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
You want to capture WebLogic internal events correlated with JVM events for viewing offline. What three actions must you take to enable this within WebLogic?
| A. Run WebLogic in a JRockit JVM and ensure the Flight Recorder is enabled.
| B. Configure the WebLogic Diagnostic Framework Event Volume to Low, Medium, or High depending on the type of events you want to capture.
| C. Configure the WebLogic Diagnostic Framework bridge to send events to the JRockit Flight Recording.
| D. Take a dump from the default recording or create a new recording for the time period you want to capture. |
A. Run WebLogic in a JRockit JVM and ensure the Flight Recorder is enabled.
B. Configure the WebLogic Diagnostic Framework Event Volume to Low, Medium, or High depending on the type of events you want to capture.
D. Take a dump from the default recording or create a new recording for the time period you want to capture.
A: You can enable JFR at runtime to take JRA recordings from the JRockit Management Console. You also have the option of turning off the JFR and recordings at the JRockit JVM level from the java command line using: $ java -XX:-FlightRecorder B: * In most environments, there is little performance impact when the Diagnostic Volume is set to Low and the most performance impact if Diagnostic Volume is set to High. The volume of diagnostic data produced by WebLogic Server needs to be weighed against potential performance loss. * WLDF provides the Diagnostic Volume attribute to set the amount of code coverage that is enabled and the amount of data provided in the events that are generated for the covered code The following code example sets the volume to Medium: connect() edit() startEdit() cd("Servers/myserver") cd("ServerDiagnosticConfig") cd("myserver") cmo.setWLDFDiagnosticVolume("Medium") save() activate() D: Integrated with the WebLogic Diagnostic Image and Watch and Notification system • Enables capture based on system state, event – capture during event; no need to replicate • Watch for stuck thread count, heap size increase, available memory, etc. • Set up notifications: capture WLDF image • Diagnostic image capture spurs JFR file generation; JFR file included in diagnostic image • Includes full JFR data from all event generators Note: * WebLogic Diagnostic Framework (WLDF) provides specific integration points with JRockit Mission Control Flight Recorder. WebLogic Server events are propagated to the Flight Recorder for inclusion in a common data set for runtime or post-incident analysis. Oracle Fusion Middleware Performance and Tuning for Oracle WebLogic Server, Tuning WebLogic Diagnostic Framework and JRockit Flight Recorder Integration Reference: JRockit Flight Recorder & WebLogic Diagnostic FrameWork (WLDF) Integration
Question # 3
Which statement is FALSE regarding WebLogic Server 12c?
| A. supports Java EE 6.0
| B. supports WebLogic Web Services 8.1 Application Environment
| C. includes a new Maven plug-in
| D. supports use of annotations in resource adapter class files |
B. supports WebLogic Web Services 8.1 Application Environment
Incorrect: Not A: New or enhanced WebLogic 12c features include JAVA EE 6 support all kinds of JEE6 specifications Not C: 12c do include a new Maven plug-in Not D: For 1.6 adapters, you can embed metadata annotations in the resource adapter class files to specify deployment information, eliminating the need to create the ra.xml file manually.
Question # 4
A customer needs to ensure that the number of threads servicing an application does not exceed the number of database connections available to the application. What step must you take to address this situation? | A. Configure a Max Threads Constraint and add your application to the list of applications for the Constraint.
| B. Configure a Work Manager with a Maximum Threads Constraint tied to the Connection Pool and configuration your application to use the Work Manager.
| C. Configure a Work Manager with a Minimum Threads Constraint tied to the Connection Pool and configure your application to use the Work Manager.
| D. Configure a global MaxThreads constraint and target it to the server or clusters where your application is deployed.
| E. Configure the startup parameter "-Dwls-maxThreads" to be the same as the number of database connections configured. |
B. Configure a Work Manager with a Maximum Threads Constraint tied to the Connection Pool and configuration your application to use the Work Manager.
