QUESTION: 45

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?

IBM_CS_OOM_ACTION
IBM_CS_DATASTACK_MEG
IBM_CS_WIRE_FORMAT_VERSION
IBM_CS_HAM_PROTOCOL_VERSION

Answer(s): A

Explanation:

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

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QUESTION: 46

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

Bus security settings
J2C authentication settings
Session Initiation Protocol (SIP) authentication settings
Common Secure Interoperability Version 2 (CSIV2) settings

Answer(s): D

Explanation:

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

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QUESTION: 47

What does the following JVM argument do?
-Xverbosegclog:${SERVER_LOG_ROOT}/verbosegc.m%d.7/18/16M%S.%pid.txt,20,10000

It changes the default values for verbosegc logging.
It changes the default location of the verbosegc logging.
It configured verbosegc logging once it has already been enabled.
It sets the default value for enabling and configuring verbosegc logging.

Answer(s): B

Explanation:

-Xverbosegclog[: <file> [,<X>,<Y>]]
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 <X> and <Y> the -verbose:gc output is redirected to <X> files, each containing <Y> 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:

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QUESTION: 48

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

Dynamic Workload Management is enabled by default in dynamic clusters.
The application placement controller can start and stop a dynamic cluster that is in automatic mode only.
Using the autonomic request flow manager (ARFM) in manual mode will not affect dynamic cluster mode.
Using static clusters in an Intelligent Management enabled environment will acquire some of a dynamic cluster features.
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.

Answer(s): A,E

Explanation:

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

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