Question # 1
Which two tasks can be performed when WLST is in OFFLINE mode?
|
A. modifying the configuration of an online domain
| B. modifying the configuration of an offline domain
| C. viewing runtime performance data in ONLINE mode
| D. viewing runtime performance data in OFFLINE mode
| E. creating and extending domains |
B.
modifying the configuration of an offline domain
E. creating and extending domains
WLST enables you to create a new domain or update an existing domain without connecting to a running WebLogic Server (that is, using WLST offline)—supporting the same functionality as the Configuration Wizard. E: With WLST you can Creating a Domain (Offline) Updating an Existing Domain (Offline) Creating a Domain Template (Offline) Exporting Diagnostic Data (Offline) Stepping Through a Sample Script: Creating a Domain Using WLST Offline Reference: Creating and Configuring WebLogic Domains Using WLST Offline
Question # 2
WebLogic 12c, the Maven plug-in has been enhanced with which Maven goal?
|
A. wls:unzip, wls:install-domain, wls:start-domain, wls:wlst, wls:appc
| B. wls:install, wls:install-domain, wls:start-domain, wls:wlst, wls:appc
| C. wls:unzip, wls:create-domain, wls:start-domain, wls:wlst, wls:appc
| D. wls:install, wls:create-domain, wls:start-server, wls:wlst, wls:appc: |
D.
wls:install, wls:create-domain, wls:start-server, wls:wlst, wls:appc:
wls-maven-plugin—Delivered in WebLogic Server 12c, provides enhanced functionality to install, start and stop servers, create domains, execute WLST scripts, and compile and deploy applications. Reference: Developing Applications for Oracle WebLogic Server, Using the WebLogic Development Maven Plug-In
Question # 3
What does the Web Session Affinity feature of Active GridLink for RAC provide?
|
A. It mandates that HTTP sessions must be stored in an Oracle RAC database for the highest throughput and availability.
| B. It pins a connection to the thread associated with a web session such that subsequent connection reservations are significantly faster.
| C. It stores a reference to the connection associated with an HTTP session in the session object.
| D. It allows developers to modify how their web application reserves and releases database connections to allow enhanced performance.
| E. It provides improved performance by associating a database connection with an HTTP session. |
E.
It provides improved performance by associating a database connection with an HTTP session.
Session Affinity Policy Web applications where a user session has back-to-back online transaction processing (OLTP) have better performance when repeated operations against the same set of records are processed by the same RAC instance. Business applications such as online shopping and online banking are typical examples of this pattern. A GridLink data source uses the Session Affinity policy to ensure all the data base operations for a web session, including transactions, are directed to the same Oracle RAC instance of a RAC cluster. Note: The context is stored in the HTTP session. It is up to the application how windows (within a browser or across browsers) are mapped to HTTP sessions. Note 2: * GridLink Affinity WebLogic Server GridLink affinity policies are designed to improve application performance by maximizing RAC cluster utilization. A GridLink data source monitors RAC load balancing advisories (LBAs) using the AffEnabled attribute to determine if RAC affinity is enabled for a RAC cluster. The first connection request is load balanced using Runtime Connection Load-Balancing (RCLB) and is assigned an Affinity context. All subsequent connection requests are routed to the same Oracle RAC instance using the Affinity context of the first connection until the session ends or the transaction completes
Reference; Configuring and Managing JDBC Data Sources for Oracle Weblogic server 12c, Using GridLink Data Sources
Question # 4
A customer has a Stock Watch application that publishes stock recommendations to different customers and programs. The stock recommendation message should be processed by only one of the JMS Servers in the cluster. Which JMS model should be used?
|
A. JMS Queue
| B. Distributed JMS Queue
| C. Uniform Distributed Topic
| D. Partitioned Distributed Topic |
JMS queue A staging area that contains messages that have been sent and are waiting to be read. Note that, contrary to what the name queue suggests, messages don't have to be delivered in the order sent. A JMS queue only guarantees that each message is processed only once. Incorrect: Not B: (Only one queue required) * A distributed destination is a set of destinations (queues or topics) that are accessible as a single, logical destination to a client. A distributed destination has the following characteristics: It is referenced by its own JNDI name. Members of the set are usually distributed across multiple servers within a cluster, with each destination member belonging to a separate JMS server. * A distributed queue is a set of physical JMS queue members. As such, a distributed queue can be used to create a QueueSender, QueueReceiver, and a QueueBrowser. The fact that a distributed queue represents multiple physical queues is mostly transparent to your application. Not Topic: JMS topic A distribution mechanism for publishing messages that are delivered to multiple subscribers.
Question # 5
A customer is developing a custom application that involves a multistep provisioning process for a new account. There is a custom Java client application that is generating multiple JMS messages as part of the process and sending them to the WebLogic tier where they are processed. Which three steps must you take to implement the solution to allow for scalability and parallel processing of multiple simultaneous provisioning requests while ensuring messages for an individual process are not delivered out of order?
|
A. Update the client application that is creating the JMS messages to use Unit of Work | B. Configure a WebLogic Cluster for Distributed JMS.
| C. Update the client application that is creating the JMS messages to use Unit of Order.
| D. Enable XA Transactions on the JMS Connection Factory used by the client application.
| E. Enable Load Balancing on the JMS connection factory used by the client application |
B.
