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Oracle WebLogic Server 11g: System Administration

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QUESTION 1

Which two statements are true about cluster configuration?

A. A server must be running before it can be added to a cluster.

B. You cannot define cluster membership through the Configuration Wizard.

C. The console allows you to add new and existing servers to a cluster.

D. The console allows you to add an administration server to a cluster.

E. You cannot remove a server that is running from a cluster.

Correct Answer: CE

o assign server instances to a cluster:

C: T

1.

If you have not already done so, in the Change Center of the Administration Console, click Lock and Edit .

2.

In the left pane of the Console, expand Environment and

select Clusters.

3.

Select the cluster to which you want to assign servers.

4.

Select Servers and click Add.

5.

To add an existing server to a cluster:

a.

Select the Select an existing server and add it

as a member of this cluster option.

b.

Select a server from the drop-down list.

Note: You cannot change the cluster of the Administation Server using the Administration Console. You cannot changethe cluster or machine of a running server.






c.

Click Finish.

6. To create a new server as part of a cluster:

a.

Select the Create a new server and add it to

this cluster option.

b.

Click Next.

c.

Provide the following information:

Server Name Server Listen Address Server Listen Port

d. Click Finish.

The new server appears in the list of servers and is added as a member of the current cluster.

7. To activate these changes, in the Change Center of the

Administration Console, click Activate Changes.

Incorrect answer:

Not A. See screenshot below.






Reference: edocs Home > Oracle WebLogic Server Documentation > Administration Console Online Help > Assignservers to clusters

QUESTION 2

Refer to the Exhibit






What is the meaning of the yellow triangle icon next to Listen Address?

A. This attribute has no value.

B. The server must be running to change this attribute.

C. The server must be shut down to change this attribute.

D. The server must be restarted for a change to this attribute to take effect.

E. This attribute is read only and cannot be changed in the administration console

Correct Answer: D

The server instance for which you configure the listen address does not need to be running. If it is running, you mustrestart it after you complete these steps. Reference: Administration Console Online Help, Configuring the ListenAddress from the Administration Console

QUESTION 3

Indentify two requirements for in-memory session replication.

A. Clusters must contain an even number of members.






B. Web applications must be configured to use replication.

C. Web applications must be deployed as an archive file.

D. Cluster members must be started by using the Node Manager.

E. Web applications must be accessed via a proxy that supports session cookies

Correct Answer: BE

B: When in-memory replication is enabled for a web application, WebLogic Server copies session state from one serverin the cluster (primary) to one other server in the same cluster (secondary). The replica on the secondary server is keptup-to-date so that it may be used if the primary server fails.

E: To utilize in-memory replication for HTTP session states, you must access the WebLogic Server cluster using either acollection of Web servers with identically configured WebLogic proxy plug-ins, or load balancing hardware. If youchoose to use load balancing hardware instead of a proxy plug-in, it must support a compatible passive or active cookiepersistence mechanism, and SSL persistence.

Note 1: In its default configuration, WebLogic Server uses client-side cookies to keep track of the primary andsecondary server that host the client\\'s servlet session state. If client browsers have disabled cookie usage, WebLogicServer can also keep track of primary and secondary servers using URL rewriting. With URL rewriting, both locations ofthe client session state are embedded into the URLs passed between the client and proxy server. To support thisfeature, you must ensure that URL rewriting is enabled on the WebLogic Server cluster.

Note 2: To support automatic failover for servlet and JSP HTTP session states, WebLogic Server replicates the sessionstate in memory. WebLogic Server creates a primary session state on the server to which the client first connects, and asecondary replica on another WebLogic Server instance in the cluster. The replica is kept up-to-date so that it may beused if the server that hosts the servlet fails. The process of copying a session state from one server instance to anotheris called in-memory replication.

Reference: eDocs Home > BEA WebLogic Server 8.1 Documentation > Using WebLogic Server Clusters > Failover andReplication in a Cluster, Failover and Replication in a Cluster

QUESTION 4

Refer to the Exhibit.

