IBM C9510-401 Exam Practice Test Instant Access

Question 1

A system administrator needs to configure a JDBC provider and a data source for an application in a clustered environment. The administrator also needs to copy the JDBC drivers from the database server to the application server machines.

How can the administrator meet these requirements?

ACreate a JDBC provider and the data source in the cluster scope.Copy the driver to all nodes.Set the environment variable at the node level to the driver's path.

BCreate a JDBC provider in the server scope and the data source in the node scope.Copy the driver to all application servers.Set the environment variable at the node level to the driver's path.

CCreate a JDBC provider in the node scope and the data source in the cell scope.Copy the driver to the deployment manager.Set the environment variable at the server level to point to the deployment manager path.

DCreate a JDBC provider in the application scope and the data source in the server scope.Copy the driver to all application server directories.Set the environment variable in each JVM to the driver's path.

Answer : A

Question 2

Which one of the following options describes the runtime flow starting from the client browser in a clustered WebSphere Application Server Network Deployment topology?

AHTTP server -> job manager -> admin agent -> HTTP server plug-in

BLoad balancer -> HTTP server -> HTTP server plug-in -> application server

CApplication server -> node agent -> deployment manager -> load balancer

DDeployment manager -> node agent -> HTTP server plug-in -> HTTP server

Answer : B

Question 3

While monitoring a cluster in the cell, the administrator notices that one server in the cluster periodically loses connections to the database. When this happens, requests to the server have a significantly decreased response time and various error conditions are listed in the log files for the server. Since the error codes are returned quickly, the server starts returning responses faster than the average service times for the application. Due to this, the weight for the server is increased and a large percentage of incoming requests are being routed to the erroneous server and the server is getting overloaded with requests.

How can the administrator detect these conditions in the future and take action to prevent this problem?

AConfigure the storm drain health policy.

BConfigure the on demand router (ODR) transport chain to tune inbound connections.

CMonitor the JVM heap usage to determine a new server weight.

DEnable the PMI Extended statistic set and use the Connection Pool summary report.

Answer : A

Storm drain condition tracks requests that have a significantly decreased response time. This policy relies on change point detection on given time series data.

References: https://www.ibm.com/support/knowledgecenter/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/cwve_odhealth.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?

AEnable application lazy start with elasticity mode.

BSet the proactiveIdleStop custom property to true.

CSet the Number of instances to a value greater than zero.

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

Answer : D

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 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?

APerform a soft rollout.

BPerform a hard rollout.

CPerform an atomic rollout.

DPerform a concurrent activation rollout.

Answer : C

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 6

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:

Afalse in all three WebSphere Application Server cells.

Bfalse in one WebSphere Application Server celltrue in the other two WebSphere Application Server cells.

Ctrue in all three WebSphere Application Server cells.

Dtrue in one WebSphere Application Server cellfalse in the other two WebSphere Application Server cells.

Answer : D

References:

Question 7

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?

ANumber of requests, Java virtual memory, Average response time

BNumber of requests, Average response time, Web server thread pools

CAverage response time, Java virtual memory, Number of Live HTTP Sessions

DAverage response time, Web server thread pools, Number of Live HTTP Sessions

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

IBM C9510-401 IBM WebSphere Application Server Network Deployment V8.5.5 and Liberty Profile Exam Practice Test