100 Important IBM WebSphere Application Server 6.1 Interview Question Answer Part-10

QUESTION 91
What are the three possible modes that the replication service instance can be set up to run in?

1. Server mode
2. Client mode
3. Both mode
4. Publish/Subscribe mode
5. Event Listener mode
6. Broadcast mode

Answer: A, B, C

QUESTION 92
What has to be configured to implement memory-to-memory HTTP Session persistence?

1. EJB session beans and EJB Container
2. The HTTP Plug-in and embedded HTTP Server
3. The JMS Server and Queue Manager
4. The Data Replication Service (DRS) and Web container

Answer: D

QUESTION 93
An administrator is configuring JDBC database connections. Where is the file system path to the DB2 or Oracle driver .zip files specified?

1. Within the .ear file of the deployed application
2. Within the connection pool parameters for the cell
3. On the connection manager J2C configuration panel
4. From the Environment -> WebSphere Variables panel of the Administration Console

Answer: D

QUESTION 94
While an administrator is using the Tivoli Performance Viewer to analyze a performance problem with a production application server, the administrator notes that the database connection pools have a much lower percentage of utilization than the other pools. Which statement explains this observation?

1. The database server is constrained, causing calls to the database to consume more resources than are available for processing
2. This condition indicates there is a bottleneck in one of the processes upstream in the pipeline of process flows within the application server.
3. The connection pools have not been defined to account for parallel application server calls to the database, causing this particular server to show low utilization
4. The Tivoli Performance Viewer percentages are only useful for performing performance analysis on a server that is executing in a controlled load test scenario.

Answer: B



QUESTION 95
A J2EE application needs to be configured as follows:
The EJB module and the utility JAR in the application must be loaded by the same Class loader.
Each Web module must have its own unique Class loader.
What is the correct application server and Web module Class loader configuration for this application?

1. Isolation policy -> Single, Class loader policy -> Application
2. Isolation policy -> Single, Class loader policy ->Module
3. Isolation policy -> Multiple, Class loader policy -> Module
4. Isolation policy -> Multiple, Class loader policy -> Application

Answer: C

QUESTION 96
Which statement most accurately describes the effect of increasing the JVM maximum heap size?

1. No measurable performance change will result from increasing the heap size
2. A larger heap size will cause the server to take longer to start
3. More objects will be created and the time required to garbage collect will decrease.
4. The time between garbage collections will increase, but the garbage collection will take longer.

Answer: D

QUESTION 97
For security reasons, an administrator would like to ensure that HTML resources are isolated between Web modules running on a server. Which setting should the administrator configure?

1. Class loader configuration
2. Virtual host configuration
3. HTTPS ports configuration
4. Admin console configuration

Answer: B

QUESTION 98
In order to generate a plug-in configuration file on which all applications in the cell are mapped, which action must a system administrator take?

1. Run the GenPluginCfg command on each server
2. Run the GenPluginCfg command on the deployment manager
3. Select the Automatically Generate Plug-in  option in the administrative console
4. Select the Generate Plug-in option in the Web server’s page in the administrative console

Answer: B



QUESTION 99
When using the Tivoli Performance Viewer, the WebSphere administrator notes that the Summary and Detailed reports display in tabular format, however the graphics do not display. What must the administrator do to correct the problem?

1. The graphics display only if there is sufficient variance in the data being collected. The application server monitored is not under load condition, therefore the default reports are the preferred display mechanism and no action is required.
2. The Performance Monitoring Interface and the Performance Advisor must both be enabled from the Administrative Console accessed through the Deployment Manager in order for the Performance Advisor graphics to display.
3. The administrator must override the default scale set in the default report since it is set too high to cause the graphics to be generated
4. The Scalable Vector Graphics (SVG) plug-in for Adobe must be downloaded and installed on the administrators browser since this is required for the graphics display.

Answer: D

QUESTION 100
According to the Upstream Queuing model for performance tuning, what reflects the correct application of recommended settings for maximum concurrent clients?

1. Web server=75, Web container=75, Datasource=25
2. Web server=75, Web container=50, Datasource=25
3. Web server=50, Web container=50, Datasource=50
4. Web server=25, Web container=50, Datasource=75

Answer: B