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Code d'Examen: 1Z0-869
Nom d'Examen: Oracle (Java Mobile Edition 1 Mobile Application Developer Certified Professional Exam)
Questions et réponses: 340 Q&As

Code d'Examen: 1Z0-868
Nom d'Examen: Oracle (Java Enterprise Edition 5 Enterprise Architect Certified Master Upgrade Exam)
Questions et réponses: 144 Q&As

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Nom d'Examen: Oracle (Java Enterprise Edition 5 Enterprise Architect Certified Master Exam (Step 1 of 3))
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Code d'Examen: 1Z0-863
Nom d'Examen: Oracle (Java Enterprise Edition 5 Web Services Developer Certified Professional Upgrade Exam)
Questions et réponses: 96 Q&As

Code d'Examen: 1Z0-862
Nom d'Examen: Oracle (Java Enterprise Edition 5 Web Services Developer Certified Professional Exam)
Questions et réponses: 183 Q&As

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NO.1 Which Java EE feature helps facilitate migration to SOA?
A. Stateful session beans can be exposed as web services.
B. Stateless session beans can be exposed as web services.
C. Stateful session beans support local and remote interfaces.
D. Stateless session beans support local and remote interfaces.
Answer: B

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NO.2 What describes the design relationship between session beans and entity beans?
A. aggregation
B. separation of concerns
C. common reuse principle
D. Liskov substitution principle
E. interface segregation principle
Answer: B

Oracle   1Z0-868   1Z0-868   1Z0-868   1Z0-868 examen

NO.3 An existing web application uses JSPs to communicate directly to a database. Small changes to the
database result in business logic changes to many JSPs. The single JSP developer, who was also the
graphic artist, has just quit the project. In addition, the company needs to add a web services-based
interface to the application. You have been hired as the architect to refactor the web application. Which
two changes should you make to accomplish this? (Choose two.)
A. introduce a separate presentation layer with different views for HTML and XML
B. add an abstraction layer between the database and JSPs to encapsulate business logic
C. develop a DAO layer to encapsulate the database access that can be used by all the JSPs
D. add new JSPs for the XML and use <jsp:include> to incorporate the existing business logic
Answer: A,B

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NO.4 A successful web application is used by over two hundred thousand users. Due to this substantial load,
the database is overburdened and fails frequently. All data, including critical user records and temporary
session data, are stored in the database. Because of resource constraints, a new database system
cannot be installed. Which change will reduce the load on the database?
A. create more entity beans to optimize the interaction with the database
B. refactor the web application to use DAOs to communicate with the database
C. refactor the web application to store temporary session data on the web servers
D. add more web servers to the web tier to distribute the load and reduce the number of
transactions on the database
Answer: C

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NO.5 Which application would NOT be a good candidate for an EJB-centric implementation of the business
tier?
A. an application that transfers money between accounts
B. a news-oriented web site that receives millions of hits a day
C. an application with business logic that calls third-party web services
D. a small workflow-oriented application to provision and deprovision employee accounts
Answer: B

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NO.6 You are architecting a new Internet-deployed application and you want to restrict access to parts of the
system for security purposes. Which three security restrictions can be specified in the deployment
descriptor according to the servlet API specification standards? (Choose three.)
A. on page forwarding
B. on encryption methods
C. based on the role name
D. based on the user name
E. based on the URL pattern
F. based on the HTTP method
Answer: C,E,F

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NO.7 You are architecting an online ordering application with these requirements:
Users access the system over the Internet using HTML.
An email message is sent to the user confirming the order.
Users must log in and are validated using LDAP.
The product catalog is stored in a relational database.
All orders are logged to the internal fulfillment system.
Orders must not be lost.
Which Java EE technology should be used to send orders to the fulfillment system?
A. JNDI
B. JMS
C. JAX-WS
D. RMI-IIOP
Answer: B

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NO.8 A Java EE travel agency application builds flight itineraries and needs to provide runtime
monitoring to external clients. Agency managers need to find out at any given time how many itineraries
have been started but not completed. This information should be made available to managers at runtime
using open-source or commercially available management tools. The instrumentation should be done
with a standard Java EE API. How should you instrument the application?
A. JPA
B. JMX
C. JMS
D. SNMP
Answer: B

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NO.9 Which two statements are true about the Flyweight pattern? (Choose two.)
A. It allows a single instance of a class to virtually represent many instances.
B. When used appropriately it can reduce memory demands on your servers.
C. It allows for many instances of a class to be controlled by a single instance.
D. It allows many tightly related, homogeneous objects to each maintain their own state.
Answer: A,B