You use the Start button in the administration console to start managed2 successfully. Which two statements must betrue?

A. Managad2 is part of a cluster.






B. The Administration Server is running.

C. Managed2 has applications deployed to it.

D. The Node Manager for machine2 is configured and running.

E. The Node Manager for the Administration Server machine is configured and running.

Correct Answer: BD

B: The administration server must be running.

Note: A WebLogic Server administration domain is a logically related group of WebLogic Server resources. Domainsinclude a special WebLogic Server instance called the Administration Server, which is the central point from which you

configure and manage all resources in the domain.

D:

Node Manager is a WebLogic Server utility that enables you to start, shut down, and restart Administration Server andManaged Server instances from a remote location. Although Node Manager is optional, it is recommended if your

WebLogic Server environment hosts applications with high availability requirements. A Node Manager process is notassociated with a specific WebLogic domain but with a machine. You can use the same Node Manager process tocontrol

server instances in any WebLogic Server domain, as long as the server instances reside on the same machine as theNode Manager process. Node Manager must run on each computer that hosts WebLogic Server instances -- whether

Administration Server or Managed Server -- that you want to control with Node Manager.

Incorrect answers:

A: We could not know if Managed2 is in a cluster or not.

C: We could not know if Managed2 has deployed applications.

QUESTION 5

Identify four attributes of a JDBC data source.

A. URL

B. Targets

C. JNDI Name

D. Delivery Mode

E. Database Driver

F. Server Log

Correct Answer: ABCE






A: When creating a JDBC data source using the Administration Console, you are prompted to select a JDBC driver. TheAdministration Console provides the driver class name and helps you construct the URL as required by the driver.

B: JDBC Data Source: Targets. Use this page to select the servers or clusters on which you would like to deploy thisJDBC data source.

C: JNDI Name, The JNDI path to where this data source is bound. By default, the JNDI name is the name of the datasource.

E: When deciding which JDBC driver to use to connect to a database, you should try drivers from various vendors inyour environment. In general, JDBC driver performance is dependent on many factors, especially the SQL code used inapplications and the JDBC driver implementation.

Reference: Configuring and Managing WebLogic JDBC, Understanding JDBC Data Sources

QUESTION 6

You have opened a terminal window (or a Window command prompt) to run a WLST script named weeklydeployer.py.You enter the following command:

Java weblogic.WLST weeklydeployer.py

Instead of the WLST initializing and the script running, however, you receive the NoClassDefFoundError java exceptionfor weblogic/WLST.

What is the problem?

A. You forgot to set PATH to include the java executable.

B. There is an error in the code of the script.

C. You forgot to set CLASSPATH to include weblogic.jar.

D. You are not in the directory where weeklydeployer.py resides.

E. You should have omitted the ".py" in the file name; it is assumed by WLST.

F. You forgot to set PATH to include the WLST executable.

Correct Answer: C

To set up your environment for WLST:

1.

Install and configure the WebLogic Server software

2.

Add WebLogic Server classes to the CLASSPATH environment variable

Note: Although the process should be able to build the correct classpath by default, you might hit this issue in somecases. To overcome the problem, you must explicitly set the classpath in the admin console accordingly. Reference:WebLogic Scripting Tool, Using the WebLogic Scripting Tool






QUESTION 7

Indentify three tools that you can use to create a deployment plan.

A. administration console

B. weblogic.PlanGenerator

C. the /autodeploy folder that is locked in the domain directory

D. developer tools such as JDeveloper or Eclipse

E. the /plan subfolder that resides outside the application archive

Correct Answer: ABD

A: To create a deployment plan for a deployed application that does not already have a deployment plan, make aconfiguration change to the deployed application. When you make a persisted configuration change to a deployedapplication that does not have an existing deployment plan, the Administration Console automatically creates adeployment plan for you and prompts you for the location in which to save it.

B: The weblogic.PlanGenerator is a Java-based deployment configuration tool. It is primarily intended for developerswho want to export portions of a WebLogic Server deployment configuration into an XML deployment plan.weblogic.PlanGenerator also enables you to generate a basic WebLogic Server configuration for applications that haveonly J2EE deployment descriptors.

