000-253 dernières questions d'examen certification IBM et réponses publiés

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Code d'Examen: 000-253
Nom d'Examen: IBM (IBM WebSphere Application Server Network Deployment V6.1, Core Administration)
Questions et réponses: 108 Q&As

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NO.1 What functionality does the Caching Proxy server provide?
A. Reverse proxy and content-based routing
B. Dynamic content caching and integration with servlet caching
C. File serving enabler
D. HTTP compression
E. Integration with Dynacache and third party object caches
Answer:AB

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NO.2 In a WebSphere cell configuration, which component is a single point of failure?
A. Deployment manager
B. Web container
C. EJB container
D. HTTP server
Answer:A

IBM   000-253   000-253   000-253   000-253

NO.3 Which approach should be recommended when designing a production topology for WebSphere
application servers providing high availability and failover capabilities?
A. Create a design using multiple machines that handle the full production load, enabling the use of
application server clustering to provide failover capabilities
B. Utilize load balancers between the Web servers and the application servers to provide failover support
at the application server tier
C. Place the Authentication servers outside of the intrusion firewall with the Web servers, since the Web
servers will need to access them
D. Use the largest processor engines and least number of physical machines for the application server
tier, to minimize the software licensing costs
Answer:A

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NO.4 What is needed to load balance the HTTP traffic across a cluster of Web servers?
A. Configure a proxy server such as Tivoli Access Manager (TAM)
B. Enable server affinity for each HTTP server in the cluster
C. Implement the caching proxy server component of the WebSphere Edge
D. Use an IP sprayer from the load balancing component of the WebSphere Edge Components
Answer: D

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NO.5 Which Web module parameter adjustments would result in improved response time for Web clients?
A. Disable load on startup
B. Enable pre-compile JSP option
C. Set the distributable flag
D. Set the reload interval to 20 seconds or less
Answer: B

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NO.6 Session Initiation Protocol (SIP) servlets are packaged in which type of archive file?
A. SAR
B. WAR
C. JAR
D. EJB-JAR
E. SIP-JAR
Answer:A

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NO.7 What does a WebSphere application server provide to support the installation and deployment of JSR
168 compliant portlets?
A. An embedded portlet container
B. A scaled-down version of the WebSphere Portal Server
C. Several J2EE applications that render and aggregate portlets in a browser
D. An embedded version of WebSphere Portal Express
Answer:A

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NO.8 A cluster member has suddenly crashed. The administrator is concerned about aborted transactions
holding locks in the database. What can an administrator do to release the locks?
A. Unmount the shared file system such as a Network Attached Storage (NAS) where the transaction log
is stored
B. Restart the deployment manager and node agents who manage the transaction log
C. Verify another running cluster member has access to the transaction log
D. Reconnect the database where the transaction log is stored
Answer: C

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NO.9 When altering the level of logging information, which level provides more detailed logging information
thanthe default (info) level?
A. Fatal
B. Warning
C. Severe
D. Config
Answer: D

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NO.10 When the application server is experiencing normal to heavy usage, which statement most accurately
describes optimal pool usage?
A. The pools will all show similar numerical values, indicating balanced workload is occurring throughout
the application server.
B. Pools used by the application should be released and rebuilt in conjunction with JVM garbage
collection cycles ensuring that no stale connections persist.
C. 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.
D. Pools used by the application should be nearly fully utilized, indicating that resources are being
efficiently used.
Answer: D

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NO.11 Which two components provide workload management capabilities?
A. Node agent
B. Web server plug-in
C. Caching proxy
D. Deployment manager
E. Load balancer
Answer: BE

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NO.12 Which set of parameters can a system administrator adjust to directly improve performance for the
EJB container?
A. Transaction lifetime and client inactivity timeout
B. Cache size and cache cleanup interval
C. Data source connection pool and server JVM size
D. Session timeout and HTTP session object size
Answer: B

