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Oracle 1z0-599 Sample Questions
Question # 1
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.
Answer: A,B,D Explanation: 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.
Reference: 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 # 2
You want to use WLST to view metrics for a running domain. Which command should you
issue to navigate through the Mbean hierarchy containing the metrics?
A. runtime () B. runtimeMbeanServer () C. connectRuntime () D. beginRuntime () E. serverRuntime ()
Answer: E Explanation: Similar to the configuration information, WebLogic Server runtime MBeans
are arranged in a hierarchical data structure. When connected to an Administration Server,
you access the runtime MBean hierarchy by entering the serverRuntime or the
domainRuntime command. The serverRuntime command places WLST at the root of the
server runtime management objects, ServerRuntimeMBean; the domainRuntime
command, at the root of the domain-wide runtime management objects,
DomainRuntimeMBean.
Reference: WebLogic Scripting Tool, Browsing Runtime MBeans
Question # 3
Assume that you would like to clone an existing WebLogic Domain and enable some
customizations. What scenario would you choose?
A. In the Enterprise Manager, find the domain to be cloned. Choose "Clone WebLogic Domain" from the context menu. In the graphical wizard, customize and extend the domain if needed. These steps will only clone only the domain configuration. Binaries with deployments are needed to be cloned by operation on the file system. B. In the Enterprise Manager, find the domain to be cloned. Choose "Clone WebLogic Domain" from the context menu. In the graphical wizard, customize the domain. These steps clone the binaries and domain configuration. If the extension is needed, perform it after cloning in the WebLogic web-based console. C. In the Enterprise Manager, find the domain to be cloned. Choose "Clone WebLogic Domain" from the context menu. In the graphical wizard, customize and extend the domain if it is needed. These steps clone the binaries and domain configuration. D. In the Enterprise Manager, find the domain to be cloned. Choose "Clone WebLogic Domain" from the context menu. These steps clone the binaries and domain configuration. If the customization or extension is needed, complete that after cloning in the WebLogic web-based console. E. In the file system, copy the domain structure of the configuration directory and paste it in the new location. Modify configuration files for address and port. If further customization is needed, open the WebLogic web-based console and perform these modifications.
Answer: C Explanation: The Clone WebLogic Domain option launches a wizard that enables you to
clone a WebLogic Domain from an existing reference domain that is already discovered
with Cloud Control. It allows you to clone the Middleware Home and its binaries, and the
domain configuration.
* If you selected the Cloning a WebLogic Domain option, the Middleware Provisioning:
Domain Configuration page appears. This page contains a set of links to several pages
where you can enter the properties that are most likely to be reconfigured like domain
name, listen addresses for the administration server and managed servers, Node
Manager/Machine configuration, and JDBC data sources.
Question # 4
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
Answer: B,C Explanation: 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 # 5
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
Answer: B,D Explanation: 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 # 6
What is the name of the WebLogic specific deployment descriptor of Java Enterprise
Application?
A. application.xml B. weblogic.xml C. web.xml D. weblogic-application.xml E. config.xml
Answer: D Explanation: The WebLogic Server-specific deployment descriptor weblogic.xml.
If your Web application does not contain a weblogic.xml deployment descriptor, WebLogic
Server automatically selects the default values of the deployment descriptor elements.
Note:
A Web archive (WAR file) contains the files that make up a Web application. A WAR file is
deployed as a unit on one or more WebLogic Server instances. A WAR file deployed to
WebLogic Server always includes the following files:
* One servlet or Java Server Page (JSP), along with any helper classes. * An optional web.xml deployment descriptor, which is a Java EE standard XML document
that describes the contents of a WAR file.
* A weblogic.xml deployment descriptor, which is an XML document containing WebLogic
Server-specific elements for Web applications.
* A WAR file can also include HTML or XML pages and supporting files such as image and
multimedia files.
Reference: weblogic.xml Deployment Descriptor Elements
Question # 7
You are configuring the data source for an Oracle database. You will need to specify a test
table for WebLogic to test the status of the database. Which option should you choose?
A. a table name which has 100s of records B. a table name which has 10s of records C. a table name which has empty records D. a table name which has 1000s of records E. never use a table name
Answer: C Explanation: * When you create a data source using the Administration Console, the
Administration Console automatically sets the Test Table Name attribute for a data source
based on the DBMS that you select. The Test Table Name attribute is used in connection
testing which is optionally performed periodically or when you create or reserve a
connection, depending on how you configure the testing options. For database tests to
succeed, the database user used to create database connections in the data source must
have access to the database table. If not, you should either grant access to the user (make
this change in the DBMS) or change the Test Table Name attribute to the name of a table
to which the user does have access (make this change in the WebLogic Server
Administration Console). * To manually test a connection from a data source, you can use the Test Data Source
feature on the JDBC Data Source: Monitoring: Testing page in the Administration Console
(see “ Test JDBC data sources”) or the testPool() method in the
JDBCDataSourceRuntimMBean. To test a database connection from a data source, Test
Reserved Connections must be enabled and Test Table Name must be defined in the data
source configuration. Both are defined by default if you create the data source using the
Administration Console.
When you test a data source, WebLogic Server reserves a connection, tests it using the
query defined in Test Table Name, and then releases the connection.
Reference: Configuring and Managing JDBC Data Sources for Oracle WebLogic Server,
Tuning Data Source Connection Pools
Question # 8
WebLogic Node Manager can be used to manage the life cycle of WebLogic servers.
WebLogic Node Manager is installed and started _____.
A. Per Machine B. Per Domain C. Per Managed Server D. Per Admin Server
Answer: A 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. 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 # 9
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
Answer: C Explanation: 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 # 10
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
Answer: B Explanation: 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 AT&T in the 1980s, it became a software product of Oracle
Corporation in 2008.