D: Deployment plans can be created or edited through the deployment plan editor functionality available through theWeb-based Oracle Enterprise Manager 10g Application Server Control Console interface and the J2EE and StudioEditions of the Oracle JDeveloper 10g integrated development environment.

Reference: Administration Console Online Help, Create a deployment plan Reference: weblogic.PlanGeneratorCommand Line Reference

QUESTION 8

Which two statements are true about Log Filters?

A. Log Filters are created at the domain level.

B. You do not have to lock the configuration to create Log Filters.

C. You can apply a Log Filter to the server log, but not to standard out.

D. The administration console assists in the creation of Log Filter expressions

Correct Answer: AD

A (not B): For any given WebLogic Server instance, you can override the default filter and create a log filter that causesa different set of messages to be written to the domain log file.

Note:

To create and configure a log filter:






1.

If you have not already done so, in the Change Center of the Administration Console, click Lock and Edit (not B) (seeUse the Change Center).

2.

In the left pane of the Console, select the name of the active domain in the Domain Structure panel.

3.

On the Configuration: Log Filters page, click New.

4.

On the Create a New Log Filter page, enter a value to identify the filter in the Name field.

5.

Click Finish.

The new log filter appears in the Log Filters table.

6.

To configure a filter expression, in the Log Filters table, click the log filter name.

7.

On the Configuration page, in the Filter Expression text box, enter criteria for qualifying messages.

A filter expression defines simple filtering rules to limit the volume of log messages written to a particular logdestination.

See D) below.

8.

Click Save.

The filter and filter expression are listed in the Log Filters table.

D: Log Filter Configuration

Use this page to define a custom log filter to restrict the set of messages that one or more servers send to a messagedestination, such as the domain log, standard out, server log file, or memory buffer of recent log events.

You can click Edit to type or paste in an expression directly, using WLDF Query Language syntax (see Related Topics,below); or you can click Add Expression to construct an expression by choosing items from lists.

Once you create a filter, you cannot change its name. Instead, you must create a new filter under a different name.

Reference: Administration Console Online Help, Log Filter Configuration Reference: Administration Console OnlineHelp, Create log filters






QUESTION 9

You are logged in to the administration console for a domain that is running in Development Mode. The domainconfiguration, you select Production Mode, Save, and then Activate Changes. Which two statements are true?

A. All running servers must be restarted.

B. Only the Administration Server must be restarted.

C. Auto-deployment will no longer be available for this domain.

D. This change may be made only through the Administration Server\\'s secure port.

E. If you decide to go back to Development Mode, uncheck Production Mode in the administrate console.

Correct Answer: AC

C: auto deployment is not allowed in production mode only development mode.

Note 1:

All servers in a domain run either in development mode or production mode. To configure all servers in a domain to runin production mode:

1.

If you have not already done so, in the Change Center of the Administration Console, click Lock and Edit .

In the left pane of the Console, under Domain Structure, select the domain name.

2.

Select Configuration > General and select the Production Mode check box.

3.

Click Save, and then, to activate these changes, in the Change Center, click Activate Changes.

4.

Shut down any servers that are currently running.

5.

Invoke the domain\\'s startWebLogic script.

The Administration Server starts in the new mode.

6.

If the domain contains Managed Servers, start the Managed Servers.

Result

As each Managed Server starts, it refers to the mode of the Administration Server to determine its runtime mode.

Note 2: Once you have changed to production mode, whether by using a start command argument, the Console, or






WLST, you cannot change back to development mode without restarting the server.

By default auto deployment is turned off in Production Mode (however it can be later turned on). Incorrect:

E: if you want to go back to development mode you must change the config.xml file and restart the admin server. Thewindow shown below shows from developemnt to production NOT production to development is allowed. This is indevelopment mode and you can change to production mode but in production mode this attribute states the word true.

