QUESTION: 61

An administrator configures an IBM DB2data source at cell scope. The environment variable DB2UNIVERSAL_JDBC_DRIVER_PATH is configured at cluster scope. The data source test connection on one node succeeds, but fails on the other node with java.lang.ClassNotFoundException:com.ibm.db2.jcc.DB2ConnectionPoolDataSource.

Which of the below is the likely cause for the exception?

The data source is configured at cell scope.
Multiple driver JARs are installed on the second node.
DB2UNIVERSAL_JDBC_DRIVER_PATH is configured at cluster scope.
A different version of the JDBC driver JAR does not exist on the second node.

Answer(s): C

Explanation:

Check that the variable is correctly defined at the scope where the JDBCProvider/DataSource is defined.

Note: At runtime, WebSphere Application Server invokes a physical data source by resolving the appropriate variable at a level where one of the following criteria exists:
The scope of the variable can contain the data source configuration; that is, the variable has the larger scope. The variable and the data source have identical scopes.
Application Server meets these conditions by attempting to resolve the variable at each level of the scope spectrum. That is, the product tries to resolve the variable in the server scope, then the cluster scope, then the node scope, and lastly the cell scope.

Reference:

https://www.ibm.com/support/knowledgecenter/SSAW57_8.0.0/com.ibm.websphere.nd.doc/info/ae/ae/cdat_testcon.html

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QUESTION: 62

What is a prerequisite for creating a dynamic cluster?

Create and verify the service policies.
Verify that the administrator has Operator privileges.
Verify the application placement controller is enabled.
Make sure there are less than 30 core group members in the cell.

Answer(s): C

Explanation:

Verify that the application placement controller is enabled. The application placement controller is enabled by default. The application placement controller enables the autonomic capabilities of dynamic clusters.

Incorrect Answers:
B: You must have configurator administrative privileges to create a dynamic cluster.

Reference:

https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/twve_odrdynamiccluster.html

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QUESTION: 63

Which of the following gives clues when comparing traces from different processes and correlating events of different servers in the same data center?

Thread ID
Timestamp
Message ID
Exception from top of stack trace

Answer(s): B

Explanation:

Reading a Trace File Timestamps give good clues:
-Time stamps are real machine time values
-Good when comparing traces from different processes

Reference:

ftp://ftp.software.ibm.com/software/iea/content/com.ibm.iea.was_v6/waspdguide/6.0/GeneralPD/SW5706G04_Techniques.pdf, page 26

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QUESTION: 64

An administrator installed an enterprise application in fast mode and noticed that the application is failing because J2EE roles have not been mapped.

How can this issue be resolved?

Re-deploy the application.
Request that the application developer create an enhanced .ear file which has roles mapped, and deploy the enhanced .ear file.
Map a security role to the user/group for the application using the Integrated Solutions Console, save changes, and restart the application.
Map a security role to the user runAs roles for the application using the Integrated Solutions Console, save changes, and restart the application.

Answer(s): C

Explanation:

WSRR defines J2EE roles that must be mapped to user or group principals. This can be done by using the WebSphere Administration Console

Reference:

https://www.ibm.com/support/knowledgecenter/en/SSWLGF_8.5.6/com.ibm.sr.doc/twsr_configrn_userroles08.html

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