descriptor element name that declares the following features:	72	(1)
Servlet context init. parameters	72	(1)
Servlet context listener; Servlet context attribute listener; Session attribute listeners	73	(1)
Distinguish the behavior of the following in a distributable web application:	74	(1)
Servlet context init. parameters	75	(1)
Servlet context listener; Servlet context attribute listener	76	(1)
Session attribute listeners	76	(1)
Summary	76	(3)
Sample Questions	79	(6)
Designing and Developing Servlets to Handle Server-Side Exceptions	85	(22)
Designing and Developing Servlets to Handle Server-Side Exceptions	86	(13)
For each of the following cases, identify correctly constructed code for handling business logic exceptions, and match that code with correct statements about the code's behavior:	86	(1)
Return an HTTP error using the setStatus method	87	(4)
Return an HTTP error using the sendError method	91	(2)
Given a set of business logic exceptions, identify the following:	93	(1)
The configuration that the deployment descriptor uses to handle each exception	93	(1)
Specify the handling declaratively in the deployment descriptor	94	(1)
How to use a Request Dispatcher to forward the request to an error page	94	(3)
Identify the method used for the following:	97	(1)
Write a message to the WebApp log	97	(1)
Write a message and exception to the WebApp log	98	(1)
Summary	99	(2)
Sample Questions	101	(6)
Designing and Developing Servlets Using Session Management	107	(24)
Session Tracking	108	(1)
Session Tracking Mechanisms	108	(1)
Cookies	108	(1)
SSL Sessions	109	(1)
URL-Rewriting	109	(1)
Designing and Developing Servlets Using Session Management	109	(13)
Identify the interface and method for each of the following:	109	(1)
Retrieve a session object across multiple requests to the same or different servlets within the same WebApp	109	(1)
Store objects into a session object	110	(5)
Retrieve objects from a session object	115	(2)
Respond to the event when a particular object is added to a session	117	(1)
Respond to the event when a session is created and destroyed	118	(1)
Expunge a session object	118	(1)
Given a scenario, state whether a session object will be invalidated	119	(1)
Explicit Invalidation	119	(1)
Default Session Timeout	119	(2)
Given that URL-rewriting must be used for session management, identify the design requirement on session-related HTML pages	121	(1)
Summary	122	(3)
Sample Questions	125	(6)
Designing and Developing Secure Web Applications	131	(22)
Designing and Developing Secure Web Applications	132	(14)
Identify correct descriptions or statements about the security issues:	132	(1)
Authentication	132	(1)
Authorization	132	(1)
Data integrity	132	(1)
Auditing	132	(1)
Malicious code	133	(1)
Web site attacks	133	(1)
Identify the deployment descriptor element names, and their structure, that declare the following:	133	(1)
A security constraint	133	(1)
A Web resource	134	(1)
The login configuration	134	(1)
A security role	135	(6)
Given an authentication type: Basic, Digest, Form, and Client-Cert, identify the correct definition of its mechanism	141	(1)
Basic Authentication	142	(1)
Digest Authentication	143	(1)
Form-based Authentication	143	(2)
Client-Cert Authentication	145	(1)
Summary	146	(2)
Sample Questions	148	(5)
Designing and Developing Thread-Safe Servlets	153	(18)
Servlets and Threads	154	(1)
Designing and Developing Thread-Safe Servlets	155	(9)
Identify which attribute scopes are thread-safe:	155	(1)
Local variables	155	(1)
Instance variables	155	(1)
Class variables	156	(1)
Request attributes	157	(1)
Session attributes	157	(3)
Context Attributes	160	(1)
Recap	160	(1)
Identify correct statements about differences between the multi-threaded and single-threaded servlet models	160	(1)
Multi-Threaded Model	161	(1)
Single-Threaded Model	161	(2)
Identify the interface used to declare that a servlet must use the single thread model	163	(1)
Summary	164	(1)
Sample Questions	165	(6)
The JavaServer Pages (JSP) Technology Model	171	(28)
The JavaServer Pages (JSP) Technology Model	173	(18)
Write the opening and closing tags for the following JSP tag types:	173	(1)
Directive	173	(1)
Declaration	174	(1)
Scriptlet	174	(1)
Expression	175	(1)
Actions (Tags)	176	(1)
Given a type of JSP tag, identify correct statements about its purpose or use	176	(1)
