IBM IBM Certifications C9510-418 Questions & Answers

• Question 81:

  What are two differences between dynamic clusters and static clusters? (Choose two.)

  A. Dynamic Workload Management is enabled by default in dynamic clusters.

  B. The application placement controller can start and stop a dynamic cluster that is in automatic mode only.

  C. Using the autonomic request flow manager (ARFM) in manual mode will not affect dynamic cluster mode.

  D. Using static clusters in an Intelligent Management enabled environment will acquire some of a dynamic cluster features.

  E. When creating a static cluster using an application server template, any changes made to the template after creating the instances do not change the instances.

  Correct Answer: AE

  A: The dynamic workload manager is enabled by default and assigns weights to the application server instances.

  E: When you define a static cluster, you can select an application server template on which to base all the application server instances that you create. However, any changes that you make to the template after creating the instances do not change the instances.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_9.0.5/ com.ibm.websphere.nd.multiplatform.doc/ae/cwve_xdovrvw.html

• Question 82:

  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.

  Correct Answer: B

  -Xverbosegclog[: [file] [,,]]

  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 [file], 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 83:

  What must be modified to configure the authentication settings for IIOP requests?

  A. Bus security settings

  B. J2C authentication settings

  C. Session Initiation Protocol (SIP) authentication settings

  D. Common Secure Interoperability Version 2 (CSIV2) settings

  Correct Answer: D

  Application Server can propagate attributes directly as part of the CSIv2 protocol for RMI/IIOP requests.

  Reference: https://www.ibm.com/developerworks/websphere/ techjournal/0508_benantar/0508_benantar.html

• Question 84:

  An administrator noticed that one of the servers in the core group is experiencing OutOfMemory. As a result, other servers in the core group failed to start.

  What core group custom property should the administrator tune to prevent the affected server from impacting other servers in the core group?

  A. IBM_CS_OOM_ACTION

  B. IBM_CS_DATASTACK_MEG

  C. IBM_CS_WIRE_FORMAT_VERSION

  D. IBM_CS_HAM_PROTOCOL_VERSION

  Correct Answer: A

  Use this custom property to explicitly enable exception handlers that are specific for OutOfMemoryExceptions that occur when sending or receiving network messages. When this property is set to Isolate, if an OutOfMemoryException occurs when a network message is being sent or received, these exception handlers stop High Availability Manager communications to the Out of Memory process.

  If IBM_CS_OOM_ACTION=Isolate is not added to the configuration settings for a core group, if a core group process runs out of memory, the Out of memory process might not be able to respond to all messages. This situation prevents multi- step protocols from completing, and prevents the starting server from receiving its initial view of the distributed state.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.0.0/com.ibm.websphere.nd.doc/ info/ae/ae/urun_ha_cg_custprop.html

• Question 85:

  What must be done to delete one or more files from an application when using a partial application update?

  A. Manually delete the files from the file system (on all nodes if clustered).

  B. Supply the paths to the files that should be deleted in the administrative console.

  C. Include a META-INF/ibm-partialapp-delete.props in the partial application update file.

  D. Select the files that need to be deleted in the file selector section of the form for the partial application update.

  Correct Answer: C

  If you want to delete application files when you deploy a partial application update, you must first supply a

  special metadata file called META-INF/ibm-partialapp-delete.props in the partial application compressed

  file before you continue with the following procedure.

  Etc.

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSZLC2_8.0.0/

  com.ibm.commerce.developer.doc/tasks/tdpdeploying_j2ee_assets_partial.htm

• Question 86:

  An administrator has deployed an application that uses 30 unique SQL statements with a maximum data source connection pool size of 10.

  What is the recommended prepared statement cache size for the application?

  A. 10

  B. 30

  C. 40

  D. 300

  Correct Answer: B

  To determine the highest value for your cache size to avoid any cache discards, add the number of uniquely prepared statements and callable statements, as determined by the SQL string, concurrency, and the scroll type, for each application that uses this data source on a particular server. This value is the maximum number of possible statements that can be cached on a given connection over the life of the server. Setting the cache size to this value means that you never have cache discards. In general, configure a larger cache for applications with a greater number of statements.

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

• Question 87:

  How can an administrator reduce overhead when utilizing monitored directories?

  A. Increase the polling interval so that the process runs less often.

  B. Decrease the amount of time that the monitored directory is accessible by users.

  C. Decrease the size of the monitored directory so that larger files will not be able to be stored in it.

  D. Configure the monitored directory settings to not automatically synchronize the application once it is installed.

  Correct Answer: A

  To change the standard polling interval setting, specify a number of seconds in the Polling interval field.

  Figure: Configuring the monitored directory

  

  Reference: Application Server V8.5, July 2013, page 852

• Question 88:

  Which two ways are valid ways to install applications to IBM WebSphere Application Server? (Choose two.)

  A. wsadmin script

  B. JMS messaging

  C. IBM Installation Manager

  D. IBM Tivoli Access Manager

  E. Integrated Solutions Console

  Correct Answer: AE

  Deploy an application or module using the administrative console, wsadmin, programming, or deployment tools.

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

• Question 89:

  An administrator would like to uninstall an instance of a multiple instance installation via response file.

  How does the administrator ensure that the correct instance is uninstalled?

  A. All the features must be listed.

  B. The profile ID must point to the correct instance.

  C. The offering ID must point to the correct instance.

  D. The repository location must point to the correct instance.

  Correct Answer: D

  Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/ com.ibm.websphere.installation.nd.doc/ae/cins_WASv85_nd_modify_Win32.html

• Question 90:

  Which statement is true about a request made from a browser for a jsp running in an application server?

  A. The HTTP server plug-in loaded with the embedded HTTP server within the application server forwards the request to the application server.

  B. The plug-in configuration file loaded with the embedded HTTP server within the application server forwards the request to the application server.

  C. The HTTP server plug-in loaded with the HTTP server forwards the request to the embedded HTTP server within the application server. The embedded server forwards the request into the web container.

  D. The plug-in configuration file loaded with the HTTP server forwards the request to the embedded HTTP server within the application server. The embedded server forwards the request into the web container.

  Correct Answer: A

  When IBM HTTP Server receives a request for a JSP file, it passes the request to WebSphere Application Server - Express's servlet engine, which calls the JSP processor. The JSP processor is an internal servlet which converts a JSP file into Java source code and compiles it. The servlet that implements the JSP processor is org.apache.jasper.runtime.JspServlet.