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Oracle 1z0-134 Exam Practice Questions (P. 5)

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Question #21
You are required to configure a Coherence cluster for a WebLogic domain. Review the image below for the architecture of the WebLogic domain.

The configuration represents the following:
✑ Two WebLogic clusters of n number of servers each
✑ One cluster contains an EAR deployment that contains a WAR module and a GAR module
✑ One cluster contains a GAR deployment
✑ Application data flows into the cluster with the EAR deployment and then to the cluster with the standalone GAR deployment
Based on this configuration, what is the typical configuration of a Coherence cluster for this domain?
  1. A
    Single Coherence cluster that includes both WebLogic clusters. EAR cluster is storage-disabled. GAR cluster is storage-enabled.
  2. B
    Single Coherence cluster that includes both WebLogic clusters/ EAR cluster is storage-enabled. GAR cluster is storage-disabled.
  3. C
    A Coherence cluster for each WebLogic cluster. EAR and GAR clusters use a replicated topology with storage enabled.
  4. D
    Single Coherence cluster that includes both WebLogic clusters. EAR and standalone GAR clusters are both storage-enabled.

Correct Answer:
A
A Coherence cluster can contain any number of managed Coherence servers. The servers can be standalone managed servers or can be part of a WebLogic
Server cluster that is associated with a Coherence cluster.
* storage-disabled a managed Coherence server that is not responsible for storing data and is used to host Coherence applications (cache clients). A
Coherence application GAR is packaged within an EAR and deployed on storage-disabled managed Coherence servers.
* storage-enabled a managed Coherence server that is responsible for storing data in the cluster. Coherence applications are packaged as Grid ARchives
(GAR) and deployed on storage-enabled managed Coherence servers.
Reference:
https://docs.oracle.com/middleware/1212/wls/CLUST/coherence.htm#CLUST660

Question #22
Your WebLogic domain is experiencing a problem. You want to use the WebLogic Diagnostic Framework (WLDF) to diagnose the problem. You have a support case open with Oracle Support, and they have requested a diagnostic image of your server that is experiencing the problem.
The problem is not predictable or reproducible on-demand, but you noticed that the number of requests waiting to execute increases dramatically when the problem does occur. The problem also seems to occur at any time of the day or night.
How would you approach reliably capturing a diagnostic image that contains data that is relevant to the problem that is occurring?
  1. A
    Configure a WLDF watch that triggers a diagnostic image action when the number of requests waiting to execute exceeds a certain threshold.
  2. B
    Configure WebLogic overload protection to automatically trigger a diagnostic image when the number of requests waiting to execute exceeds a certain threshold.
  3. C
    Manually monitor the number of requests waiting to execute and create a diagnostic image when you see the number of requests waiting to execute exceeds a certain threshold.
  4. D
    Configure the server health failure action to trigger a diagnostic image when the number of requests waiting to execute exceeds a certain threshold.

Correct Answer:
A
The Watch & Notifications (W&N) system consumes data generated by other parts of WLDF (MBean data through the Harvester, as well as data from
Instrumentation and/or Log events) and applies configured rules against that data. If a rule evaluates to true, W&N can generate a notification over SNMP, SMTP,
JMX, JMS, or any combination therein.
WLDF supports the following types of notifications:
✑ Diagnostic Images
✑ Java Management Extensions (JMX)
✑ Java Message Service (JMS)
✑ Simple Mail Transfer Protocol (SMTP), for example, e-mail
✑ Simple Network Management Protocol (SNMP)
Incorrect Answers:
B: WebLogic overload protection is used to protect the Weblogic server from overload. In WebLogic Server, all requests, whether related to system administration or application activityare processed by a single thread pool. An administrator can throttle the thread pool by defining a maximum queue length.
C: Manually monitoring takes too much administrative effort.
D: The server has not failed, it is just experiencing a problem. Server health failure is used to recover failed servers.
Reference:
https://docs.oracle.com/cd/E29542_01/web.1111/e13714/config_watch_notif.htm#WLDFC189

Question #23
The image below depicts a high-level diagram of configuration auditing within WebLogic Server. When Administrators make configuration changes to the
WebLogic Server domain, those changes are sent to the audit provider for logging.

What task must be performed in order to make configuration audit messages in the log meaningful to an observer?
  1. A
    Define unique users for all administrators.
  2. B
    Configure a persistent store for log messages.
  3. C
    Configure the CONFIG severity level.
  4. D
    Define the audit message listener for audit messages.

Correct Answer:
D
You can configure the Administration Server to emit a log message when a user changes the configuration or invokes management operations on any resource within a domain. For example, if a user disables SSL on a Managed Server in a domain, the Administration Server emits a log message. These messages provide an audit trail of changes within a domain's configuration. You can then create and use a JMX listener and filter that respond to configuration auditing messages.
Reference:
https://docs.oracle.com/cd/E13222_01/wls/docs81/jmx/notifications.html

Question #24
A hardware load-balancer (HWLB) is positioned as the primary entry point into your WebLogic Server domain. Aspects of your application use SSL to protect data on the network from your clients to your domain.

Which configuration provides the best performance for your domain? (Choose the best answer.)
  1. A
    Configure the HWLB to use an SSL hardware accelerator and terminate SSL.
  2. B
    Configure the HWLB to use pass-through SSL, configure an SSL hardware accelerator on WebLogic, and terminate SSL.
  3. C
    Configure the HWLB to delegate SSL handling to the WebLogic Proxy Plug-in and terminate SSL.
  4. D
    Configure the HWLB to use pass through SSL to the WebLogic Server that it connects to, and terminate SSL.

Correct Answer:
A
In most of the architectures, the SSL is terminated at the hardware load balancer for performance reasons and allows the internal traffic to use HTTP for communication.
Reference:
http://ora-soa.blogspot.se/2012/10/weblogic-setting-wrong-protocol-in-wsdl.html

Question #25
You successfully configured a new dynamic cluster but havent launched any of the dynamic servers. You want to change the configuration for one specific server.
Which parameter can you modify for that server before starting up the dynamic clustered servers for the first time?
  1. A
    listen port number of individual dynamic servers
  2. B
    machine name that hosts a dynamic server
  3. C
    dynamic server name
  4. D
    replication groups
  5. E
    No parameters can be modified.

Correct Answer:
E
A dynamic server is a server instance that has not been individually configured but instead gets its configuration from a server template.
Reference:
http://docs.oracle.com/middleware/1212/wls/WLACH/taskhelp/clusters/CreateDynamicClusters.html

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