WebLogic : The Application Server

1). If an administration server running machine got crashed, how will you restart the server with same configuration on new machine?

• Oracle WebLogic Server allows the creation of a backup of the server as follows:
  • Install Oracle WebLogic Server on a backup machine.
  • Copy the application files to a backup machine.
  • Copy the configuration files to a backup machine.
  • Restart the Administration Server on a new machine.
• The new Administration Server contacts the Managed Servers and informs them that it is running on a new IP address.
• similarly we can also create a backup for tomcat as well, These ways you follow:

                   /tomcat/config

                   /tomcat/webapps

                   Also note down the version of tomcat you use. 

                   In webapps if you use war files, it should be sufficient to backup only all war files.

                   On restore install tomcat of same version, then copy above folders from backup 

                    (replacing files like server.xml)

                   Please test this setup on a test server. But in short this is all you need.

                   Don't forget the tomcat native in tomcat/bin

2). How can you run Multiple Weblogic server instances in a same physical machine?

• • You can run multiple instances of WLS using different configurations on the same physical machine at the same time by either:
    • Assigning multiple IP addresses to a machine (multihoming) and defining each server to use a unique IP address
    • Specifying the same IP address but using different listen ports
  • A multihomed machine:
  • Is a machine with multiple IP addresses
  • Can run a different WLS instance that is bound to each IP address
  • Can be used to configure a cluster on a single machine
  • In Tomcat, it is also possible to achieve by changing the http, https, ajp and shutdown ports.

3). How will you create Domain Template? Explain briefly?

• • A domain template defines the full set of resources within a domain.
  • Oracle provides sample templates for creating any platform domain.
  • There are three ways to create domain templates:
    • WLST offline command line tool
    • pack command
    • Domain Template Builder (config_builder.sh under WL_HOME/common/bin)
  • Use the Domain Template Builder to create a domain template or an extension template.
  • Using the Domain Template Builder:
  • Define a domain and replicate it across multiple projects
  • Distribute a domain packed with an application that has been developed to run in it
  • A template provides configuration information and files to support a feature or application on a tc Runtime instance. The built-in templates that ship with tc Server make it simple to configure tc Runtime features such as SSL or JMX or to add a management application to an instance at creation time, such as Spring Insight. You can create your own templates by creating a subdirectory in the templates directory of your tc Server installation directory and populating it with files accordingly.

4). What are the default Weblogic provided Groups for security realm?

• Administrators
• Deployers
• Operators
• Monitors
• AppTesters
• CrossDomainConnectors
• AdminChannelUsers

5). What are the default Weblogic provided Roles for security realm?

• Admin
• Deployer
• Operator
• Monitor
• AppTester
• CrossDomainConnectors
• AdminChannelUsers
• Anonymous

6). What is the default Weblogic provided domain template file name and location?

• Wls.jar is the default domain template and the location is

• WL_HOMEcommontemplatesdomains

7).What are the elements of the Administration console?

• Change Center
• Domain Structure
• How do I…
• Tool Bar
• Breadcrumb Navigation
• System Status

8). What are the Node elements of the Administration console or Domain Structure?

• Environment (Servers, Clusters, Virtual Hosts, Migratable Targets,  Machines …)
• Deployment
• Services (Messaging, JDBC, Persistent Store, JTA, File T3, jCOM …)
• Security Realms
• Interoperability
• Diagnostics (Log Files, Diagnostics Modules, Diagnostics Images, Archives, Context)

9). What are the Tool Bar elements in Weblogic?

• Welcome Message
• Connected to
• Home
• Log Out
• Preferences
• Record
• Help
• Search

10). How will you enable the Administration Console?

By default, the Administration Console is enabled. If you disable it, you can re-enable it using the WebLogic Scripting Tool (WLST).

Start the Administration Server, then invoke WLST and use the following commands:

Using WLST to Re-enable the Console 

connect(“username”,”password”)

edit()

startEdit()

cmo.setConsoleEnabled(true)

save()

activate()

The following attribute(s) have been changed on MBeans which require server re-start.MBean Changed : com.bea:Name=mydomain,Type=Domain Attributes changed : 

ConsoleEnabled

Activation complete

ddisconnect()

exit()

http://interviewquestionsanswerspdf.com/2014/03/weblogic-interview-questions-and-answers/