Which three JVM options would you add to investigate performance issues in a Hot-Spot JVM?
A. -xx:+PrintGCDetails
B. -xx:+PrintGCTimeStamps
C. -xx:+HandlePromotionFailure
D. -verbose:gc
E. -server
Correct Answer: ABE
A: Print more details at garbage collection.
B: Print timestamps at garbage collection.
C: The youngest generation collection does not require a guarantee of full promotion of all live objects.
E: Default values are listed for Java SE 6 for Solaris Sparc with -server.
Reference: Java HotSpot VM Options
Question 42:
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
Correct Answer: C
*
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 43:
What is the architectural benefit of keeping WebLogic Server transaction log in the database?
A. Oracle does not allow replicating files between data centers, so keeping transaction log in database allows for replication.
B. Many transactions in WebLogic are database centric, so keeping log in database makes Two Phase Commit protocol possible.
C. It obviates the need to keep in sync two replication technologies (file and database) between data centers. The single replication technology is used for frequently changing data.
D. Transaction log in a file system is extremely slow so it cannot be efficiently replicated.
Correct Answer: C
You can configure a JDBC TLOG store to persist transaction logs to a database, which provides the following benefits:
*
Leverages replication and HA characteristics of the underlying database.
*
Simplifies disaster recovery by allowing the easy synchronization of the state of the database and TLOGs.
*
Improved Transaction Recovery service migration as the transaction logs to do not need to be migrated (copied) to a new location.
*
You can configure a JDBC TLOG store to persist transaction logs to a database, which allows you to leverage replication and HA characteristics of the underlying database, simplify disaster recovery, and improve Transaction Recovery service migration.
incorrect:
not B: Read-only, One-phase Commit Optimization requires Oracle DB 11.1.0.7.3PSU or above.
Question 44:
Which four actions can you perform using the WebLogic Admin Console?
A. Stop and start Managed Servers using the Node Manager.
B. Stop and start Coherence Servers using the Node Manager.
C. Create a WebLogic Domain Template.
D. Create and target JDBC connection pools.
E. Create and target WebLogic Diagnostic Framework Diagnostic Modules.
F. Change Java command-line parameters at run time.
Correct Answer: ABDF
Use the Administration Console to:
*
(A) Configure, start, and stop WebLogic Server instances
*
Configure WebLogic Server clusters
*
(D) Configure WebLogic Server services, such as database connectivity (JDBC) and messaging (JMS)
*
Configure security parameters, including managing users, groups, and roles
*
Configure and deploy your applications
*
Monitor server and application performance
*
View server and domain log files
*
View application deployment descriptors
*
(F) Edit selected run-time application deployment descriptor elements
*
(B) Control (start, stop, and restart) standalone Coherence cache servers
*
(B) Create and configure Coherence clusters
Incorrect:
Not C: The separate Domain Template Builder is used for creating Domain Templates.
Question 45:
You want to configure WebLogic so that Managed Servers are restarted when they are in a FAILED state. Which three steps are necessary to accomplish this?
A. Configure Node Manager on the machines where WebLogic Managed Servers need to be started/ restarted.
B. Enable "Auto Restart" in the Node Manager Configuration.
C. Enable "Auto Kill if Failed" in the Node Manager Configuration.
D. Enable "Auto Kill if Failed" for the Managed Server in question.
E. Enable "Auto Restart" for the Managed Server in question.
Correct Answer: ADE
D: auto-kill-if-failed Specifies whether the Node Manager should automatically kill this server (the managed server) if its health state is failed. (Interface=weblogic.management.configuration.ServerMBean Attribute=getAutoKillIfFailed)
When Auto Restart is enabled, Node Manager will try to restart the Managed Server if it crashes or goes down unexpectedly, for instance, as the result of a machine reboot.
E: When Auto Restart is enabled, Node Manager will try to restart the Managed Server if it crashes or goes down unexpectedly, for instance, as the result of a machine reboot.
Reference: Server --> Configuration --> Health Monitoring
Question 46:
Identify the three processes that customers can choose for patching WebLogic Server.
A. Download patches from My Oracle Support and manage them using Smart Update.
B. Use Enterprise Manager to download patches from My Oracle Support and apply patches to WebLogic.
C. Download patches from My Oracle Support and manually modify the classpath of the application server (though it is not recommended).