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NO.13 What is the correct syntax when running the backup configuration of administrative server files when
WebSphere Security is enabled?
A. backupConfig WebSphereConfig user <name> -password <password>
B. backupConfig WebSphereConfig backup.zip nohalt user <name> -password <password>
C. backupConfig WebSphereConfig -cell user <name> -password <password>
D. backupConfig WebSphereConfig profilename=AppSrv01 user <name> -password <password>
Answer:A

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NO.14 If an administrator configures session management for an application server to use SSL ID tracking,
which two other session tracking mechanisms should also be enabled?
A. Cookies
B. URL Rewriting
C. Security Integration
D. Serial Access
E. Java2 Security
Answer:AB

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NO.15 An application server is using data source connections being managed thru connection pooling.
However, the server is logging database errors resulting from lack of connections. In this context, what
applies to tuning database connections?
A. 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.
B. 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.
C. 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.
D. 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

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NO.16 An application has 15 concurrent users and a connection pool size of 10. Each user uses 3 prepared
statements. For this application, what is the recommended prepared statement cache size?
A. 10
B. 15
C. 30
D. 45
Answer: C

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NO.17 Which services are implemented by the WebSphere application server?
A. Security, JMS messaging, Naming and HTTP Plug-in
B. The user registry, Naming and HTTP Plug-in
C. HTTP Load Balancing service, JMS messaging and Data Replication Service (DRS)
D. Security, Naming, Transaction and Dynamic Cache
Answer: D

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NO.18 Which Web server plug-in setting is NOT configurable using the administrative console?
A. Load balancing option
B. Retry interval
C. Refresh configuration interval
D. Minimum number of connections
Answer: D

IBM examen   000-253   000-253   000-253 examen   000-253

NO.19 When configuring a J2C connection factory, which setting can be configured using the administrative
console?
A. Container-managed authentication alias
B. Component-managed authentication alias
C. Authentication preference
D. Mapping configuration alias
Answer: B

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NO.20 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 Web module WAR2 must have its own Class loader. What is the correct Web
module Class loader configuration for this application?
A. WAR1 -Module, WAR2 -Module
B. WAR1 - Module, WAR2 - Application
C. WAR1 - Application, WAR2 - Application
D. WAR1 - Application, WAR2
Module
Answer: D

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Code d'Examen: 000-253

Nom d'Examen: IBM (IBM WebSphere Application Server Network Deployment V6.1, Core Administration)

Questions et réponses: 108 Q&As

Code d'Examen: 000-M12

Nom d'Examen: IBM (IBM Workplace Content Management)

Questions et réponses: 49 Q&As

Code d'Examen: 000-994

Nom d'Examen: IBM (IBM WebSphere MQ V6.0,System Administration)

Questions et réponses: 104 Q&As

Code d'Examen: 000-415

Nom d'Examen: IBM (IBM WebSphere IIS DataStage Enterprise Edition v7.5)

Questions et réponses: 158 Q&As

Code d'Examen: 000-996

Nom d'Examen: IBM (IBM WebSphere MQ.V6.0.Solution Design)

Questions et réponses: 49 Q&As

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NO.1 Which three are valid ways within a Job Sequence to pass parameters to Activity stages?
(Choose three.)
A.Routine Activity stage
B.Sequencer Activity stage
C.UserVariables Activity stage
D.ExecCommand Activity stage
E.Nested Condition Activity stage
Correct:A C D

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NO.2 Which statement about job parameter usage is true?
A.You can use environment variables to set parameter values linked to the Job Sequence.
B.You can change the parameter values in an initialization file linked to a Job Sequence .ini file.
C.Changes to the job parameters in the Designer do not require a recompile to be applied to the job.
D.You can change job parameters while a job is running and the changes will immediately be applied
mid-job.
Correct:A

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NO.3 Job run details for a specific invocation of a multi-instance job can be viewed by which two
clients? (Choose two.)
A.dsjob
B.dsjobinfo
C.DataStage Director
D.DataStage Manager
Correct:A C

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NO.4 Which command can be used to execute DataStage jobs from a UNIX shell script?
A.osh
B.dsjob
C.DSRunJob
D.DSExecute
Correct:B