Directives	176	(1)
Declaration	177	(1)
Scriptlets	177	(1)
Expressions	178	(1)
Given a JSP tag type, identify the equivalent XML-based tags	179	(1)
Identify the page directive attribute, and its values, that:	180	(1)
Import a Java class into the JSP page	181	(1)
Declare that a JSP page exists within a session	181	(1)
Declare that a JSP page uses an error page	182	(1)
Declare that a JSP page is an error page	182	(1)
Additional Page Directive Attributes	183	(1)
Identify and put in sequence the following elements of the JSP page lifecycle: Page translation, JSP page compilation, Load class, Create instance, Call jsplnit, Call jspService, Call jspDestroy	183	(1)
Translation	183	(1)
Initialization	184	(1)
Servicing	184	(1)
Destruction	185	(1)
Match correct descriptions about purpose, function, or use with any of the following implicit objects:	185	(1)
request	185	(1)
response	186	(1)
out	186	(1)
session	186	(1)
config	187	(1)
application	187	(1)
page	187	(1)
pageContext	187	(1)
exception	188	(1)
Distinguish correct and incorrect scriptlet code for:	188	(1)
A conditional statement	188	(1)
An iteration statement	189	(2)
Summary	191	(4)
Sample Questions	195	(4)
Designing and Developing Reusable Web Components	199	(16)
Web Components and Reusability	200	(1)
Designing and Developing Reusable Web Components	200	(9)
Given a description of required functionality, identify the JSP page directive or standard tag in the correct format with the correct attributes required, to specify the inclusion of a Web component into the JSP page	200	(1)
include Directive	200	(3)
include Action	203	(5)
Which Do I Use?	208	(1)
Summary	209	(2)
Sample Questions	211	(4)
Designing and Developing JSP Pages Using JavaBean Components	215	(26)
The JavaBean Component Architecture	216	(2)
Designing and Developing JSP Pages Using JavaBean Components	218	(12)
For any of the following tag functions, match the correctly constructed tag, with attributes and values as appropriate, with the corresponding description of the tag's functionality	218	(1)
Declare the use of a JavaBean component within the page	218	(2)
Specify, for jsp:useBean or jsp:getProperty tags, the name of an attribute;
Specify, for a jsp:useBean tag the class of the attribute;
Specify, for a jsp:useBean tag the scope of the attribute	220	(3)
Access or mutate a property from a declared JavaBean	223	(1)
Specify, for a jsp:getProperty tag, the property of the attribute	223	(1)
Specify, for a jsp:setProperty tag, the property of the attribute to mutate, and the new value	224	(2)
Given JSP page attribute scopes: request, session, application, identify the equivalent servlet code	226	(3)
Identify techniques that access a declared JavaBean component	229	(1)
Summary	230	(4)
Sample Questions	234	(7)
Designing and Developing JSP Pages Using Custom Tags	241	(18)
Designing and Developing JSP Pages Using Custom Tags	242	(10)
Identify properly formatted tag library declarations in the web application deployment descriptor	242	(1)
Identify properly formatted taglib directives in a JSP page	243	(1)
Option 1 -- Absolute URI	244	(1)
Option 2 -- Relative URI	245	(1)
Option 3 -- Packaged JAR	245	(1)
Given a custom tag library, identify properly formatted custom tag usage in a JSP page	246	(1)
An empty custom tag	246	(1)
A custom tag with attributes	247	(2)
A custom tag that surrounds other JSP code	249	(1)
Nested custom tags	249	(1)
Custom Tag Example	249	(3)
Summary	252	(2)
Sample Questions	254	(5)
Designing and Developing a Custom Tag Library	259	(34)
Tag Library Descriptors	261	(2)
Designing and Developing a Custom Tag Library	263	(3)
Identify the tag library descriptor element names that declare the following:	263	(1)
The name of the tag	263	(1)
The class of the tag handler	263	(1)
The type of content that the tag accepts	263	(1)
Any attributes of the tag	264	(1)
Identify the tag library descriptor element names that declare the following:	265	(1)
The name of a tag attribute	265	(1)
Whether a tag attribute is required	265	(1)
Whether or not the attribute's value can be dynamically specified	265	(1)
Using Custom Tags on JSP Pages	266	(2)
Given a custom tag, identify the necessary value for the body-content TLD element for any of the following tag types:	266	(1)
Empty tag	266	(1)
