IBM C9510-401 Exam Practice Test Instant Access

Question 1

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 2

An application deployed to a multi-node cluster is reported to have slowness and hung threads. A system administrator is asked to review the logs on each node and identify if the hung threads are a false alarm.

How can the administrator determine that the hung threads are a false alarm?

Analyze the:

Affdc logs

BSystemErr.log

CSystemOut.log

Dnative_stderr.log

Answer : C

Problem(Abstract)

The SystemOut.log contains a WSVR0605W message, also called a hung thread message. A javacore, or thread dump on Solaris and HP-UX, is needed in order to determine how to resolve the potentially hung threads.

Cause

WebSphere Application Server attempts to report potentially hung threads using the hung thread detector. Depending on how the hung thread detector policy is configured, a thread running for a certain interval (default 10 minutes) might be reported as hung and a WSVR0605W message is printed in the SystemOut.log file:

WSVR0605W: Thread <threadname> has been active for <time> and may be hung. There are <totalthreads> in total in the server that may be hung.

References: https://www-01.ibm.com/support/docview.wss?uid=swg21448581

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

A system administrator runs a Jython script that creates and configures several servers and realize that the script fails before completing. Although many tasks succeeded, they are rolled back when the script fails.

Before running the script again, what can the administrator add to the script after each task so the completed tasks are committed even if other tasks fail?

AAdminApp.update()

BAdminConfig.save()

CAdminControl.invoke(server, 'sync')

DAdminTask.backupJobManager('server')

Answer : B

AdminConfig.save()to save changes after script execution.

Question 5

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

Question 6

A system administrator discovers an issue that requires a change to a federated server. In this cell, WebSphere administrative security is enabled, but application security is not enabled.

How should the administrator make this change?

The administrator should use:

Aa web browser to connect to the node agent https port.

Ba web browser to connect to the deployment manager admin_host port.

Cthe job manager to submit a job to update the unmanaged server.

Dan ssh connection to the node and modify the client_types.xml file.

Answer : B

The admin_host virtual host is used for access to the WebSphere administrative console.

At installation time, the host is configured to match requests on the wc_adminhost and wc_adminhost_secure ports for the stand-alone server or deployment manager.

References: WebSphere Application Server V8.5 Administration and Configuration Guide for the Full Profile (July 2013), page 303

Question 7

A system administrator is configuring the security of a new environment. The administrator has been asked to configure one LDAP server that has different sub-trees for business users and administration users.

What should the administrator do to implement the required security configuration?

AInstall and configure a TAI (Trust Association Interceptor)

BConfigure a security domain for the stand-alone LDAP server.

CUse Federated repositories and configure the supported entity types.

DUse Stand-alone custom registry and configure the flat file implementation.

Answer : C

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