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  5. Oracle WebLogic Server 12c Essentials Questions and Answers

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Questions # 1:

A web application is bound to the context named "/webapp" and the client uses the browser and makes a request to the resource http://server:port/webapp/ctxl/resource.

Where do you place this resource inside the web application structure?

Options:
A.

in the subdirectory /WEB-INF/ctxl

B.

in the subdirectory /META-INF/ctxl

C.

in the subdirectory /ctxl in the root of the archive

D.

in the subdirectory /ctxl/resource in the root of the archive

E.

in the root of the archive

Questions # 2:

A customer claims that while redeploying a web application in the production system all their customers have to log in again. What do you recommend?

Options:
A.

Sessions can't be preserved when redeploying applications. The customer needs to consider redeployment during late nights when the traffic is low.

B.

Change the flag responsible for the development mode of their environment. In the production mode, all sessions are preserved while redeploying application.

C.

Change Hotspot to JRockit. Sessions can't be preserved on HotSpot when redeploying application.

D.

Use flag -version when redeploying the application. This will switch on the Side By Side deployment feature and preserve existing sessions.

E.

Open a service request with Oracle Support. This is unexpected behavior. Sessions are preserved without any extra settings.

Questions # 3:

Identify three reasons that explain why assigning more than one managed serve achieve better performance than running one managed server with more resources?

Options:
A.

Thread management inside the JVM process might be less effective than context switching between processes on the OS level. It is better to combine both these technologies to achieve full saturation of resources.

B.

Current CPUs are multicore units. So starting managed servers in the amount of physical cores and pinning them 1:1 to cores will always get the best performance.

C.

By a combination of prioritization of processes on the OS level and Work Manager in WLS, one could tune the whole environment more precisely.

D.

Assigning more than one managed server to hardware will never bring better performance.

E.

More instances means more connections to databases, so one could serve more concurrent calls on the database level. This is primarily why this approach will give better performance numbers.

F.

Depending on the profile of the application, having more JVMs with smaller heaps will lead to more predictable response times than fewer JVMs with a large heap.

Questions # 4:

An airline is building a booking system for its premium and general customers. The goal is to ensure premium members are given higher access priority when user traffic is high.

What configuration will achieve this goal?

Options:
A.

Configure a Work Manager for premium users with a Minimum Thread Constraint.

B.

Configure a Work Manager for premium users with a higher fair-share-request-class.

C.

Configure a Work Manager for premium users with a higher response-time-request-class.

D.

Configure a Work Manager general users with a Maximum Thread Constraint.

E.

Configure a Work Manager for premium users with a custom request-class.

Questions # 5:

You installed WebLogic, SOA Suite, and Oracle Service Bus on a machine and want to use the WebLogic Node Manger to start servers for each product. Which statement is true?

Options:
A.

You need to install a separate node manager for each Middleware Home that has a unique major and minor WebLogic Version Number.

B.

You need to install and configure only one instance of Node Manager for all products, regardless of the WebLogic version number.

C.

You need to install and configure a separate Node Manager for each domain of each product you want to run on the machine.

D.

You need to install one Node Manager but use separate SSL certificates for each product when searching the network communication to the machine

Questions # 6:

Which new key architectural element introduced in WebLogic Server l2c should you take advantage of when designing Disaster Recovery Centers with active - passive mode?

Options:
A.

MAN Clusters, because they would allow you to synchronously replicate state in low latency networks

B.

WAN Clusters, because they would allow you to asynchronously replicate state in nonlow latency networks.

C.

Transaction Log in the database, because you could avoid synchronizing two replication technologies (database and file)

D.

Data Guard, because it is the most effective way to replicate a state across locations

E.

GoldenGate, because it is the most effective way to replicate a state across locations

Questions # 7:

An application that needs to use a shared library has a deployment descriptor that only specifies the Specification-Version and Extension-Name of the shared library. When the application is deployed, which shared library will be used?

Options:
A.

The application will go into an ADMIN state and fail to deploy because the Implementation-Version is required.

B.

The application will be deployed but the classes in the shared library will not be available.

C.

If you are using the WebLogic Admin Console, you will be prompted for the version you want to use; otherwise, the application will fail to deploy.

D.

If there are multiple versions of the shared library deployed, WebLogic will use the one with the highest Implementation-Version.

E.

If there are multiple versions of the shared library deployed, WebLogic will use the one that was deployed most recently.

Questions # 8:

Identify three components of the WebLogic JMS architecture.

Options:
A.

JMS Server

B.

JMS Module

C.

Node Manager

D.

Queue Manager

E.

Persistent Store

Questions # 9:

You deploy two different applications to the WebLogic container. One application use Xerces parser version A and the other application uses Xerces parser version B. Both these versions are different from the parser version that the WebLogic server uses internally. You want to use the Filtering Classloader feature to solve this problem. What action would you take to generate proper filtering Classloader entries?

Options:
A.

Modify the applications to use the same version that WebLogic uses internally.

B.

Based on available examples of Filtering Classloader entries, try to modify get the proper entries.

C.

Deploy and use the Classloader Analyzing Tool to resolve all conflicts with conflicting libraries. This tool will generate all proper entries.

D.

Split the application into separate WebLogic containers and use different WLS versions of Xerces but identical that applications require.

E.

Look for a WebLogic release that uses the same version of Xerces that the applications use.

Questions # 10:

WebLogic 12c, the Maven plug-in has been enhanced with which Maven goal?

Options:
A.

wls:unzip, wls:install-domain, wls:start-domain, wls:wlst, wls:appc

B.

wls:install, wls:install-domain, wls:start-domain, wls:wlst, wls:appc

C.

wls:unzip, wls:create-domain, wls:start-domain, wls:wlst, wls:appc

D.

wls:install, wls:create-domain, wls:start-server, wls:wlst, wls:appc:

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