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?

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

Correct Answer: D
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

A system administrator needs to set a new Liberty profile environment to support an application.
What should the administrator do to enable this environment for high availability and scalability of the application?

1. A. Define multiple server members in one collective controller.
2. B. Define multiple servers in a cluster in one collective controller.
3. C. Define multiple collective controllers within a Liberty collective.
4. D. Define multiple server members in multiple collective controllers.

Correct Answer: B
Setting up Liberty server clusters
A Liberty can be configured into a server cluster for application high availability and scale. The collectiveController-1.0 feature and its capabilities are available only in multiple-server products such as WebSphere® Application Server Liberty Network Deployment and WebSphere Application Server Liberty for z/OS. The feature is not available in single- server products such as WebSphere Application Server Liberty, WebSphere Application Server Liberty - Express, or WebSphere Application Server Liberty Core. If you have a multiple-server product installation, you can use its collectiveController-1.0 feature to work with collective members from single-server products.
References: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.wlp
.nd.doc/ae/cwlp_server_clusters.html

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?

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

Correct Answer: B
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

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?

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

Correct Answer: C
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

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
.
What step(s) can the administrator perform to uninstall the application?

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

Correct Answer: D
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.mul tiplatform.doc/ae/trun_app_install_dragdrop_prop.html