IBM C9510-418 Online Practice Questions and Exam Preparation

IBM C9510-418 Online Questions & Answers

• Question 11:

  What does the 璂com.ibm.webshpere.alarmthreadmonitor.generate.javacore JVM argument do?

  A. Creates a javacore dump when a thread is hung
  B. Generates a Trace message that a javacore should be generated
  C. Generates a SystemOut message that a javacore should be generated
  D. Allows the administrator to choose whether or not to generate a javacore when a hang is detected
  A. Creates a javacore dump when a thread is hung

  ---

  If you want to monitor the activity of threads on which system alarms execute, add the following JVM generic arguments to the server settings.

  -Dcom.ibm.websphere.alarmthreadmonitor.generate.javacore

  Set to any value to cause a javacore dump to be created when an hung system alarm thread is detected. The threads section of the javacore dump can be analyzed to determine what the reported thread and other related threads are doing.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/ttrb_confighangdet.html

• Question 12:

  What is something an administrator needs to keep on mind regarding the relationship between an IBM WebSphere Application Server install and an IBM Installation Manager install?

  A. IBM Installation Manager should be used in GUI mode.
  B. IBM Installation Manager can be uninstalled and reinstalled without impacting WebSphere Application Server
  C. IBM Installation Manager repository information points to the install location of Websphere Application Server
  D. IBM Installation Manager can be used by either a user with administrator privileges or a regular user to administer the same installation
  B. IBM Installation Manager can be uninstalled and reinstalled without impacting WebSphere Application Server

• Question 13:

  In addition to logging changes, what can Cross Component Trace capture?

  A. The user agent of the browser that has initiated the request.
  B. The last time that the component was updated by a code deploy.
  C. The time that the component was started in the application server.
  D. Data snapshots that store entire request and response bodies on the file system.
  C. The time that the component was started in the application server.

  ---

  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 log records are typically added to the logs to:

  demarcate the beginning and ending of work for a particular request on a particular thread.

  demarcate when work is about to be transferred to another thread or process, or to indicate when work returned from another thread or process.

  demarcate when work moves from major component to major component, even if work continues on the same thread; for example to show transfer of control from application server code to application code.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/ctrb_XCTOverview.html

• Question 14:

  What does the following JVM argument do? -Xverbosegclog:${SERVER_LOG_ROOT}/verbose.m%d.7/18/16M%S.%pid.txt,20,10000

  A. It changes the default values for verbosegc logging.
  B. It changes the default location of the verbosegc logging.
  C. It configured verbosegc logging once it has already been enabled.
  D. It sets the default value for enabling and configuring verbosegc logging.
  B. It changes the default location of the verbosegc logging.

  ---

  -Xverbosegclog[: [,,]]

  Causes -verbose:gc output to be written to the specified file.

  If it cannot create the file (for example, if an invalid filename is passed into the command), it will redirect the output to stderr.

  If you specify and the -verbose:gc output is redirected to files, each containing GC cycles.

  The dump agent tokens can be used in the filename. See Dump agent tokens for more information. If you do not specify , verbosegc.%Y%m%d.%H%M%S.%pid.txt is used.

  example: -Xverbosegclog:newgclogname.log,7,10000

  Reference: http://www-01.ibm.com/support/docview.wss?uid=swg21384096

• Question 15:

  What data source property can an administrator configure to minimize the chances of encountering StaleConnectionExceptions?

  A. Minimum connections = 0
  B. Reap Timeout < Unused Timeout
  C. Purge Policy = FailingConnectionOnly
  D. Unused Timeout > Half firewall timeout
  A. Minimum connections = 0

  ---

  The configuration options below help minimize the chances of encountering StaleConnectionExceptions by helping to ensure that your WebSphere Application Server maintains control of database connections, specifically, the only one

  closing them, rather than other components in your network:

  The datasource MIN connections should be set to 0. By setting a MIN > 0, you are telling the application server that this number of connections will be valid for the life of the application server JVM. Unless you can guarantee the MIN number

  of connections will never be timed out or dropped, setting a MIN will cause a StaleConnectionException when the connection becomes invalid.

  Reference: https://www.ibm.com/developerworks/community/blogs/aimsupport/entry/websphere_application_server_staleconnectionexceptions?lang=en

• Question 16:

  How would an administrator analyze Cross Component Trace output?

  A. Use the logViewer command to review the information.
  B. Review the SystemErr.log files to review the information.
  C. Use the Integrated Solutions Console to review the information.
  D. Use the included Cross Component Trace servlet to review the information.
  A. Use the logViewer command to review the information.

  ---

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.multiplatform.doc/ae/ctrb_XCTOverview.html

• Question 17:

  Heapdumps, javacores, and system cores are recommended to be generated for which kind of IBM WebSphere Application Server problems?

  A. Slow page rendering
  B. High CPU and disk I/O
  C. Slow File uploads and downloads
  D. System hangs and out of memory
  B. High CPU and disk I/O

  ---

  Reference: https://www-01.ibm.com/support/docview.wss?uid=swg21138203

• Question 18:

  An administrator installs IBM WebSphere Application Server and an HTTP server, but when configuring the environment, the administrator finds that the WebSphere Plug-in is missing. Which tool can be used to fix this issue?

  A. Customization Tool Box
  B. IBM Installation Manager
  C. Profile Management Tool
  D. Integrated Solutions Console
  D. Integrated Solutions Console

  ---

  In the WebSphere Integrated Solutions Console, the web server is represented as a specific server type, and you can view or modify all of the configuration properties used in the plugin-cfg.xml file for the web server plug-in from the WebSphere Integrated Solutions Console.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSHRKX_8.0.0/plan/plan_ihs.html

• Question 19:

  An administrator configured Web authentication for a Web module deployed in an application server to protect the URL. After this configuration, application users could not load images that are protected on the web page. In addition to configuring com.ibm.wsspi.security.web.webAuthReq as a JVM custom property, which two property values can an administrator set to resolve the problem? (Choose two.)

  A. lazy
  B. eager
  C. always
  D. transient
  E. persisting
  D. transient
  E. persisting

• Question 20:

  Which is true when an administrator properly updates a single file within an application?

  A. The administrator can use a partial application update.
  B. The administrator must redeploy the full application file.
  C. The administrator can manually update the file on the file system.
  D. The administrator must uninstall the application, and then, reinstall with the updated application file.
  C. The administrator can manually update the file on the file system.