Oracle Weblogic Server 11g: System Administration I
Question No: 11
Which two statements are true about adding servers to a cluster?
When you create a cluster, you must add at least one server to it.
Only managed servers can be in a cluster.
The administration server is automatically added to a new cluster.
You must explicitly identify which servers belong to the cluster.
Explanation: A cluster must include at least one server.
A clustered is administered through an administration server, but the cluster consists of managed servers only.
Question No: 12
Consider a single JMS module that includes a connection factory as well as queue.
Based on your system’s requirements, the connection factory needs to be made available to all servers in the domain. The queue, on the other hand, can be targeted to only a single JMS server domain.
What is the best way to achieve the desired JMS setup?
Create two subdeployments within the JMS module.
Target the JMS server to the JMS module.
Target the JMS module to the entire domain.
Replace the queue with a topic.
Explanation: A subdeployment is a mechanism by which JMS module resources (such as queues, topics, and connection factories) are grouped and targeted to a server resource (such as JMS servers, server instances, SAF agents, or a cluster).
For example, you can group a connection factory with stand-alone queues or topics in a subdeployment targeted to a specific JMS server, which guarantees that all these resources are co-located to avoid extra network traffic. Another advantage of such a configuration would be if the targeted JMS server needs to be migrated to another WebLogic server instance, then the connection factory and all its connections will also migrate along with the JMS server#39;s destinations. However, when stand-alone queues or topics are members of a subdeployment, a connection factory can only be targeted to the same JMS server.
Reference: Oracle Fusion Middleware Oracle WebLogic Server Administration Console Online Help 11g Release 1, Configure subdeployments in JMS system modules
Question No: 13
Which three attributes are part of the configuration of an existing Managed Server and can be modified through thequot; administration console?
name of the server
the cluster it is in
the machine it runs on
its replication group
whether it is in Development Mode or Production Mode
that it should become the Administration Server for the domain
Explanation: B: Attribute label: Cluster
The cluster to which this server belongs. If set, the server will listen for cluster multicast events.
This is a configurable attribute. C: Attribute label: Machine
The WebLogic Server host computer (machine) on which this server is meant to run. This is a configurable attribute.
D: Server -gt; Configuration -gt; Cluster
A WebLogic Server cluster is a group of servers that work together to provide a more scalable, more reliable application platform than a single server.
Use this page to specify a server#39;s primary and secondary replication group, cluster weight, and the interface address used to handle multicast traffic.
Attribute label: Replication Group
Description: Defines preferred clustered instances considered for hosting replicas of the primary HTTP session states created on the server.
Reference: BEA WebLogic Server 8.1 Documentation, Server -gt; Configuration -gt; General
Question No: 14
Which can be associated with multiple domains?
Explanation: A Node Manager process is not associated with a specific WebLogic domain but with a machine. You can use the same Node Manager process to control server instances in any WebLogic Server domain, as long as the server instances reside on the same machine as the Node Manager process.
Reference: Using Node Manager to Control Servers
Question No: 15
Identify two supported methods of deploying a JMS module to a domain.
Create a module by using the administration console.
Load a module into the WebLogic database.
Include a module file within a web application archive.
Include a module file within an enterprise application archive.
Define a module within an existing JDBC module.
Explanation: A: Main Steps for Creating Packaged JMS Application Modules Follow these steps to configure a packaged JMS module:
If necessary, create a JMS server to target the JMS module to, as explained in quot;Configure JMS Serversquot; in the Administration Console Online Help.
Create a JMS system module and configure the necessary resources, such as queues or topics, as described in quot;Configure JMS system modules and add JMS resourcesquot; in the Administration Console Online Help.
The system module is saved in config\jms subdirectory of the domain directory, with a quot;-
Copy the system module to a new location, and then:
Give the module a unique name within the domain namespace.
Delete the JNDI-Name attribute to make the module application-scoped to only the application.
