IBM C9510-401 시험

Question No : 1

A performance test team was testing the capacity of concurrent users of a web application deployed on a multi-processor server. While testing 250 concurrent users, the administrator discovers connections to the database are failing.
In response, a system administrator increased the connection pool to the maximum limit which the database allows and increased the prepared statement cache size. The test passed, but the application response time was slower.
How should the system administrator tune the data source properties to improve the application response time?

• A.Change connection pools purge policy.
• B.Decrease connection pool reap time.
• C.Decrease number of free pool partitions.
• D.Decrease the prepared statement cache size.

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정답:
Explanation:
The higher the statement cache, the more system resources are delayed. Therefore, if you set the number too high, you might lack resources because your system cannot open multiple prepared statements.
References: http://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/udat_jdbcdatasorprops.html

Question No : 2

A system administrator decides to use the advice from the Performance and Diagnostic Advisor to identify the optimum connection pool settings for data sources. In a cell, the data source db2datasource is defined under node scope and used by two servers from that node. The administrator receives two different sets of advice for db2datasource.
How should the administrator configure the data sources before reusing the Performance and Diagnostic Advisor?

• A.Create a data source of the same name under cell scope.
• B.Create a data source of the same name under server scope for each server.
• C.Increase the minimum connection pool size for the data source.
• D.Decrease the maximum connection pool size for the data source.

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정답:
Explanation:
References: https://www.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/cprf_rpa.html

Question No : 3

A system administrator has deployed web applications to a clustered environment where database session persistence is configured. The administrator needs to improve the response time and the throughput.
How can the system administrator do this?

• A.Disable server affinity.
• B.Configure dynamic caching.
• C.Configure a load balancer to spread work between existing web servers.
• D.Tune the database session persistence to optimize for failover.

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정답:
Explanation:
The dynamic cache service improves performance by caching the output of servlets, commands, and JavaServer Pages (JSP) files. WebSphere Application Server consolidates several caching activities, including servlets, web services, and WebSphere commands, into one service called the dynamic cache. These caching activities work together to improve application performance and share many configuration parameters that are set in an application server’s dynamic cache service.
References: WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile (July 2013), page 512

Question No : 4

A system administrator is required to create a star topology for multi-cell performance management for three WebSphere Application Server cells.
How should the administrator configure the Application Placement Controller (APC) in a star topology?
Configure the cell custom property CenterCell to:

• A.false in all three WebSphere Application Server cells.
• B.false in one WebSphere Application Server celltrue in the other two WebSphere Application Server cells.
• C.true in all three WebSphere Application Server cells.
• D.true in one WebSphere Application Server cellfalse in the other two WebSphere Application Server cells.

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Question No : 5

A system administrator is tasked with monitoring the overall health of the WebSphere environment to be able to tune the environment properly.
Specifically, the administrator was asked to:
Which PMI modules can the administrator examine to obtain this data?

• A.Number of requests, Java virtual memory, Average response time
• B.Number of requests, Average response time, Web server thread pools
• C.Average response time, Java virtual memory, Number of Live HTTP Sessions
• D.Average response time, Web server thread pools, Number of Live HTTP Sessions

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정답:
Explanation:
Monitoring overall system health. To monitor overall system health, monitor the following statistics at a minimum:
References: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/tprf_monitoringhealth.html

Question No : 6

Within a WebSphere Application Server Network Deployment cell, a system administrator needs to write a script to determine if a particular server is stopped. It is important that the wsadmin script explicitly return a status of stopped as opposed to just failing.
What wsadmin object should the administrator use to write this script?

• A.AdminApp
• B.AdminTask
• C.AdminConfig
• D.AdminControl

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정답:
Explanation:
Use the AdminControl object to invoke operational commands that manage objects for the application server.
Many of the AdminControl commands have multiple signatures so that they can either invoke in a raw mode using parameters that are specified by Java Management Extensions (JMX), or by using strings for parameters. In addition to operational commands, the AdminControl object supports some utility commands for tracing, reconnecting with a server, and converting data types.
References: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/rxml_admincontrol.html

Question No : 7

A system administrator wants to learn some of the Jython scripting commands for the administration of the environment.
Which product feature should the administrator use?

• A.The wsadmin.properties file to load a profile.
• B.The AdminTask object to generate wsadmin scripts.
• C.The guided activities panel from the Integrated Solutions Console (ISC).
• D.The “Log command assistance commands” option in the Integrated Solutions Console (ISC).

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Question No : 8

A system administrator has created a Jython script that will run in WebSphere Network cell where administrative security is enabled.
This script is named doUpdate.py and will be run by using the following:
wsadmin CconnType RMI Cf doUpdate.py
How can the administrator suppress a user/password prompt from appearing when this script is run?
Set the user and password in the:

• A.sas.client.props file.
• B.ssl.client.props file.
• C.soap.client.props file.
• D.wsadmin.properties file.

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정답:
Explanation:
The user Id and password needed for wsadmin to connect to a secured server can be supplied as command line options and in properties files. If used together, command line options take precedence over what is in the properties files. The properties files are located at Profile_root/properties.
If you use a Remote Method Invocation (RMI) connector or a JSR160RMI connector, set the following properties in the sas.client.props file with the appropriate values:
com.ibm.CORBA.loginUserid=
com.ibm.CORBA.loginPassword=
References: https://www.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/txml_security.html

Question No : 9

A system administrator discovers an issue that requires a change to a federated server. In this cell, WebSphere administrative security is enabled, but application security is not enabled.
How should the administrator make this change?
The administrator should use:

• A.a web browser to connect to the node agent https port.
• B.a web browser to connect to the deployment manager admin_host port.
• C.the job manager to submit a job to update the unmanaged server.
• D.an ssh connection to the node and modify the client_types.xml file.