Reference: Administration Console Online Help, Change to production mode

QUESTION 10

A managed server, myserver1, has a boot.properties file in the security directory. It was started with thestartManageWeblogic.sh script(.cmd in windows) and his boot.properties file was used for its startup credentials.

You just used the administration console to change all administrator passwords. To continue using boot.properties, whatcan you do?

A. This is not possible. A boot.properties file can be used only with the Administration Server.

B. Delete boot.properties. In the administration console, under the myserver configuration, select Generate Boot Identityfile.

C. You need not do anything- The password in boot .properties was automatically updated by administration consolewhen you changed the password.

D. Edit boot.propetties. Type over the encrypted password with the new password in clear text. The next time myserver1is started, it will encrypt the password in the file.

E. Delete boot .properties. Use the WLST encrypt () command to create a new boot.properties file containing the newpassword. Copy that file into the security directory of myserver1






Correct Answer: D

If you install the WebLogic Server Examples component, the default user weblogic is created that has permission tostart and stop WebLogic Server. The default password is welcome1. If you change the password of the weblogic user,WebLogic Server does not automatically update this password in the boot.properties file, which is located in theDOMAIN_NAME/servers/AdminServer/security directory.

If you change the password for user weblogic, you can use either of the following workarounds so that you can continueto boot a WebLogic Server instance via that username and its new password:

*

Remove the boot.properties file. Subsequently each time you start WebLogic Server, you are prompted for theusername and password. The changed password for the weblogic user will be accepted.

*

Modify the existing boot.properties file, changing the username and password as follows:

username=weblogic password=welcome1 Subsequently during the server startup process, the boot.properties file isencrypted again.

Reference: Oracle Fusion Middleware Oracle WebLogic Server Administration Console Online Help 11g Release 1,Limitation Regarding User weblogic http://docs.oracle.com/cd/E15523_01/web.1111/e13708/overview.htm

QUESTION 11

You have made several changes to variable attributes on a managed server within a domain. You first locked theconsole, made some nondynamic changes, made some dynamic changes as well, and then activated your changes.Which statement is true?

A. All the changes that you made on the server will take effect immediately.

B. The dynamic changes that you made will take effect immediately and the changes that are nondynamic will takeeffect after the server is restarted.

C. The changes that you made on the server will not take effect until you restart the server.

D. You will receive an error because you cannot make dynamic and nondynamic changes to a server at the same time.

Correct Answer: C

If a change is made to a non-dynamic configuration setting, no changes to dynamic configuration settings will take effectuntil after restart. This is to assure that a batch of updates having a combination of dynamic and non-dynamic attributeedits will not be partially activated.

Note: Some changes you make in the Administration Console take place immediately when you activate them. Otherchanges require you to restart the server or module affected by the change. These latter changes are called non-dynamic changes.

Changes to dynamic configuration attributes become available once they are activated, without restarting the affectedserver or system restart. These changes are made available to the server and runtime hierarchies once they areactivated. Changes to non-dynamic configuration attributes require that the affected servers or system resources berestarted before they become effective.






Reference: Overview of the Administration Console, Dynamic and Non-Dynamic Changes

QUESTION 12

Which statement is true about the java Node Manager?

A. It runs on Windows not on Linux

B. In its secure form, it uses one-way SSL.

C. It does not use the nodemanager.domains file, whereas the script-based Node Manager.

D. Unlike the script based Node Manager, it should not be run as an operating system service

Correct Answer: B

Node Manager security relies on a one-way SSL connection between the client and server.

Reference: Oracle Fusion Middleware Oracle WebLogic Server Administration Console Online Help 11g Release 1,Configuring Java-based Node Manager Security http://docs.oracle.com/cd/E21764_01/web.1111/e13740/java_nodemgr.htm#i1068397

QUESTION 13

Identify the server attributes that you must configure to communicate with the server via HTTPS.

A. SSL Listen Address

B. SSL listen Port

C. SSL Listen Port Enabled

D. Production Mode Enabled

E. Startup Mode

Correct Answer: B

Enabling SSL under WLS 10.3

See step 6) below.

