IBM C9510-401 Online Practice Questions and Exam Preparation

IBM C9510-401 Online Questions & Answers

• Question 1:

  In a test environment, a system administrator has configured an external HTTP server in the DMZ that is routing to a cluster of application servers. The administrator wants to achieve higher performance when routing and prioritizing incoming requests to the back- end cluster.

  How can the system administrator achieve this task?

  A. Configure a cluster of external HTTP servers.
  B. Enable the prefer local option on the cluster members.
  C. Set up a Caching Proxy server between the external web server and the application server.
  D. Place an On Demand Router (ODR) between the external web server and the application servers.
  D. Place an On Demand Router (ODR) between the external web server and the application servers.

  ---

  References: https://www.ibm.com/developerworks/websphere/techjournal/1206_alcott/1206_alcott.html

• Question 2:

  A system administrator completed a WebSphere Application Server installation by using the Installation Manager. During installation, all defaults were selected for the installation root directories and the shared resources directory. Over time, the administrator has updated the installation with various interim fixes and fix packs. The administrator notices that the shared resources directory is very large in size and grows larger each time the Installation Manager is run.

  How can the administrator decrease the size and remove some of the content from the shared resources directory?

  A. Manually delete content from the directory.
  B. During an update, create a new shared resources directory.
  C. Clear the Delete Saved Files option for the Installation Manager.
  D. Set the preserveDownloadedArtifacts preference to false.
  D. Set the preserveDownloadedArtifacts preference to false.

  ---

  Because product payloads are cached in this directory, space requirements can grow very large over the lifetime of the product, as service updates are applied. The WebSphere Application Server product image is large, so if this content is

  permitted to accumulate, then this directory will grow to be many gigabytes in size over the course of multiple fix pack applications. You should never manually delete the content in this folder. Instead, during any installation or maintenance

  operation, you can specify the following preference to remove some of the content in this folder:

  -preferences com.ibm.cic.common.core.preferences.preserveDownloadedArtifacts=false

  References:

  https://www.ibm.com/support/knowledgecenter/en/SSAW57_7.0.0/com.ibm.websphere.inst allation.soafepnd.doc/info/ae/ae/tins_installfp_dist.html

• Question 3:

  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.
  D. Decrease the prepared statement cache size.

  ---

  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.d oc/ae/udat_jdbcdatasorprops.html

• Question 4:

  The application placement controller has been configured with elasticity mode enabled. Intermittently, all instances of a dynamic cluster are removed. After further review, the system administrator noticed that it occurs during peak load on another dynamic cluster.

  The administrator wants to keep at least one instance available. Which configuration is needed in the dynamic clusters?

  A. Enable application lazy start with elasticity mode.
  B. Set the proactiveIdleStop custom property to true.
  C. Set the Number of instances to a value greater than zero.
  D. Disable the option "If other dynamic clusters need resources, stop all instances of this cluster during periods of inactivity".
  D. Disable the option "If other dynamic clusters need resources, stop all instances of this cluster during periods of inactivity".

  ---

  It is not recommended to enable elasticity mode when the following option is set in the administrative console for one or more dynamic clusters:

  If other dynamic clusters need resources, stop all instances of this cluster during periods of inactivity.

  If you have elasticity mode enabled and the option set, the application placement controller can remove all of the custom nodes in the cell.

  References:

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

• Question 5:

  A system administrator in a bank was asked by business users to determine the most accessed JSP page in a web application at normal work load for marketing purpose. Which tool should the administrator use to find the most used JSP page?

  A. Performance and Diagnostic Advisor
  B. IBM Support Assistant Data Collector
  C. High Performance Extensible Logging Log Viewer
  D. Tivoli Performance Viewer (TPV) summary reports
  D. Tivoli Performance Viewer (TPV) summary reports

  ---

  Summary reports are available for each application server. Tivoli Performance Viewer provides the following summary reports for each application server:

  The servlet summary lists all servlets that are running in the current application server. Use the servlet summary view to quickly find the servlet that consumes the most time and the applications that use them, and to determine which servlets

  are invoked most often.

  Etc.

  References:

  https://www.ibm.com/support/knowledgecenter/SSEQTJ_8.5.5/com.ibm.websphere.base.d oc/ae/uprf_tpvserverview.html

• Question 6:

  A system administrator needs to view the list of certificates for unmanaged web server located on a remote system. How should the administrator do this?