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NO.10 You are asked to architect an SOA solution that leverages Java web services. The architecture needs to
be flexible and allow for the SOAP 1.1, SOAP 1.2, and REST implementations. Which Java EE
technology should you use?
A. JAXP
B. JAXB
C. JAX-WS
D. JAX-RPC
Answer: C

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NO.11 You are designing a company e-Commerce site. The site will be hosted on a single powerful server
that has sufficient CPU, memory, storage, and network bandwidth so that clustering is not needed. The
architecture must maintain session state including a shopping cart and recent searches. JSP and JPA
have already been selected as the presentation tier and persistence tier implementations, respectively.
What do you recommend as the most appropriate way to maintain session state in the application?
A. an entity bean
B. stateful session beans
C. the HttpSession object
D. a message-driven bean
Answer: C

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NO.12 You work for a small IT shop. The developers are responsible for deploying production
applications. All of the connection and resource parameters are distributed in the Java source code. Your
IT shop has a limited infrastructure so there have been few issues with pushing production applications.
Your IT shop has been purchased and is now reselling Java products to customers. You now have
dedicated development, testing, staging, and production environments. A new requirement states that
these applications must support rapid deployment to each environment. What is the best solution.?
A. refactor the Java application to use JNDI names and resource references
B. identify a build engineer that has the responsibility of modifying the constant class for each deployment
C. set your connection properties in a constants class to consolidate connection and resource parameters
D. identify the environment parameters for connection and resources and make them readily available to
developers
Answer: A

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NO.13 DRAG DROP
Answer:

NO.14 What are three web service support features in Java EE? (Choose three.)
A. generating a web service from an MDB
B. generating a Java class from a WSDL file
C. associating a Java class with a WSDL file
D. associating a JMS queue with a WSDL file
E. generating a web service from a stateful session bean
F. generating a web service from a stateless session bean
Answer: B,C,F

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NO.15 A company is in the business of distributing hard candies. The distribution of these candies is
automated and the system that helps track information about candy distribution is written in Java
technology. The business unit for the company has been asking the IT group to provide a flexible
reporting system to track detailed information. A large amount of data about candy is stored using a DAO
layer, but little is used. What is the best solution for the IT group to implement to provide the most flexibility
for the business unit?
A. refactor the DAOs to include additional static queries to pull information and export a
spreadsheet for the business unit to review
B. implement an ad-hoc query tool exposed using JSF that allows business units to create queries and
produce results in a given format
C. provide a JSP page, which has scriptlets that expose pre-defined queries for the business unit to
execute and display in HTML
D. create a web service that exposes fixed queries invoked by a JSP client that can pull data from the
database and export in a given format
Answer: B

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NO.16 You are architecting a complex multi-tiered web application. Within each tier you have designed layers,
the lowest being the hardware layer and the highest being the application layer. Which statement is true?
A. Generally, a given layer in one tier of this application should be concerned with the technology used in
the same layer of adjacent tiers.
B. To maximize separation of concerns, a given layer in a tier of this application should only have
knowledge of the adjacent layer in that tier.
C. For any given tier, separation of concerns is fulfilled when a given layer in that tier knows or needs to
know little or nothing of the layers below it.
D. If the layers in one tier of the application have been designed to achieve separation of
concerns, then the remaining tiers also achieve separation of concerns by default.
Answer: B

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NO.17 Which two characteristics are NOT important factors in the selection of a web application framework
for a large project? (Choose two.)
A. complexity of the framework
B. degree of usage in the industry
C. availability of a unit test framework
D. reusability of model and view components
E. separation of concerns afforded by the framework
F. level of integration with common logging frameworks
Answer: C,F

Oracle   1Z0-868   certification 1Z0-868   certification 1Z0-868   1Z0-868

NO.18 What are two advantages of using encapsulation in a multi-tier architecture? (Choose two.)
A. Business components inherit behavior from the web container.
B. Complex web container behavior can be hidden behind simple interfaces.
C. Business logic can be modified without modifying objects that depend on it.
D. Database records can be accessed directly from the web tier to improve scalability and
performance.
Answer: B,C

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NO.19 A company has a legacy system that it is going to use Java EE technology to re-engineer. The legacy
solution consists of active server pages and a relational database. The company is interested in changing
DB vendors in the future and this requirement is key to moving forward.
This is a web-based transactional sales system. The company will keep the relational database schema
because it still meets business requirements and will not require re-engineering. What is
the best solution?
A. JSP, JDBC only
B. JSP, servlets, JDBC only
C. JSF, servlets, JPA, EJB3
D. JSF, servlets, DAO, JDBC
Answer: C

