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QUESTION NO:24
Which two statements are true regarding the WebLogic domain?
A. A WebLogic domain can have more than one Administration server.
B. A WebLogic domain has at least one WebLogic server.
C. A WebLogic domain can have at the most one cluster.
D. A WebLogic domain can cross multiple physical machines.
E. Each WebLogic domain is associated with a different Node Manager.
Correct Answer: BD
Explanation
Explanation/Reference:
B: A domain consists of one or more WebLogic Server instances (and their associated resources) that you
manage with a single Administration Server.
D: In a domain, server instances other than the Administration Server are referred to as Managed Servers.
Managed Servers host the components and associated resources that constitute your applications.
Incorrect:
Not A: Each WebLogic Server domain must have one server instance that acts as the Administration
Server.
Not C: A domain can include multiple WebLogic Server clusters and non-clustered WebLogic Server
instances.
Not E: 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. Node
Manager must run on each computer that hosts WebLogic Server instances–whether Administration
Server or Managed Server–that you want to control with Node Manager.
Reference: Overview of WebLogic Server Domains
QUESTION NO:10
A customer has a critical, performance-sensitive web application that connects to a multimode Oracle RAC
database. Which feature of WebLogic can provide signification benefit?
A. The Web Session Affinity feature of Active GridLink for RAC.
B. WebLogic Clustering
C. The Transaction Affinity feature of Active GridLink for RAC
D. Coherence*Web Session Replication
Correct Answer: C
Explanation
Explanation/Reference:
Active GridLink for Oracle RAC
In Oracle WebLogic Server 10.3.4, a single data source implementation has been introduced to support an
Oracle RAC cluster. It responds to FAN events to provide Fast Connection Failover (FCF), Runtime
Connection Load-Balancing (RCLB), and RAC instance graceful shutdown. XA affinity is supported at the
global transaction Id level. The new feature is called WebLogic Active GridLink for RAC; which is
implemented as the GridLink data source within WebLogic Server.
Note:
* The WebLogic Server JDBC subsystem has supported Oracle RAC since WLS version 9.0, originally
developed for Oracle9i RAC. This support is based on a particular type of data source configuration, called
a multi data source. A multi data source is a data source abstraction over one or more individual data
sources. It serves JDBC connections from each of the member data sources according to a specified
policy. A RAC multi data source configuration requires that each member data source obtain connections
to a particular RAC instance.
Reference: How-To: Use Oracle WebLogic Server with a JDBC GridLink Data Source
QUESTION NO:56
You are configuring a JMS server with a need for load balancing the messages. To achieve the load
balance you should and .
A. use regular queues and topics
B. use distributed queues and topics
C. not use subdeployments
D. disable server affinity
E. use message paging
Correct Answer: BC
Explanation
Explanation/Reference:
Load Balancing for JMS
WebLogic Server JMS supports server affinity for distributed JMS destinations and client connections. (B,
not A)
By default, a WebLogic Server cluster uses the round-robin method to load balance objects. To use a load
balancing algorithm that provides server affinity for JMS objects (not D), you must configure the desired
method for the cluster as a whole.
Reference: Using Clusters for Oracle WebLogic Server 12c , Load Balancing for JMS
QUESTION NO:13
You have a durable subscriber, and the subscriber is down or not reachable when the message is
produced. Which two options regarding the expiry of these messages are true?
A. after the subscriber is unavailable for 10 minutes
B. when the subscriber is available
C. after the subscriber is unavailable for after an hour
D. are available until the specified time elapses
E. are expired instantly
Correct Answer: BD
Explanation
Explanation/Reference:
By default, JMS messages never expire. When applications send messages to queues or topics with
durable subscribers, WebLogic must retain the message until it is consumed. This is fine in most point-
to- point messaging applications because consumers are constantly consuming messages. Any
message sent to a queue will typically be consumed in a relatively short period of time. If the consumers
get disconnected, they will usually reconnect as soon as possible and start processing any messages
that might have built up in the queue.
D: For durable subscribers to a topic, this is not necessarily true. The messaging system is forced to retain
any message that has not been consumed by a durable subscriber, regardless of whether that durable
subscriber will ever return. In this case, WebLogic is at the mercy of the durable subscriber to unsubscribe
when it no longer wishes to receive the messages. If the durable subscriber logic is flawed in such a way
that the subscribers do not unsubscribe properly, the messaging system will start to fill up with messages
that may never be delivered. This calls for real caution in using durable subscribers. Fortunately, there is
another way to help deal with this problem. Message expiration can be set at the connection factory level.
Using a connection factory’s default time-to-live attribute, we can specify the number of milliseconds that
WebLogic should retain an undelivered message after it is sent.
QUESTION NO:88
Which four steps are involved to use Active Cache Dependency Injection in a WebLogic Java EE
application?
A. Deploy Active Cache shared library
B. Declare dependency on the shared library
C. Declare all dependency injection entries
D. Package tangosol-coherence-override.xml in modules classpath
E. Package coherence-cache-config.xml in modules classpath
Correct Answer: ABCE
Explanation
Explanation/Reference:
Note:
* Example
If you have additional Coherence caches running on Coherence*Web, then you must merge the cache
configuration information (typically defined in the coherence-cache-config.xml file) with the session
configuration contained in the session-cache-config.xml file. The cache and session configuration must be
consistent across WebLogic Server and Coherence cache servers.
