100 Important IBM WebSphere Application Server 6.1 Interview Question Answer Part-2

QUESTION 11
An application server is using data source connections being managed thru connection pooling.How ever, the server is logging database errors resulting from lack of connections. In this context, what applies to tuning database connections?

1. Data sources are abstracted from the JDBC drivers to permit database upgrades without impacting the application logic. The administrator should decrease the connection timeout value.
2. The connection pool is managed by the application server container, so in addition to increasing the connection setting, additional connections allowed must be configured on the database.
3. The data sources are released at the end of the commit phase when using Type 4 JDBC drivers. New  connections will be created upon the next database access.
4. It is necessary to tune the applications before tuning WebSphere application server. Connections not returned to the pool are often caused by programs not closing connections properly.

Answer: D

QUESTION 12
Which set of parameters can a system administrator adjust to directly improve performance for the EJB container?

1. Transaction lifetime and client inactivity timeout
2. Cache size and cache cleanup interval
3. Data source connection pool and server JVM size
4. Session timeout and HTTP session object size

Answer: B

QUESTION 13
When altering the level of logging information, which level provides more detailed logging information than the default (info) level ?

1. Fatal
2. Warning
3. Severe
4. Config

Answer: D

QUESTION 14
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. Web module WAR1 and the EJB module must use the same Class loader and Webmodule WAR2 must have its own Class loader.
What is the correct Web module Class loader configuration for this application?

1. WAR1 – Module, WAR2 – Module
2. WAR1 – Module, WAR2 – Application
3. WAR1 – Application, WAR2 – Application
4. WAR1 – Application, WAR2 – Module

Answer: D

QUESTION 15
Which Web module parameter adjustments would result in improved response time for  Web clients ?

1. Disable load on startup
2. Enable pre-compile JSP option
3. Set the distributable flag
4. Set the reload interval to 20 seconds or less

Answer: B

QUESTION 16
Which Web server plug-in setting is NOT configurable using the administrative console?

1. Load balancing option
2. Retry interval
3. Refresh configuration interval
4. Minimum number of connections

Answer: D

QUESTION 17
An application has 15 concurrent users and a connection pool size of 10. Each user users 3 prepared statements. For this application, what is the recommended prepared statement cache size?

1. 10
2. 15
3. 30
4. 45

Answer: C

QUESTION 18
What is the correct syntax when running the backup configuration of administrative server files when WebSphere Security is enabled?

1. backupConfig  WebSphereConfig user <name> -password <password>
2. backupConfig  WebSphereConfig backup.zip nohalt user <name> -password <password>
3. backupConfig  WebSphereConfig –cell user <name> -password <password>
4. backupConfig  WebSphereConfig profilename=AppSrv01 user <name> -password <password>

Answer: A

QUESTION 19
When the application server is experiencing normal to heavy usage, which statement most accurately describes optimal pool usage?

1. The pools will all show similar numerical values, indicating balanced workload is occurring throughout the application server.
2. Pools used by the application should be released and rebuilt in conjunction with JVM garbage collection cycles ensuring that no state connections persist.
3. The performance Management Interface (PMI) must be explicitly enabled on the application server to be monitored, since it requires CPU resources on the server being monitored.
4. Pools used by the application should be nearly fully utilized, indicating that resources are being efficiently used.

Answer: D

QUESTION 20
When configuring a J2C connection factory, which setting can be configured using the administrative console ?

1. Container-managed authentication alias
2. Component-managed authentication alias
3. Authentication preference
4. Mapping configuration alias

Answer: B