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Oracle WebLogic Server 12c Essentials

Question No: 21

A customer wants to improve the availability of a web application and provide more predictable scalability when scaling out the application.

Which Feature of WebLogic should you recommend to help solve this problem?

  1. Oracle Web Grid

  2. ActiveCache

  3. Coherence Grid Edition

  4. WebLogic Session Replication

  5. Coherence Web Edition

Answer: E

Explanation: * Built on top of Oracle Coherence (Coherence), Coherence*Web:

/ brings Coherence data grid#39;s data scalability, availability, reliability, and performance to in- memory session management and storage.

/ can be deployed to many mainstream application servers such as Oracle GlassFish Server, Oracle WebLogic Server, IBM WebSphere, Tomcat, and so on

* Coherence*Web enables HTTP session sharing and management across different Web applications, domains, and heterogeneous application servers. Session data can be stored in data caches outside of the application server, thus freeing application server heap space and enabling server restarts without losing session data.

Reference: Oracle Coherence User#39;s Guide for Oracle Coherence*Web

Question No: 22

You deployed a Java EE Shared Library and want to use it from an application that is also deployed on the same cluster.

Which two manifest attributes must be specified at a minimum with corresponding values in the deployment descriptor of the application that requires

  1. Implementation-Version

  2. Specification-Version

  3. Extension-Name

  4. Specification-Vendor

  5. Implementation-Vendor

Answer: A,C

Explanation: When an application that references a shared library or package is deployed, WebLogic Server checks the names and version string requirements against the libraries registered with the server. If an exact match for a library or package name is not found, or if the version requirements are not met, the application deployment fails.

If WebLogic Server finds a name and version string match for all of the libraries referenced in the application, the server adds the libraries#39; classes to the classpath of the referencing application and merges deployment descriptors from both the application and libraries in memory. The resulting deployed application appears as if the referenced libraries were bundled with the application itself.

Note:

As a best practice, your development team should always include version string information for a library or optional package in the manifest file for the deployment. See Editing Manifest Entries for Shared Libraries in Developing Applications for Oracle WebLogic Server for more information.

If you are deploying a library or package that does not include version string information,

you can specify it at the command line using one or both of the following options: libspecver-Defines a specification version for the library or package. libimplver-Specifies an implementation version for the library or package.

Reference: Deploying Applications to Oracle WebLogic Server, Deploying Shared Java EE

Libraries and Dependent Applications

Question No: 23

Which two IDEs are supported development environments for WebLogic Server 12c in version 12.1.1?

  1. Websphere Developer Studio

  2. NetBeans

  3. InteliJ IDIA

  4. JDeveloper

  5. Eclipse

  6. WebLogic Workshop

Answer: B,E

Explanation: E: Oracle Enterprise Pack for Eclipse 12c (12.1.1.2.1) Eclipse Based Enterprise Application Development

Oracle Enterprise Pack for Eclipse (OEPE) 12.1.1.2.1 for Eclipse Juno provides tools that make it easier to develop applications utilizing specific Oracle Fusion Middleware technologies and Oracle Database.

Note:

  • Support for IDE’s. WebLogic already supported JDeveloper 11.1.1.5, but will come out with the 11.1.1.6 later on. Also suported are Eclipse and NetBeans 7.1 IDE. The JDeveloper 11.1.1.6 and IntelliJIdea IDE will be supported in a later timeframe.

    Question No: 24

    Which four steps are involved to use Active Cache Dependency Injection in a WebLogic Java EE application?

    1. Deploy Active Cache shared library

    2. Declare dependency on the shared library

    3. Declare all dependency injection entries

    4. Package tangosol-coherence-override.xml in modules classpath

    5. Package coherence-cache-config.xml in modules classpath

    Answer: A,B,C,E Explanation: Note:

  • Example

If you have additional Coherence caches running on Coherence*Web, then you must merge the cache configuration information (typically defined in the coherence-cache- config.xml file) with the session configuration contained in the session-cache-

config.xml file. The cache and session configuration must be consistent across WebLogic Server and Coherence cache servers.

Question No: 25

Identify the three processes that customers can choose for patching WebLogic Server.

  1. Download patches from My Oracle Support and manage them using Smart Update.

  2. Use Enterprise Manager to download patches from My Oracle Support and apply patches to WebLogic.

  3. Download patches from My Oracle Support and manually modify the classpath of the application server (though it is not recommended).

  4. Download patches from My Oracle Support and apply them using the WebLogic Admin Console.

  5. Use the Admin Console to connect to My Oracle Support and download patches and then target them to the domain.

Answer: A,B,C

Explanation: A: Oracle Smart Update is a standalone Java application that is automatically installed in the Middleware home utils/bsu directory. Smart Update simplifies the process of applying patches to your WebLogic Server installation. When support makes a patch available for an installed version of WebLogic Server, you download the patch from My Oracle Support and then use Oracle Smart Update to apply it to your installation. Smart Update organizes all available updates for you, and has several features that allow a great deal of customizing in the way various patches are applied and managed in your environment.

B: As part of a new Enterprise Manager system, the installation wizard does the following:

* Oracle My Oracle Support Management Plug-In etc.

C: Applying patch from server start script:

After downloading the patch (jar file) follow the below steps:

  • Stop your server.