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NO.20 A company architected and developed a Java EE application and now they are having problems with
the scalability of the system. The application uses JSPs and servlets deployed to a web container, and
stateless session beans and DAOs deployed to an EJB container. The application's non-functional
requirement for scalability is to support 500 concurrent users during peak hours of operation. The
application can currently support 500 concurrent users, but the response time is 200 percent of what it is
acceptable. You have been hired as an architect and have been assigned to help resolve this problem.
The company's management is concerned with the hardware budgeting. What initial advice would you
give to the company?
A. add another web server
B. start a new project to re-architect the application
C. monitor the application to determine the potential problem areas
D. add more memory and processors to the hardware hosting the EJB container
Answer: C

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Code d'Examen: 1Z0-869
Nom d'Examen: Oracle (Java Mobile Edition 1 Mobile Application Developer Certified Professional Exam)
Questions et réponses: 340 Q&As

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NO.1 Which three statements are true regarding the handling of wireless connections? (Choose three.)
A. Devices can only support one HttpConnection at a time; therefore, network access from
multiple threads must be serialized.
B. The connection could unexpectedly terminate while processing the input or output streams.
C. Performing network operations on the same thread used by the display is likely to block
refreshes of the display until the network operations complete.
D. A network connection could interfere with other services on the device, such as the ability to receive
phone calls or SMS on a phone.
E. Network connections should never be performed on a separate thread, so problems can be handled
quickly.
Answer: B,C,D

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NO.2 Click the Exhibit button.
Which two are true assuming this method is in a MIDlet? (Choose two.)
A. The Chocolate Prefs choice is never displayed to the user.
B. Compilation fails due to a problem with code related to event handling.
C. The text "You made a choice" is displayed immediately after the user makes a selection.
D. The user can select more than one type of chocolate.
E. An exception occurs at runtime due to a problem related to the event handling code.
F. Anonymous inner classes must NOT be used as event handlers within a MIDlet.
Answer: C,D

Oracle examen   1Z0-869   1Z0-869   1Z0-869

NO.3 Given the push connection string:
MIDlet-Push-1: socket://:79, com.sun.example.SampleChat, 192.3?.?.*
Which two addresses are allowed to push connection notifications to the application? (Choose two.)
A. 192.31.101.1
B. 192.32.1.101
C. 192.310.101.1
D. 192.3.1.101
E. 192.31.1.1
F. 192.310.10.1
Answer: B,E

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NO.4 Which two methods are available in both the low-level and high-level APIs? (Choose two.)
A. getLayout()
B. getTitle()
C. isShown()
D. setFullScreenMode()
Answer: B,C

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NO.5 A MIDlet has entered the paused state. Which is a valid action to attempt to make it active?
A. The MIDlet cannot revert back to the active state.
B. The MIDlet calls resumeRequest() through a timer.
C. The MIDlet calls its own startApp() method.
D. The MIDlet has to wait quietly to be rescheduled.
Answer: B

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NO.6 Given:
10. MessageConnection conn;
11.
12. public void startApp() {
13. try {
14. conn = (MessageConnection) Connector.open("cbs://:3382");
15. //...
17. } catch (Exception e) {
18. //...
20. }
21. }
22.
30. public void run() {
31. Message msg = conn.receive();
32. //...
40. conn.send(msg);
41. }
What is the result?
A. An error at line 40 causes an exception at runtime.
B. An error at line 14 causes compile to fail.
C. An error at line 31 causes an exception at runtime.
D. The code successfully sends a message.
E. An error at line 14 causes an exception at runtime.
Answer: A

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NO.7 Which two are true for List? (Choose two.)
A. You can add Command objects to a List without registering a CommandListener.
B. Images and text in a List CANNOT be changed once the List is created.
C. Traversing and scrolling in a List causes events that can be programmatically detected.
D. A CommandListener must be registered for the application to recognize user selections in a List.
Answer: A,D

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NO.8 Which two are true about errors and exceptions in a CLDC-compliant virtual machine? (Choose two.)
A. A CLDC-compliant virtual machine must NOT throw a VirtualMachineError.
B. Developers are NOT allowed to handle errors.
C. Developers do NOT receive asynchronous exceptions from a CLDC-compliant virtual machine.
D. Developers must throw only checked (non-runtime) exceptions.
E. Rather than throwing the Error class specified by the Java Language Specification, the
CLDC-compliant virtual machine may throw a CLDC-supported superclass.
Answer: C,E

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NO.9 A Player plays a sound after start() is called. Which is the most efficient way to pause the playback so
that it may be started as soon as possible when required?
A. call setRate(0) on the player
B. call stop() on the player
C. call close() on the player
D. call System.gc() to collect those resources marked for garbage collection
Answer: B