Configure a WebLogic Cluster for Distributed JMS.
C. Update the client application that is creating the JMS messages to use Unit of Order.
D. Enable XA Transactions on the JMS Connection Factory used by the client application.
C: Message Unit-of-Order is a WebLogic Server value-added feature that enables a standalone message producer, or a group of producers acting as one, to group messages into a single unit with respect to the processing order. This single unit is called a Unit-of-Order and requires that all messages from that unit be processed sequentially in the order they were created. D Transactions required for parallel processing. Incorrect: A: Many applications need an even more restricted notion of a group than provided by the Message Unit-of-Order (UOO) feature. If this is the case for your applications, WebLogic JMS provides the Unit-of-Work (UOW) Message Groups, which allows applications to send JMS messages, identifying some of them as a group and allowing a JMS consumer to process them as such. For example, an JMS producer can designate a set of messages that need to be delivered to a single client without interruption, so that the messages can be processed as a unit. Further, the client will not be blocked waiting for the completion of one unit when there is another unit that is already complete. Note: * WebLogic JMS defines two default connection factories, which you can look up using the following JNDI names: weblogic.jms.ConnectionFactory weblogic.jms.XAConnectionFactory Reference: Using Message Unit-of-Order
Question # 6
You deploy two different applications to the WebLogic container. One application use Xerces parser version A and the other application uses Xerces parser version B. Both these versions are different from the parser version that the WebLogic server uses internally. You want to use the Filtering Classloader feature to solve this problem. What action would you take to generate proper filtering Classloader entries?
|
A. Modify the applications to use the same version that WebLogic uses internally.
| B. Based on available examples of Filtering Classloader entries, try to modify get the proper entries.
| C. Deploy and use the Classloader Analyzing Tool to resolve all conflicts with conflicting libraries. This tool will generate all proper entries.
| D. Split the application into separate WebLogic containers and use different WLS versions of Xerces but identical that applications require |
B.
Based on available examples of Filtering Classloader entries, try to modify get the proper entries.
Note: * The FilteringClassLoader provides a mechanism for you to configure deployment descriptors to explicitly specify that certain packages should always be loaded from the application, rather than being loaded by the system classloader. This allows you to use alternate versions of applications such as Xerces and Ant. * To configure the FilteringClassLoader to specify a certain package is loaded from an application, add a prefer-application-packages descriptor element to the weblogicapplication. xml which details the list of packages to be loaded from the application. The following example specifies that org.apache.log4j.* and antlr.* packages are loaded from the application, not the system classloader: <prefer-application-packages> <package-name>org.apache.log4j.*</package-name> <package-name>antlr.*</package-name> </prefer-application-packages> Reference: Understanding WebLogic Server Application Classloading
Question # 7
In the area of Performance Management and Diagnostics, which feature is supported in Oracle Enterprise Manager 12C?
|
A. Search information in logs across multiple domains
| B. View different log information in single console location
| C. Save current performance data as baseline to be used in comparison with future data
| D. Provides single dashboard across multi-tier composite application |
A.
Search information in logs across multiple domains
Question # 8
In the absence of shared storage between cluster nodes, which two actions can you take to configure a High Availability architecture? |
A. Move domain logs to a highly available database.
| B. Move server logs to a highly available database.
| C. Move transaction logs to a highly available database.
| D. Move JMS persistent stores to a highly available database.
| E. Move error logs to a highly available database |
C.
Move transaction logs to a highly available database.
D. Move JMS persistent stores to a highly available database.
Question # 9
A common approach to solve application performance issues is to add more hardware. Which two reasons describe why this alone does not always solve performance problems?
|
A. There may be a bottleneck in the application that additional hardware would not solve.
| B. Adding more hardware is costly and time consuming.
| C. Adding hardware at the application layer may place additional load on an already overloaded database, network appliance, or storage system.
| D. Adding more hardware may introduce new configuration requirements that need to be tested. |
A.
There may be a bottleneck in the application that additional hardware would not solve.
C. Adding hardware at the application layer may place additional load on an already overloaded database, network appliance, or storage system.
Question # 10
To use Active Cache features in WebLogic 12C, which three libraries are needed from the WebLogic Server installation to be deployed in WebLogic Server?
|
A. coherence-work.jar
| B. coherence.jar
| C. active-cache-1.0.jar
| D. coherence-web-spi.war |
B.
coherence.jar
C. active-cache-1.0.jar
D. coherence-web-spi.war
B, D: In addition to the coherence.jar file, Coherence provides a deployable shared library, coherence-web-spi.war, that contains a native plug-in to WebLogic Server's HTTP Session Management interface. Coherence also provides the active-cache-1.0.jar file which contains the classes that allow WebLogic Server to interact with Coherence. C: The active-cache-1.0.jar is included in the WebLogic Server installation. Reference: Oracle Coherence Tutorial for Oracle Coherence
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