  • Then take the path of the folder which has the CRxxxxxx_xxxmpx.jar file and copy it in the CLASSPATH of setDomainEnv.cmd which is in

(lt;bea homegt;/user_projects/domains/lt;your domain namegt;/bin/setDomainEnv.cmd) For example, the script would look something like this:

set CLASSPATH=%PRE_CLASSPATH%;%WEBLOGIC_CLASSPATH%;

C:\extra\my_projects\doc\CR\CR218639_920mp3.jar;C:\extra\my_projects\doc \CR\ CR360676_920mp3.jar;C:\extra\my_projects\doc\CR\CR367966_920mp3.jar; C:\extra\my_projects\doc\CR\CR368155_920mp3.jar;C:\extra\my_projects\doc\CR\CR3703 11_920mp3.jar

  • Re-start your server.

  • You should see the patch applied in the stdout file.

Question No: 26

Oracle Coherence is best classified as ?

  1. A Database Product

  2. A Middleware Product

  3. An Object Relational Mapping (ORM) Tool

  4. A Soft Load Balancer

  5. An Application Product

Answer: B

Explanation: Oracle Coherence 3.6 is a component of Oracle Fusion Middleware 11g.

Question No: 27

Identify three unique integration features of Spring and WebLogic Server.

  1. ability to automatically convert Spring application to JavaEE 6 framework

  2. ability to export the WebLogic Container feature to another Spring enabled JavaEE server.

  3. ability to extend the WebLogic Server console with some Spring-related pages

  4. official support of Spring apps inside WebLogic by Oracle Support

  5. support for injection of WebLogic MBeans and Resources into Spring applications

Answer: C,D,E

Explanation: C: Spring Console Extension. WebLogic provides an Admin Console extension for Spring to provide administrators with visual tools for monitoring the Spring parts of deployed applications (first navigate to WebLogic Admin Console#39;s Preferences | Extension menu option and and enable spring-console). This Spring console extension is basically a set of pages which are added amongst the normal pages of the standard WebLogic admin console, rather than being a separate console per se. The extension provides a view onto the values of the WebLogic generated Spring MBeans

D: If you have an issue, you use the Oracle Support organisation for help with WebLogic specific problems and any Spring parts to your application are treated just like your own custom code is, from an Oracle Support perspective.

E: WebLogic Injected Spring Beans is a Weblogic feature that is enabled by default.

Reference: WebLogic and Spring

Question No: 28

Which feature is enabled when you start a WebLogic server with the -DserverType=wlx option?

  1. JDBC

  2. JCA

  3. JMS

  4. EJB

  5. Java EE

Answer: A

Explanation: -DserverType={quot;wlsquot; | quot;wlxquot;}

Specifies the Server Type, which determines the set of services that are started in the server runtime.

The default is quot;wlsquot;, which starts all WebLogic Server services, including EJB, JMS, Connector, Clustering, Deployment, and Management.

The quot;wlxquot; option starts a server instance that excludes the following services, making for a lighter weight runtime footprint:

  • (not D) Enterprise JavaBeans (EJB)

  • (not B, not E) Java EE Connecter Architecture (JCA)

  • (not C) Java Message Service (JMS)

    Reference: Oracle Fusion Middleware Command Reference for Oracle WebLogic Server , Options for Configuring Deployment Attributes

    Question No: 29

    You want to migrate an application that was developed for OAS/OC4J to WebLogic. The application uses Oracle Streams Advanced Queuing (AQ). You configured a Foreign JMS Server and Data Source but you are not able to send messages to the AQ destination and see them reach the database. Which two things are missing in this configuration?

    1. nothing, there may be a network connection issue

    2. a Foreign JMS Connection Factory

    3. a JMS Bridge to map the JNDI of the Local JMS Destination to the remote AQ destination

    4. a mapping of the Foreign JMS Connection Factory to the Data Source where AQ is configured and installed.

    5. Oracle AQ Java EE Shared Libraries not deployed and referenced by your application

    Answer: C,E Explanation: C:

  • A WebLogic Messaging Bridge communicates with the configured source and target bridge destinations. For each mapping of a source destination to a target destination, you must configure a messaging bridge instance. Each messaging bridge instance defines the source and target destination for the mapping, a message filtering selector, a QOS, transaction semantics, and various reconnection parameters.

    Note:

  • In your JMS Foreign Server configuration:

/ Specify oracle.jms.AQjmsInitialContextFactory as the JNDI Initial Context Factory.

/ Configure the JDBC data sources needed for your application environment.

Question No: 30

What is the name of the WebLogic specific deployment descriptor of Java Enterprise Application?

  1. application.xml

  2. weblogic.xml

  3. web.xml

  4. weblogic-application.xml

  5. config.xml

Answer: D

Explanation: The WebLogic Server-specific deployment descriptor weblogic.xml.

If your Web application does not contain a weblogic.xml deployment descriptor, WebLogic Server automatically selects the default values of the deployment descriptor elements.

Note:

A Web archive (WAR file) contains the files that make up a Web application. A WAR file is deployed as a unit on one or more WebLogic Server instances. A WAR file deployed to WebLogic Server always includes the following files:

  • One servlet or Java Server Page (JSP), along with any helper classes.

  • An optional web.xml deployment descriptor, which is a Java EE standard XML document that describes the contents of a WAR file.

  • A weblogic.xml deployment descriptor, which is an XML document containing WebLogic Server-specific elements for Web applications.

  • A WAR file can also include HTML or XML pages and supporting files such as image and multimedia files.

Reference: weblogic.xml Deployment Descriptor Elements

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