QUESTION NO:59
Identify three reasons that explain why assigning more than one managed serve achieve better
performance than running one managed server with more resources?
A. Thread management inside the JVM process might be less effective than context switching between
processes on the OS level. It is better to combine both these technologies to achieve full saturation
of resources.
B. Current CPUs are multicore units. So starting managed servers in the amount of physical cores
and pinning them 1:1 to cores will always get the best performance.
C. By a combination of prioritization of processes on the OS level and Work Manager in WLS, one could
tune the whole environment more precisely.
D. Assigning more than one managed server to hardware will never bring better performance.
E. More instances means more connections to databases, so one could serve more concurrent calls on
the database level. This is primarily why this approach will give better performance numbers.
F.
Depending on the profile of the application, having more JVMs with smaller heaps will lead to more
predictable response times than fewer JVMs with a large heap.
Correct Answer: CEF
Explanation
Explanation/Reference:
Note:
* Two or more Managed Servers can be configured as a WebLogic Server cluster to increase application
scalability and availability. In a WebLogic Server cluster, most resources and services are deployed
identically to each Managed Server (as opposed to a single Managed Server), enabling failover and load
balancing. A single domain can contain multiple WebLogic Server clusters, as well as multiple Managed
Servers that are not configured as clusters. The key difference between clustered and non-clustered
Managed Servers is support for failover and load balancing. These features are available only in a cluster
of Managed Servers.
* A WebLogic Server cluster provides these benefits:
Scalability
The capacity of an application deployed on a WebLogic Server cluster can be increased dynamically to
meet demand. You can add server instances to a cluster without interruption of service–the application
continues to run without impact to clients and end users.
High-Availability
In a WebLogic Server cluster, application processing can continue when a server instance fails. You
“cluster” application components by deploying them on multiple server instances in the cluster–so, if a
server instance on which a component is running fails, another server instance on which that component is
deployed can continue application processing.
QUESTION NO:20
Which feature is enabled when you start a WebLogic server with the DserverType=wlx option?
A. JDBC
B. JCA
C. JMS
D. EJB
E. Java EE
Correct Answer: A
Explanation
Explanation/Reference:
-DserverType={“wls” | “wlx”}
Specifies the Server Type, which determines the set of services that are started in the server runtime.
The default is “wls”, which starts all WebLogic Server services, including EJB, JMS, Connector, Clustering,
Deployment, and Management.
The “wlx” option starts a server instance that excludes the following services, making for a lighter weight
runtime footprint:
* (not D) Enterprise JavaBeans (EJB)
* (not B, not E) Java EE Connecter Architecture (JCA)
* (not C) Java Message Service (JMS)
Reference: Oracle Fusion Middleware Command Reference for Oracle WebLogic Server , Options for
Configuring Deployment Attributes
QUESTION NO:22
An application is using WebLogic JMS Store and Forward to forward messages from a local JMS queue a
remote WebLogic JMS destination. You need to determine if the messages are being sent from the local
Weblogic Server.
Where do you find information and metrics about Store and Forward components in the WebLogic Admin
Console?
A. JMS Persistent Store
B. JMS Server
C. JMS Distributed Destination
D. JMS Store and Forward
E. Automatic Service Migration
Correct Answer: A
Explanation
Explanation/Reference:
Note:
* Persistent messages are saved in the persistent store on the sending side until they are successfully
forwarded to and acknowledged by the receiving side.
QUESTION NO:67
Which option must you choose to configure Node Manager on a machine (server or zone)?
A. Configure one Node Manager per domain (for example, if there are two domains on one machine, then
you will need to configure two Node Managers).
B. Configure one Node Manager per machine with any number of WebLogic instances running on it.
C. Configure one Node Manager per machine for all WebLogic, OHS, and OEM running on the same
machine.
D. Configure one Node Manager for every WebLogic instance.
E. Configure two or more Node Managers for every WebLogic instance.
Correct Answer: B
Explanation
Explanation/Reference:
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. Node Manager must
run on each computer that hosts WebLogic Server instances–whether Administration Server or Managed
Server–that you want to control with Node Manager.
Reference: Overview of WebLogic Server Domains
QUESTION NO:86
Which product has guaranteed messaging and transactional integrity for 100% reliability, over 25 years of
use in the world’s largest transaction applications?
A. Coherence
B. Tuxedo
C. JRockit
D. WebLogic Server
Correct Answer: B
Explanation
Explanation/Reference:
JCA Adapter
This product is a wrapper to the WebLogic Tuxedo Connector (WTC) found as part of the WebLogic
Server (WLS) product. WTC can only be used on WebLogic, but the JCA adapter allows deploying WTC
capabilities on other Java Application Servers that support the Java EE JCA specification.
Note:
* Tuxedo (Transactions for Unix, Extended for Distributed Operations) is a middleware platform used to
manage distributed transaction processing in distributed computing environments. Tuxedo is a transaction
processing system or transaction-oriented middleware, or enterprise application server for a variety of
systems and programming languages. Developed by ATandT in the 1980s, it became a software product of
Oracle Corporation in 2008.
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