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NO.10 DRAG DROP
Click the Task button. Place each player state next to its description.
Answer:

NO.11 Which JAD attribute must be present to begin the MIDlet suite authentication process using X.509
PKI?
A. MIDlet-Permission
B. MIDlet-Jar-RSA-SHA1
C. MIDlet-Certificate-n-m
D. MIDlet-Permission-Opt
Answer: B

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NO.12 Given:
10. //...
20. int[] foo = new int[10000];
21. foo = null;
22. System.gc();
23. //...
Which is true once the program execution reaches line 23?
A. The garbage collector suspends the program until more memory becomes available.
B. The garbage collector CANNOT reclaim the memory allocated to foo because the reference is
nulled out.
C. The garbage collector is triggered and memory is guaranteed to be reclaimed.
D. The garbage collector is triggered but there are no guarantees that any memory has been reclaimed.
Answer: D

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NO.13 DRAG DROP
Click the Task button.
Place the appropriate platform label on the class name. If the class exists in both CLDC and J2SE,
choose the "Exists in BOTH..." option, regardless of whether the package names are different.
Answer:

NO.14 A MIDlet suite is signed using X.509 PKI. Which encoding format must be used for the certificate
entries in the JAD file?
A. yEnc
B. binary
C. none
D. base64
Answer: D

Oracle   1Z0-869   1Z0-869

NO.15 A suite is signed with a X.509 PKI certificate. The root certificate is not present in the device's keystore.
What is the installation result?
A. The JAD file is rejected. Installation fails.
B. The JAD file is rejected. It installs in the untrusted domain.
C. Authentication fails. It installs in the untrusted domain.
D. Authentication fails. Installation fails.
Answer: D

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NO.16 Click the Exhibit button.
Given the GameCanvas code:
10. public void run() {
11. try {
12. Graphics g = getGraphics();
13. Image dog = Image.createImage("/dog.png");
14. Sprite s = new Sprite(dog, 98, 88);
15. s.setPosition(0,0);
16. while (gameActive) {
17. s.setFrame(0);
18. s.paint(g);
19. flushGraphics();
20. s.setFrame(1);
21. s.paint(g);
22. flushGraphics();
23. }
24. } catch (Exception ex) {
25. //...
31. }
32. }
Assuming that gameActive is true, and that run() is called as a result of a new thread's start() invocation,
what is the result?
A. An exception is thrown at runtime because of an error with the arguments to the Sprite
constructor.
B. An IndexOutOfBoundsException occurs due to an error in line 17 or line 20.
C. The dog on the left side of the image file appears on the display, but the dog on the right side is never
seen.
D. Compilation fails because Sprite does NOT have a paint(Graphics g) method.
E. An animation appears that continuously cycles between the two versions of the dog.
Answer: E

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NO.17 Which method is initially called when the MIDlet starts in response to a push notification?
A. PushRegistry.listConnections()
B. PushRegistry.notifyIncomingConnection()
C. MIDlet.startApp()
D. MIDlet.notifyApp()
E. MIDlet.pushApp()
F. MIDlet.resumeRequest()
Answer: C

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NO.18 Given:
10. //...
20. try {
21. Hashtable table = new Hashtable();
22. for (;;) table.put(new Object(), new Object());
23. } catch (OutOfMemoryException e) {
24. Display.getDisplay().setCurrent(new Alert("Out of Memory!"));
25. }
26. //...
Which is true?
A. Out of Memory! is printed to the system console.
B. An exception is thrown at runtime but there is no guarantee an alert will be shown to the user.
C. Compilation fails.
D. The program hangs at line 22.
Answer: B

Oracle examen   certification 1Z0-869   1Z0-869   1Z0-869 examen

NO.19 Click the Exhibit button.
What is the result?
A. myForm contains the string "run count: 2".
B. An exception is thrown at runtime.
C. myForm contains the string "run count: 0".
D. myForm contains the string "run count: 1".
E. myForm contains the string "waiting...".
Answer: D

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NO.20 Which two are true about class file verification as defined by the CLDC specification? (Choose two.)
A. Verification is NOT required.
B. Verification can use a custom implementation.
C. Verification is completed at compile time and no further verification is necessary.
D. Verification can use the same implementation as defined in the JVM specification.
Answer: B,D

