Red Hat JBoss Enterprise Application Platform Administration I

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Quiz: Exploring Clustered Applications

Exploring Clustered Applications

In managed domain mode, a cluster is actually a collection of servers in a server group, with each server in the server group representing the nodes of the cluster:

Choose the correct answer to the following questions based on the diagram of clustered servers in a managed domain:


  1. 1.

    How many server groups are in this domain? (Choose one.)

    A

    One

    B

    Two

    C

    Three

    D

    Four

    E

    None

  2. 2.

    How many servers are in Server-Group1? (Choose one.)

    A

    One

    B

    Two

    C

    Three

    D

    Four

    E

    None

  3. 3.

    If a <distributable/> application is deployed onto Server-Group1, and Server-Group1 uses the ha profile, then does that create a cluster between serverA, serverC, and serverF? (Choose one.)

    A

    Yes. When the distributable application is deployed onto the server group, they automatically create a cluster.

    B

    Yes. But the clustering needs to be manually enabled on the server side.

    C

    No. The server needs additional configuration on the *-ha profile.

    D

    No. The application needs to be deployed onto an individual server, not a server group.

  4. 4.

    Suppose app1 is deployed onto Server-Group1, app3 is deployed onto Server-Group3, and both applications are <distributable/>. What happens to these applications if node 3 fails? (Choose one.)

    A

    Both applications return errors to users.

    B

    app1 continues working by failing over to serverA and serverC. app3 fails because it is not in a cluster and has no available servers.

    C

    The serverA and serverC instances are still up and running, so requests to app1 fail over to either one of them. Similarly, serverD and serverE handle the failover of requests sent to app3.

    D

    app3 continues working by failing over to serverE and serverD. app1 fails because it is not in a cluster and has no available servers.

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