  A. View the plugin-cfg.xml
  B. Look at the SSL configuration in the httpd.conf
  C. Use iKeyman to view the keyring.
  D. Use the administrative console to check the content of the cell default keystore.
  C. Use iKeyman to view the keyring.

  ---

  You do not have a secure network connection until you have created a key for secure network communications and received a certificate from a certificate authority (CA) who is designated as a trusted CA on your server. Use IKEYMAN to create the key database file, public-private key pair, and certificate request. After you receive the CA-signed certificate, use IKEYMAN to receive the certificate into the key database where you created the original certificate request.

  References: http://www-01.ibm.com/software/webservers/httpservers/doc/v10/ibm/9atikeyu.htm

• Question 7:

  After installing an enhanced EAR in a WebSphere Application Server environment, a system administrator with Configurator privileges is able to see a JDBC provider and a data source in the Integrated Solution Console (ISC) but is not able to delete these resources.

  How can the administrator resolve this issue?

  A. Use the AdminTask object to delete the resources.
  B. Stop all application server instances and then delete the resources.
  C. Ask another administrator with iscadmin privilege to delete the resource.
  D. Edit the EAR to remove the application scoped resources and reinstall the application.
  A. Use the AdminTask object to delete the resources.

  ---

  The JDBCProviderManagement command group for the AdminTask object includes the following commands:

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

• Question 8:

  A system administrator has created a cluster containing two servers in a same node. The administrator did not select the option Generate unique HTTP ports during the creation of the cluster members. After the cluster creation, the administrator changed the HTTP port of the second cluster member to 9081.

  Testing the servers using the snoop servlet directly to the server's HTTP port, the administrator got the following error message for the second server:

  

  How can the administrator fix this problem?

  A. Regenerate and propagate the HTTP plug-in.
  B. Add the port 9081 to the default_host alias.
  C. Create a new virtual host alias at the cell level for the port 9081.
  D. Edit the server.xml for the second server and add the port 9081.
  B. Add the port 9081 to the default_host alias.

  ---

  Problem(Abstract)

  When setting up IBM Cognos within IBM WebSphere, the URI is not accessible. The error message when trying the http://:/p2pd/servlet/dispatch is

  SRVE0255E: A WebGroup/Virtual Host to handle /p2pd/servlet/dispatch has not been defined.

  Symptom

  Unable to start IBM Cognos Business Intelligence

  Cause

  The virtual host does not contain IBM WebSphere Port that the Application server is listening on. This may be one of several reasons.

  References: http://www-01.ibm.com/support/docview.wss?uid=swg21438842

• Question 9:

  A system administrator has deployed an application. The development team has updated a new version of this application. The administrator needs to immediately deploy this updated application and guarantee that only this new edition is used by clients and that any service requests for the application are queued during the deployment of the new application.

  How can the administrator achieve this task without any downtime to the application?

  A. Perform a soft rollout.
  B. Perform a hard rollout.
  C. Perform an atomic rollout.
  D. Perform a concurrent activation rollout.
  C. Perform an atomic rollout.

  ---

  Performing an atomic rollout activates the new edition on half of the cluster first, and then activates the edition on the remaining half of the cluster. While the first half of the cluster is taken offline and updated, application requests are routed to the second half of the cluster. Verify that half the cluster can handle the entire load during the rollout period.

  References: http://www.aiotestking.com/ibm/how-can-the-administrator-achieve-this-task- without-any-downtime-to-the-application/

• Question 10:

  A system administrator has added a server cluster as a member of a service integration bus (SIB). The administrator needs to configure one messaging engine for each server in this cluster and to have a failover location for each messaging engine.

  What should the administrator do to achieve the required design?

  A. Configure a new messaging engine in each server to support failover.
  B. Configure the data store for each messaging engine for each server in the cluster.
  C. Select scalability with high availability as the messaging engine policy.
  D. Create a core group policy to restrict each messaging engine to a particular server.
  C. Select scalability with high availability as the messaging engine policy.

  ---

  The scalability with high availability configuration ensures that there is a messaging engine for each server in a cluster, and that each messaging engine has a failover location.