Steps to configure WLS for SSL:

1) Open the WLS console

2) Select from the Domain Structure -> (your domain) -> Environment -> Servers

3) Select the server from the Summary of Servers page you wish to configure for SSL.

4) Under the Settings for (server name) page, select the Configuration tab, then General tab (the defaults).

5) If WLS is running in production mode, select the Lock and Edit button.






6) Select the SSL Listen Port Enabled checkbox, and enter your preferred port in the SSL Listen Port.

7) Press the Save button.

8) If WLS is running in production mode, select the Release Configuration button.

Reference: Enabling SSL and disabling non-SSL under WLS 10.3

QUESTION 14

Identify two methods for utilizing WebLogic Server\\'s production redeployment feature.

A. Specify a version identifier when deploying the application.

B. Include a version identifier in the application\\'s manifest file.

C. Provide a version identifier when running the Plan Generator tool.

D. Include a unique context root in the application\\'s descriptor files.

Correct Answer: AB

A: If you are testing the production redeployment feature, or you want to use production redeployment with anapplication that does not include a version string in the manifest file, specify a unique version string by using the-appversion option when deploying or redeploying an application

B: To assign a version identifier to an application, BEA recommends that you store a unique version string directly in theMANIFEST.MF file of the EAR or WAR being deployed.

Reference: Redeploying Applications in a Production Environment, Specifying an application version identifierhttp://docs.oracle.com/cd/E11035_01/wls100/deployment/redeploy.html#wp1020276

QUESTION 15

Consider the following excerpt from mod_wl_ohs.conf:

WebLogicCluster 192.168.13.1:7001, 192.168.13.2:7001,192.168.13.2:7001

SetHandler weblogic-handler

Assuming that this is a valid is a valid configuration, which two conclusions can you make?

A. A web application name "welcome" is configured to use session replication.

B. A web application that uses the paths "welcome" is targeted to the cluster.






C. The proxy server will ignore any requests that contain the name "welcome."

D. The proxy server is listening on the host name "welcome."

E. A cluster exists that consists of at least two managed servers.

F. All cluster members are running on the same machine.

Correct Answer: BE

B: To proxy requests by path, use the Location block and the SetHandler statement. When to use

Use to apply directives to content that lives outside the filesystem. For content that lives in the filesystem, use and . Anexception is , which is an easy way to apply a configuration to the entire server.

For all origin (non-proxy) requests, the URL to be matched is a URL-path of the form /path/. No scheme, hostname,port, or query string may be included. For proxy requests, the URL to be matched is of the formscheme://servername/path, and you must include the prefix.

E: Add an IfModule block that defines one of the following:

For a non-clustered WebLogic Server instance:

The WebLogicHost and WebLogicPort parameters.

For a cluster of WebLogic Servers instances:

The WebLogicCluster parameter.

If you are proxying requests by MIME type to a cluster of WebLogic Servers, use the WebLogicCluster parameter.

For example:

WebLogicCluster

w1s1.com:7001,w1s2.com:7001,w1s3.com:7001

Note #1: The ... section is used to mark directives that are conditional on the presence of a specific module. Thedirectives within an section are only processed if the test is true. If test is false, everything

between the start and end markers is ignored.

The test in the section directive can be one of two forms:

module name

!module name

Note #2:

Directive

Description: Applies the enclosed directives only to matching URLs Syntax: ... Context: server config, virtual host






Status: Core

Module: core

The directive limits the scope of the enclosed directives by URL. It is similar to the directive, and starts a subsectionwhich is terminated with a directive. sections are processed in the order they

appear in the configuration file, after the sections and .htaccess files are read, and after the sections.

sections operate completely outside the filesystem. This has several consequences. Most importantly, directives shouldnot be used to control access to filesystem locations. Since several different URLs may map to

the same filesystem location, such access controls may by circumvented. Reference: eDocs Home > BEA WebLogicServer 8.1 Documentation > Using Web Server Plug- Ins with WebLogic Server > Installing and Configuring the Apache

HTTP Server Plug-In

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