Recognizing Representations of UMl Associations in Java

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Recognizing Representations of UMl Associations
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9. What is the class-relationship term for an is-a relationship A. Synchronization B. Association
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C. Participation D. Generalization Answer:
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3 D . Generalization is used to describe inheritance and the is-a relationship.
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, B, and C are incorrect. A is incorrect because synchronization is not a term used for A class relationships. B is incorrect because association uses the term has-a to describe its relationships. C is incorrect because participation is not a term used for class relationships. 10. Which of the following is an invalid multiplicity indicator A. 0..* B. 0..1 C. 5 D. 7..6 Answer:
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3 D . The range cannot decrease. [6..7] would have been an acceptable multiplicity indicator.
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A, B,and C are incorrect. [0..*], [0..1], and [5] all represent valid multiplicity indicators. 11. Consider the following illustration. Which class relationships are represented (Select all that apply.)
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A. Directed association B. Composition association C. Aggregation association D. Generalization
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9:
Representing Object-Oriented Concepts with UML
Answer:
3 A and C. Aggregation and directed association are both represented in the diagram. Aggregation is represented with a clear diamond. Directed association is represented with an arrow.
and D are incorrect. B is incorrect because composition association is not represented in B the diagram. D is incorrect because generalization is not represented in the diagram. 12. What are commonly used with multiplicity indicators for clarification of associations A. Visibility modifiers B. Additional compartments C. Role names D. Notes Answer:
3 C . Role names are commonly used with multiplicity indicators for clarification purposes.
A, B, nd D are incorrect. Visibility modifiers, additional compartments, and notes are not a directly used with multiplicity indicators.
Part III
Java-Related Platforms and Technologies
s
10 11 12 Understanding Java-Related Platforms and Integration Technologies Understanding Client-Side Technologies Understanding Server-Side Technologies
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Understanding JavaRelated Platforms and Integration Technologies
CertIFICatION OBJeCtIVes
l l
nderstanding Java Platforms U orking with the Java Remote W Method Invocation API orking with Database W Technologies
W orking with Additional Java Integration APIs Two-Minute Drill
Q&A Self Test
10:
Understanding Java-Related Platforms and Integration Technologies
ava-based technologies provide the components and means necessary for creating client, client-server, enterprise, and mobile applications. Figure 10-1 represents a good portion of these technologies. The figure also includes other important technologies that are not Java-based (for example, SQL). Review this figure because all of the technologies represented are on the exam. These technologies are also covered in s 11 and 12, as well as this chapter. The technologies are needed to be understood only from a high level. For example, you ll need to know what JavaServer Pages is, why it s used, and its key benefits. You will not be asked to create a JavaServer Pages web page or describe its low-level details, however. When you are ready to dive in deeper, you can find lower-level types of questions in Sun s specialty exams, such as the Sun Certified Web Component Developer. High-level knowledge, as obtained from this study guide, will help you lead yourself and/or your team in selecting the most appropriate and optimal Java-based solution, as well as pass the SCJA exam. This chapter will provide you with the high-level platform information needed for the exam, discussing the general layout of Java SE, Java ME, and Java EE. The RMI, JDBC, and JNDI integration technologies will also be discussed as needed for the exam. A few thoughts may cross your mind when reading through these sections such as, Specifically, how do I develop with these technologies Why isn t this book showing me any sample code for the APIs For the SCJA exam, Coding against the technology APIs, Java ME, and Java EE platforms is beyond the scope of the SCJA exam. You simply need to know what the technologies are, their benefits, and when to use them.
You may see the original shorthand for Java platforms in the exam referenced as J2SE, J2ME, and J2EE. Currently, the platforms are known as Java SE, Java ME, and Java EE, respectively.
Understanding Java-Related Platforms and Integration Technologies
FIgure 10-1
Java technologies
User Machine (Client Tier)
Web-based Client Container
Application Client Container
Applet Container
This figure details Javarelated components on the SCJA exam.
HTML
Java Swing API Applet
JavaScript
Java Remote Method Invocation API
Note that the JNDI API, messaging, JMS API, RMI API, JDBC API, JAXRPC API, JavaMail API, SMTP, and Web Services (SOAP, UDI, WSDL XML) all integrate with and/or are a part of Java EE.
Enterprise Server (Middle-Tier) Web Container (Web Tier) EJB Container (Business Tier)
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