Add references to the JMS resources in the module to all applicable J2EE application component#39;s descriptor files, as described in Referencing a Packaged JMS Application Module In Deployment Descriptor Files.
Package all application modules in an EAR, as described in Packaging an Enterprise Application With a JMS Application Module.
Deploy the EAR, as described in Deploying a Packaged JMS Application Module.
D: JMS application modules can be packaged as part of an Enterprise Application Archive (EAR), as a packaged module. Packaged modules are bundled with an EAR or exploded EAR directory, and are referenced in the weblogic-application.xml descriptor.
The packaged JMS module is deployed along with the Enterprise Application, and the resources defined in this module can optionally be made available only to the enclosing application (i.e., as an application-scoped resource). Such modules are particularly useful when packaged with EJBs (especially MDBs) or Web Applications that use JMS resources. Using packaged modules ensures that an application always has required resources and simplifies the process of moving the application into new environments.
Reference: Packaging JMS Application Modules In an Enterprise Application
Question No: 16
Which statement is true about the java Node Manager?
It runs on Windows not on Linux
In its secure form, it uses one-way SSL.
It does not use the nodemanager.domains file, whereas the script-based Node Manager.
Unlike the script based Node Manager, it should not be run as an operating system service
Explanation: Node Manager security relies on a one-way SSL connection between the
client and server.
Reference: Oracle Fusion Middleware Oracle WebLogic Server Administration Console Online Help 11g Release 1, Configuring Java-based Node Manager Security
Question No: 17
Which two statements are true about a WebLogic domain?
It is the basic administrative unit of WebLogic Server.
It is an optional administrative construct to organize groups of WebLogic
Administration Servers are defined within a domain, but Managed Servers
You must first have a domain to define a WebLogic Server cluster.
Every domain has one Administration Server and at least one managed server
Explanation: A: A domain is the basic administration unit for WebLogic Server instances. D: To define a WebLogic Server cluster there must be a domain:
Note: Before you start the Managed Servers in a domain, start the Administration Server. When you start a standalone or clustered Managed Server, it contacts the Administration Server for its configuration information. In this way, the Administration Server operates as the central control entity for the configuration of the entire domain.
Question No: 18
Which two statements are true about multicast communication within a cluster?
Multicast can be used for cluster heartbeat messages.
Multicast is used to replicate session state between servers.
Multiple clusters can share the same multicast address and port.
You may disable multicast on individual cluster members.
Multicast traffic is often limited to a single subnet.
Explanation: A: WebLogic Server instances in a cluster communicate with one another using two basic network technologies:
IP sockets, which are the conduits for peer-to-peer communication between clustered server instances.
IP unicast or multicast, which server instances use to broadcast availability of services and heartbeats that indicate continued availability.
E: In many deployments, clustered server instances reside within a single subnet, ensuring multicast messages are reliably transmitted. However, you may want to distribute a WebLogic Server cluster across multiple subnets in a Wide Area Network (WAN) to increase redundancy, or to distribute clustered server instances over a larger geographical area.
Question No: 19
Identify two true statements about an Oracle WebLogic Server JMS Connection Factory.
A default JMS Connection Factory exists and is named weblogic.jms.connections
A Connection Factory can be targeted to only one WebLogic Server.
A JMS Connection Factory#39;s Default Priority and Default Time-to-Live attribute cannot be modified after the Connection Factory is created.
A JMS Connection factory can be created as a system module resource within the administration console.
Reference: Programming WebLogic JMS, Understanding WebLogic JMS
Question No: 20
In WLST, you enter the shutdown () command with no arguments. Which statement is true in this case?
The server you are connected to will shut down.
The command does a quot;Forcequot; shutdown.
The command blocks user interaction.
The command has timeout of 30,000 milliseconds.
Explanation: The WLST life cycle shutdown command gracefully shuts down a running server instance or cluster.
Reference: WebLogic Scripting Tool ,Life Cycle Commands
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