D. Download patches from My Oracle Support and apply them using the WebLogic Admin Console.
E. Use the Admin Console to connect to My Oracle Support and download patches and then target them to the domain.
Correct Answer: ABC
A: Oracle Smart Update is a standalone Java application that is automatically installed in the Middleware home utils/bsu directory. Smart Update simplifies the process of applying patches to your WebLogic Server installation. When support makes a patch available for an installed version of WebLogic Server, you download the patch from My Oracle Support and then use Oracle Smart Update to apply it to your installation. Smart Update organizes all available updates for you, and has several features that allow a great deal of customizing in the way various patches are applied and managed in your environment.
B: As part of a new Enterprise Manager system, the installation wizard does the following:
* Oracle My Oracle Support Management Plug-In etc.
C: Applying patch from server start script:
After downloading the patch (jar file) follow the below steps:
-Stop your server.
-Then take the path of the folder which has the CRxxxxxx_xxxmpx.jar file and copy it in the CLASSPATH of setDomainEnv.cmd which is in
(/user_projects/domains//bin/setDomainEnv.cmd)
For example, the script would look something like this: set CLASSPATH=%PRE_CLASSPATH%;%WEBLOGIC_CLASSPATH%; C:\extra\my_projects\doc\CR\CR218639_920mp3.jar;C:\extra\my_projects\doc \CR\ CR360676_920mp3.jar;C:\extra\my_projects\doc\CR\CR367966_920mp3.jar; C:\extra\my_projects\doc\CR\CR368155_920mp3.jar;C:\extra\my_projects\doc\CR\CR370311_ 920mp3.jar
-Re-start your server.
-You should see the patch applied in the stdout file.
Question 47:
A customer wants to improve the availability of a web application and provide more predictable scalability
when scaling out the application.
Which Feature of WebLogic should you recommend to help solve this problem?
A. Oracle Web Grid
B. ActiveCache
C. Coherence Grid Edition
D. WebLogic Session Replication
E. Coherence Web Edition
Correct Answer: C
*
Built on top of Oracle Coherence (Coherence), Coherence*Web: / brings Coherence data grid's data scalability, availability, reliability, and performance to in- memory session management and storage. / can be deployed to many mainstream application servers such as Oracle GlassFish Server, Oracle WebLogic Server, IBM WebSphere, Tomcat, and so on
*
Coherence*Web enables HTTP session sharing and management across different Web applications, domains, and heterogeneous application servers. Session data can be stored in data caches outside of the application server, thus freeing application server heap space and enabling server restarts without losing session data.
Incorrect:
A: No such thing Oracle Web Grid
C: Grid Edition licensing includes the unlimited use of Real Time Clients which may be of the following two types: Real Time Cluster Member Client Real Time Extend/TCP Client Reference: Oracle Coherence User's Guide for Oracle Coherence*Web
Question 48:
Identify three advantages of Active GridLink for RAC over multidata source.
A. isolates WebLogic from RAC changes
B. has a simple configuration
C. enables statement caching
D. performs faster failure detection and failover
E. is supported in WebLogic Domain Templates
Correct Answer: ABD
A, B: With Active GridLink for RAC, WebLogic instances are isolated from RAC configuration changes, and DBAs only need to contend with a single data source rather than multiple data sources.
D: Active GridLink for RAC distributes work based on different backend node capacities, automatically detecting and adapting to overworked nodes and hangs. It enables smart load balancing across RAC nodes. This makes it easier to route traffic around node failures, enhancing availability and performance.
Reference: Introducing WebLogic Server 12c
Question 49:
Which two elements of the Java Enterprise Application Archive are required?
A. EJB Archive
B. Deployment Descriptor
C. META-INF sub directory
D. Resource Adapter archive
E. Java library
Correct Answer: AB
A: In WebLogic Server 12c, you can make use of the shared Java EE library feature in WebLogic Server
which provides an easy way to share one or more different types of modules among multiple enterprise
applications. A shared library is a single module or collection of modules that is registered with the Java EE
application container upon deployment. A shared library could be:
· Standalone EJB module
· Standalone web application module
· Multiple EJB modules packaged in an enterprise application · Multiple web application modules packaged
in an enterprise application · Single plain JAR file
B:
* 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.
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