Custom tag that surrounds other JSP code	267	(1)
Custom tag that surrounds content that is used only by the tag handler	267	(1)
Coding Custom Tags	268	(12)
Given a tag event method (doStartTag, doAfterBody, and doEndTag), identify the correct description of the method's trigger	269	(5)
Identify valid return values for the following methods:	274	(1)
doStartTag()	274	(1)
doEndTag()	275	(1)
doAfterBody()	275	(1)
pageContext.getOut()	275	(3)
Given a ``Body'' or ``Page'' constant, identify a correct description of the constant's use in the following methods: doStartTag(), doEndTag(), doAfterBody()	278	(1)
Identify the method in the custom tag handler that accesses:	279	(1)
A given JSP page's implicit variables	279	(1)
The JSP page's attributes	280	(1)
Co-Operating Tags	280	(5)
Identify methods that return an outer tag handler from within an inner tag handler	281	(4)
Summary	285	(3)
Sample Questions	288	(5)
J2EE Design Patterns	293	(30)
What are Patterns?	294	(1)
Why Do We Need Design Patterns?	295	(1)
How Do We Document Patterns?	295	(11)
Given a scenario description with a list of issues, select the design pattern (Value Objects, MVC, Data Access Object, or Business Delegate) that would best solve those issues	296	(1)
Required Patterns for the Exam	297	(1)
The Value Object Pattern	298	(2)
The Model-View-Controller Pattern	300	(2)
Data Access Object Pattern	302	(2)
Business Delegate Pattern	304	(1)
Match design patterns with statements describing potential benefits that accrue from the use of the pattern, for any of the following patterns:	305	(1)
Value Object	306	(1)
Model-View-Controller	306	(1)
Data Access Object	306	(1)
Business Delegate	306	(1)
Patterns Example	306	(8)
Wrox Store	307	(1)
MVC Pattern for the Store	307	(3)
VO Pattern in the Store	310	(1)
Business Delegate Pattern in the Store	311	(1)
Data Access Object Pattern in the Store	312	(2)
The Store in Action	314	(1)
Some More Patterns	314	(4)
View Helper	315	(1)
Composite View	315	(1)
Service To Worker	316	(1)
Dispatcher View	317	(1)
Summary	318	(2)
Sample Questions	320	(3)
Web Application Case Study	323	(52)
Setting the Scene	324	(2)
Building the Example	326	(41)
The UserVO Class	326	(1)
The ThreadVO Class	327	(2)
The TopicVO Class	329	(1)
The PostVO Object	330	(1)
Accessing the Data	331	(1)
Choice of the Database	331	(1)
The users Table	331	(1)
The topic Table	331	(1)
The thread Table	332	(1)
The post Table	332	(1)
The roles Table	332	(1)
The UserDAO Object	332	(3)
The TopicDAO Object	335	(2)
The ThreadDAO Object	337	(3)
The PostDAO Object	340	(2)
The Front Controller and Action Framework	342	(1)
The Controller Servlet	343	(1)
The Action Classes	344	(8)
Potential Improvements	352	(1)
The Forum Front-End	352	(1)
The Iterator Tag	353	(2)
The RoleTag Tag	355	(1)
The FindUser Tag	355	(1)
The Forum JSP Pages	356	(11)
Deploying the Forum	367	(4)
The Deployment Descriptor	367	(2)
The Tag Library Descriptor	369	(2)
Packaging and Deploying the Forum	371	(1)
Future Improvements	371	(1)
Summary	372	(3)
Servlet Filters	375	(20)
Servlet Filters	375	(17)
Filter Mechanics	376	(1)
The Filter Interface	377	(1)
The FilterConfig Interface	377	(1)
The HttpServletResponseWrapper Class	378	(2)
Defining and Mapping Filters	380	(1)
Filter Chaining	381	(7)
Deploying the XSL Filter	388	(1)
The XSL Filter in Action	388	(1)
Filter Chaining in Action	389	(2)
Designing Filters	391	(1)
Summary	392	(3)
Appendix A: Installing Tomcat	395	(12)
Tomcat in Context	395	(1)
Tomcat Components	396	(1)
A Basic Tomcat Installation	396	(11)
Tomcat Directory Structure	399	(1)
Tomcat Configuration	400	(1)
Deploying Web Applications	400	(1)
Changing Tomcat's Port	401	(1)
The manager Application	402	(1)
Using the manager to Install an Application	403	(1)
Using the manager to List Running Applications	403	(1)
Using the manager to Reload a Running Application	404	(1)
Using the manager to Start or Stop an Existing Application	404	(1)
Other manager Commands	405	(2)
Appendix B: Using WroxSCWCD@Whiz	407	(8)
Mock Test	407	(1)
Interactive Quiz	408	(1)
Quick Revision Tips	409	(1)
Detailed Explanations and Performance Evaluation	409	(1)
Instructions	410	(2)
Getting Started and Installing	412	(1)
For Windows (WroxSCWCDWhiz.exe)	412	(1)
For Unix/Linux (WroxSCWCDWhiz.bin)	412	(3)
Appendix C: Exercise Answers	415	(16)
Index	431