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정답:
Explanation:
The admin_host virtual host is used for access to the WebSphere administrative console.
At installation time, the host is configured to match requests on the wc_adminhost and wc_adminhost_secure ports for the stand-alone server or deployment manager.
References: WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile (July 2013), page 303

Question No : 10

A system administrator has created a Jython script called globalScript.py.
What should the administrator do to ensure globalScript.py is loaded when the wsadmin shell is used?

• A.Compile globalScript.py to a Java class in the bin directory.
• B.Invoke wsadmin with the argument CprofileName globalScript.py.
• C.Modify the configureCustomProperty script to import globalScript.py.
• D.Set the script profiles in the wsadmin.properties file to load globalScript.py.

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정답:
Explanation:
wsadmin.properties has this entry com.ibm.ws.scripting.profiles where we can add the scripting files to be loaded.
References: https://www-01.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/rxml_propscript.html

Question No : 11

A system administrator runs a Jython script that creates and configures several servers and realize that the script fails before completing. Although many tasks succeeded, they are rolled back when the script fails.
Before running the script again, what can the administrator add to the script after each task so the completed tasks are committed even if other tasks fail?

• A.AdminApp.update()
• B.AdminConfig.save()
• C.AdminControl.invoke(server, ‘sync’)
• D.AdminTask.backupJobManager(‘server’)

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정답:
Explanation:
AdminConfig.save () to save changes after script execution.

Question No : 12

A system administrator has been asked to uninstall an application from a cluster running in a WebSphere Application Server Network Deployment cell. This application was installed from the Integrated Solutions Console (ISC). The monitored directory for the cluster is <cluster1_dir>.
What step(s) can the administrator perform to uninstall the application?

• A.Delete the application file from <cluster1_dir>.
• B.Stop the running cluster.Delete the application file from <cluster1_dir>.
• C.Stop the running cluster.Copy the application file to <cluster1_dir>.Delete the application file from <cluster1_dir>.
• D.Create a properties file to describe the deletion of the application file.Copy the properties file to <cluster1_dir>.

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정답:
Explanation:
You can use application properties files to install enterprise application files on a server or cluster, update deployed applications or modules, or uninstall deployed applications or modules. Drag or copy a properties file to a monitored directory and the product performs the deployment action described in the properties file. The enterprise application files that you can install, update, or uninstall using properties files include enterprise archive (EAR), web archive (WAR), Java archive (JAR), and Session Initiation Protocol (SIP) archive (SAR) files.
References: https://www.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.multiplatform.doc/ae/trun_app_install_dragdrop_prop.html

Question No : 13

A system administrator has created a wsadmin script with several steps to install and configure an application and some resources in a WebSphere Application Server process. The script executed but the application was not installed successfully. The administrator suspects that the script has problems.
How can the administrator test and debug the script?

• A.In WebSphere Application Server Developer Tools for Eclipse, right click on the script file and select Validate from context menu.
• B.Execute the script using the wsadmin with the option Cconntype NONE and monitor the commandAssistanceJythonCommands.log file.
• C.Use WebSphere Application Server Developer Tools for Eclipse in the debug perspective connected to the server and execute the script step by step.
• D.Run the script using wsadmin with these parameters: -lang jython Cjavaoption “-Xdebug” and then execute the logViewer command with the option -listInstances

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Question No : 14

A WebSphere system administrator needs to install the Installation Manager (IM) on an unmanaged node on a host named <machine2>. The deployment manager is running on a host named <machine1>.
What step must the administrator take before submitting a job from the Integrated Solutions Console (ISC) to install the IM on <machine2>?

• A.Install a node agent on <machine2>.
• B.Install the job manager on <machine1>.
• C.Start the job manager on <machine1>.
• D.Register <machine2> as a target for job manager.

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정답:
Explanation:
Submitting jobs to install Installation Manager on remote hosts
In a flexible management environment, you can submit the Install IBM Installation Manager job to install the Installation Manager on registered hosts of the job manager.
References: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.installation.zseries.doc/ae/tagt_jobmgr_install_im.html

Question No : 15

An EJB application posts a request message into a JMS destination and waits for a response message on a different JMS destination. To correlate the response message to the request message, the application uses the JMS correlationId of the message. The application waits up to five seconds for a response before timing out the request.
A Message Driven Bean (MDB) running on a different cluster is responsible for consuming the request message, process it and post a response message.
The destinations are defined in a Service Integration Bus (SIB) within the cell.
Intermittent timeout exceptions have occurred for the requester application.
How can a system administrator correlate and analyze the debug information from both requester and consumer applications?

• A.Enable High Performance Extensible Logging (HPEL).Use HPEL logViewer command to see debug information.
• B.Enable a diagnostic trace in both requester and consumer servers.Use the Integrated Solutions Console (ISC) to set the admin=all trace.Analyze the trace.
• C.Enable High Performance Extensible Logging (HPEL).Enable Cross Component Trace (XCT) to include request IDs in log and trace records.Use HPEL logViewer command with appropriate filters to see debug information.
• D.Using the Integrated Solutions Console (ISC), browse the request message that has timed out and look for any key application data.Search for exceptions using the key application data in both requester and consumer in native_stderr.log and native_stdout.log.

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정답:
Explanation:
Cross Component Trace (XCT) annotates the logs so that log entries that are related to a request that is serviced by more than one thread, process, or even server are identified as belonging to the same unit of work. XCT helps identify the root cause of problems across components.
References: WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile (July 2013), page 1091