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NO.21 Which two are true about record stores? (Choose two.)
A. If two MIDlet suites each have a record store with the same name, then those suites CANNOT share
those identically named record stores.
B. A MIDlet CANNOT access a given record store using multiple simultaneous threads.
C. Record store names are case sensitive.
D. The API does NOT provide locking operations for record stores.
E. MIDlet suites that contain shared record stores are identified by using attributes from that suite's JAR
file.
Answer: C,D

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NO.22 Which two are true regarding error handling for classes that exist in both CLDC and J2SE? (Choose
two.)
A. The set of error classes is essentially the same in CLDC and J2SE.
B. The set of error classes is much reduced in CLDC to help reduce the overhead of the JVM.
C. If a class throws an error in CLDC, it should throw the same error as in J2SE or its nearest superclass.
D. There is no correspondence between the errors defined by CLDC and J2SE because the needs of
CLDC and J2SE are so different.
Answer: B,C

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NO.23 Given:
15. String addr = "sms://+14155557296";
16. MessageConnection conn
17. = (MessageConnection) Connector.open(addr);
18. // insert code here
19. message.setPayloadData(imageBytes);
Assume imageBytes is a valid byte array.
Which statement, inserted at line 18, causes the rest of the code fragment to compile correctly?
A. Message message = new BinaryMessage();
B. BinaryMessage message = (BinaryMessage)
conn.newMessage(MessageConnection.BINARY_MESSAGE);
C. Message message = conn.newMessage(MessageConnection.BINARY_MESSAGE);
D. BinaryMessage message = new BinaryMessage();
Answer: B

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NO.24 What is the minimum number of received SMS messages that a JTWI device must be able to
concatenate?
A. 5
B. 32
C. 10
D. 3
E. no minimum
Answer: D

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NO.25 Click the Exhibit button.
NewsMIDlet and CalendarMIDlet are in different MIDlet suites. Neither has any static push registrations.
Suppose NewsMIDlet registers dynamically for datagram push notifications on port 79.
What happens if a method CalendarMIDlet.init() attempts to open a UDPDatagramConnection on port
79?
A. init() succeeds without user confirmation, and removes NewsMIDlet's registration for datagram push
connections.
B. init() fails to open the connection.
C. init() succeeds only with user confirmation.
D. init() succeeds without user confirmation, and leaves untouched NewsMIDlet's registration for
datagram push connections.
Answer: B

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NO.26 Which is true for Item?
A. The same Command may occur on more than one Item.
B. The same Item may be appended to more than one Form at the same time.
C. When adding a Command to an Item, specifying a command type other than Command.ITEM results
in a compilation failure.
D. Minimum and preferred size CANNOT be changed once an Item is created.
Answer: A

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NO.27 Given:
21. TextField tf = new TextField("Memo", "", 50, TextField.ANY);
22. DateField df = new DateField("Date", DateField.DATE_TIME);
23. Form fm = new Form("Form demo");
24. Command cmCount = new Command("Word count", Command.ITEM, 1);
25. Command cmExit = new Command("Exit", Command.EXIT, 1);
26.
27. tf.addCommand(cmCount);
28. fm.append(df);
29. fm.append(tf);
30. fm.addCommand(cmExit);
31. fm.setCommandListener(this);
Which is true?
A. An exception is thrown at runtime.
B. The cmCount and cmExit commands is always available on fm, regardless of which Item is active.
C. Compilation fails.
D. The cmCount command is available only when tf is the active Item.
E. The cmExit command is available only when df is the active Item.
Answer: D

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NO.28 Which three are true.? (Choose three.)
A. A MIDlet suite consists of only one JAR file.
B. Different MIDlet suites can share data with each other.
C. A MIDlet suite can have more than one class that extends the MIDlet class.
D. A MIDlet suite is an array of MIDlet objects.
E. The names of MIDlet classes that belong to different MIDlet suites must be different.
Answer: A,B,C

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NO.29 How would a MIDlet that uses a GameCanvas efficiently update only a small region of the screen, from
the data in the off-screen buffer?
A. call flushGraphics(int, int, int, int) that specifies the region to be flushed
B. call serviceRepaints() and set a clip region on the Graphics object in paint()
C. Pixels that are NOT to be flushed should be made transparent.
D. write extra code to coalesce the flushGraphics() calls over many loops into one call
Answer: A

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NO.30 obscure is a content type unsupported on a device that executes:
10. String locator = "http://foobar.sun.com/content.obscure";
11. Player player = Manager.createPlayer(locator);
Which is true?
A. The file is interpreted as an HTML file.
B. An exception is thrown at runtime.
C. The file is interpreted as an ASCII file.
D. player is set to null.
Answer: B

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Selon les anciens test Oracle 1Z0-869, la Q&A offerte par Pass4Test est bien liée avec le test réel.