1Z0-599 Online Practice Questions and Answers

Correct Answer: B

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:

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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.

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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.

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WebLogic Server uses a single thread pool, in which all types of work are executed. WebLogic Server

Administrators can configure a set of scheduling guidelines and associate them with one or more applications, or with particular application components.

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

Correct Answer: C

Note:

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A multi data source can be thought of as a pool of data sources. Multi data sources are best used for failover or load balancing between nodes of a highly available database system, such as redundant databases or Oracle Real Application Clusters (Oracle RAC).

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(not B) A single GridLink data source provides connectivity between WebLogic Server and an Oracle Database service, which may include multiple Oracle RAC clusters

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High Availability Storage Solutions

If you have applications that need access to persistent stores that reside on remote machines after the migration of a JMS server or JTA transaction log, then you should implement one of the following highly-available storage solutions:

/ File-based stores (default or custom)--Implement a hardware solution, such as a dual-ported SCSI disk or Storage Area Network (SAN) to make a file store available from shareable disks or remote machines.

/ JDBC-accessible stores--Configure a JDBC store or JDBC TLOG store and use JDBC to access this store, which can be on yet another server. Applications can then take advantage of any high-availability or failover solutions offered by your database vendor. In addition, JDBC stores support GridLink data sources and multi data sources, which provide failover between nodes of a highly available database system, such as Oracle Real Application Clusters (Oracle RAC).

Reference: Oracle Fusion Middleware Configuring Server Environments for Oracle WebLogic Server 12c, High Availability Storage Solutions

Correct Answer: ABD

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:

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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.

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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.

Reference: Oracle Fusion Middleware Performance and Tuning for Oracle WebLogic Server, Tuning WebLogic Diagnostic Framework and JRockit Flight Recorder Integration

Reference: JRockit Flight Recorder and WebLogic Diagnostic FrameWork (WLDF) Integration

Correct Answer: C

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)

Correct Answer: ABEF

B: Java EE Enterprise Web Services is supported.

E: New or enhanced WebLogic 12c features include

JAVA EE 6 support all kinds of JEE6 specifications are implemented like :

JSF 2.0,Java Servlets 3.0 JPA 2.0 and EJB 3.1.

Managed Beans 1.0

F: WebLogic 12c also supports supports Java SE 7 (and Java SE 6).

Java language optimizations and Internationalization Client and server support SSL/TLS 1.2 in JSSE to support JAVA Socket Transport security Converged Java VM:JRockit and HotSpot are incorporated with the best features from both. Oracle's Publisher Seminar 2011 during OOW

Incorrect: not C:

Correct Answer: ABDF

Use the Administration Console to:

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(A) Configure, start, and stop WebLogic Server instances

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Configure WebLogic Server clusters

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(D) Configure WebLogic Server services, such as database connectivity (JDBC) and messaging (JMS)

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Configure security parameters, including managing users, groups, and roles

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Configure and deploy your applications

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Monitor server and application performance

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View server and domain log files

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View application deployment descriptors

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(F) Edit selected run-time application deployment descriptor elements

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(B) Control (start, stop, and restart) standalone Coherence cache servers

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(B) Create and configure Coherence clusters

Incorrect:

Not C: The separate Domain Template Builder is used for creating Domain Templates.

Correct Answer: C

Correct Answer: ACE

Use multi-node and clustering to get performance suitable for a product environment.

Correct Answer: ACD

Comparing File Stores and JDBC-accessible Stores

The following are some similarities and differences between file stores and JDBC-accessible stores:

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(A) JDBC stores may make it easier to handle failure recovery since the JDBC interface can access the database from any machine on the same network. With the file store, the disk must be shared or migrated.

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The default persistent store can only be a file store. Therefore, a JDBC store cannot be used as a default persistent store.

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Both have the same transaction semantics and guarantees. As with JDBC store writes, file store writes are guaranteed to be persisted to disk and are not simply left in an intermediate (that is, unsafe) cache.

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Both have the same application interface (no difference in application code).

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(not B, not E) All things being equal, file stores generally offer better throughput than a JDBC store.

/ If a database is running on high-end hardware with very fast disks, and WebLogic Server is running on slower hardware or with slower disks, then you may get better performance from the JDBC store.

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File stores are generally easier to configure and administer, and do not require that WebLogic subsystems depend on any external component.

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File stores generate no network traffic; whereas, JDBC stores generate network traffic if the database is

on a different machine from WebLogic Server.

Reference: Configuring Server Environments for Oracle WebLogic Server 12c, Comparing File Stores and JDBC-accessible Stores

Correct Answer: BCD

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