To manage work in your applications, you define one or more of the following Work Manager components: Fair Share Request Class: Response Time Request Class: Min Threads Constraint: Max Threads Constraint: Capacity Constraint Context Request Class: Note: * max-threads-constraint—This constraint limits the number of concurrent threads executing requests from the constrained work set. The default is unlimited. For example, consider a constraint defined with maximum threads of 10 and shared by 3 entry points. The scheduling logic ensures that not more than 10 threads are executing requests from the three entry points combined. A max-threads-constraint can be defined in terms of a the availability of resource that requests depend upon, such as a connection pool. A max-threads-constraint might, but does not necessarily, prevent a request class from taking its fair share of threads or meeting its response time goal. Once the constraint is reached the server does not schedule requests of this type until the number of concurrent executions falls below the limit. The server then schedules work based on the fair share or response time goal. * WebLogic Server prioritizes work and allocates threads based on an execution model that takes into account administrator-defined parameters and actual run-time performance and throughput Administrators can configure a set of scheduling guidelines and associate them with one or more applications, or with particular application components. * WebLogic Server uses a single thread pool, in which all types of work are executed. WebLogic Server prioritizes work based on rules you define, and run-time metrics, including the actual time it takes to execute a request and the rate at which requests are entering and leaving the pool. The common thread pool changes its size automatically to maximize throughput. The queue monitors throughput over time and based on history, determines whether to adjust the thread count. For example, if historical throughput statistics indicate that a higher thread count increased throughput, WebLogic increases the thread count. Similarly, if statistics indicate that fewer threads did not reduce throughput, WebLogic decreases the thread count. This new strategy makes it easier for administrators to allocate processing resources and manage performance, avoiding the effort and complexity involved in configuring, monitoring, and tuning custom executes queues. Reference: Using Work Managers to Optimize Scheduled Work
Question # 5
Which action cannot be done in a scripted, automated fashion using WLST?
| A. collecting run-time metrics and sending an email if user-defined thresholds are exceeded
| B. configuring Clusters and Managed Servers
| C. starting Managed Servers using the Node Manager
| D. installing WebLogic binaries on a remote machine using Node Manager
| E. configuring a Managed Server on a remote machine where the Node Manager is installed but no other Managed Servers from the domain exist |
D. installing WebLogic binaries on a remote machine using Node Manager
http://docs.oracle.com/middleware/1212/wls/WLSTG/domains.htm
Question # 6
In a Java EE messaging application, one MDB is consuming a lot of memory at high traffic. What configuration should you use to prevent possible out-of-memory error at high traffic and at the same time not losing messages?
| A. Configure a Work Manager for the MDB with a Maximum Thread Constraint.
| B. Configure a Work Manager for the MDB with a Minimum Thread Constraint.
| C. Configure a Work Manager for the MDB with a Maximum Thread Constraint and a Capacity Constraint.
| D. Configure a Work Manager for the MDB with a Minimum Thread Constraint and a Capacity Constraint.
| E. Configure a Work Manager for the MDB with both a Maximum Thread Constraint and Minimum Thread Constraint. |
B. Configure a Work Manager for the MDB with a Minimum Thread Constraint.
* When to Use Work Managers Following are guildelines to help you determine when you might want to use Work Managers to customize thread management: / The default fair share is not sufficient. This usually ocurrs in situations where one application needs to be given higher priority over another. / A response time goal is required. / A minimum thread constraint needs to be specified to avoid server deadlock
Question # 7
Integration between _______ multidata sources and _____ is defined as the Grid Link for RAC.
| A. Oracle WebLogic Server; Oracle Database
| B. Oracle WebLogic Server clusters; Oracle Database
| C. Oracle WebLogic Server clusters; Oracle Database RAC
| D. Oracle OC4J; Oracle Database RAC
| E. Oracle WebLogic Server; Oracle OC4J |
C. Oracle WebLogic Server clusters; Oracle Database RAC
The WebLogic Server JDBC subsystem has supported Oracle RAC since WLS version 8.1 SP5, 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 policy2. A RAC multi data source configuration requires that each member data source obtain connections to a particular RAC instance, as illustrated in the following diagram of a three-node RAC cluster configuration.
 Reference: Oracle WebLogic Server Active GridLink for Oracle Real Application Clusters(RAC)
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