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NO.5 What is the purpose of the uv command in a UNIX DataStage server?
A.Start and stop the DataStage engine.
B.Report DataStage client connections.
C.Cleanup resources from a failed DataStage job.
D.Provide read access to a DataStage EE configuration file.
Correct:A

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NO.6 An XML file is being processed by the XML Input stage. How can repetition elements be
identified on the stage?
A.Set the "Key" property for the column on the output link to "Yes".
B.Check the "Repetition Element Required" box on the output link tab.
C.Set the "Nullable" property for the column on the output link to "Yes".
D.No special settings are required. XML Input stage automatically detects the repetition element from the
XPath expression.
Correct:A

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NO.7 Which two statements are true of the column data types used in Orchestrate schemas? (Choose
two.)
A.Examples of Orchestrate schema column data types are varchar and integer.
B.Examples of Orchestrate schema column data types are int32 and string [max=30].
C.Orchestrate schema column data types are the same as those used in DataStage stages.
D.OSH import operators are needed to convert data read from sequential files into schema types.
Correct:B D

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NO.8 Which statement describes a process for capturing a COBOL copybook from a z/OS system?
A.Select the COBOL copybook using the Browse button and capture the COBOL copybook with Manager.
B.FTP the COBOL copybook to the client workstation in binary and capture the metadata through
Manager.
C.FTP the COBOL copybook to the client workstation in text mode and capture the copybook with
Manager.
D.FTP the COBOL copybook to the server platform in text mode and capture the metadata through
Manager.
Correct:C

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NO.9 In which two scenarios should a sparse lookup be used in place of a normal lookup to retrieve
data from an Oracle database? (Choose two.)
A.When the Oracle database is on the same system as the DataStage server.
B.When the number of input rows is significantly larger than the number of rows in the lookup table.
C.When the number of input rows is significantly smaller than the number of rows in the lookup table.
D.A database function that returns the current value of an Oracle object is required as part of the result set.
Correct:C D

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NO.10 Which two statements about performance tuning a DataStage EE environment are true?
(Choose two.)
A.Overall job design has a minimal impact in actual real-world performance.
B.Only adjust buffer tuning parameters after examining other performance factors.
C.A single, optimized configuration file will yield best performance for all jobs and be easier to administer.
D.Performance tuning is an iterative process - adjust one item at a time and examine the results in
isolation.
Correct:B D

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NO.11 Which statement is true about Aggregator Sort and Hash methods when the
APT_NO_SORT_INSERTION environment variable is set to TRUE?
A.If you select the Hash method, the Aggregator stage requires the data to have the partition sorted by
the group key.
B.If you select the Sort method, the Aggregator stage requires the data to have been partition sorted by
the group key.
C.If you select the Sort method, the Aggregator stage will partition sort the data by the group key before
performing the aggregation.
D.If you select the Hash method, the Aggregator stage will partition sort the data by the group key before
building a hash table in memory.
Correct:B

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NO.12 Which two tasks will create DataStage projects? (Choose two.)
A.Install the DataStage engine.
B.Copy a project in DataStage Administrator.
C.Add new projects from DataStage Administrator.
D.Export and import a DataStage project from DataStage Manager.
Correct:A C

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NO.13 Which two can be implemented in a Job Sequence using job parameters? (Choose two.)
A.All options of the Start Loop Activity stage.
B.Name of a job to be executed by a Job Activity stage.
C.A command to be executed by a Routine Activity stage.
D.The body of the email notification activity using the user interface.
Correct:A C

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NO.14 Click the Task button. You have been asked to improve the performance of a job. A consultant
has convinced your manager that sorts and partitions are major contributors to the performance
issues being experienced since they are specified as "auto". Both the aggregation and join are
done on Zip (postal) code. Place the appropriate sort/aggregation specifications on the links.
Correct:
Green choice2---->Yellow Choice1
Green choice1---->Yellow Choice2
Green choice3---->Yellow Choice3
Green choice4---->Yellow Choice4

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NO.15 Which three are valid trigger expressions in a stage in a Job Sequence? (Choose three.)
A.Unconditional
B.Equality(Conditional)
C.Custom(Conditional)
D.Difference(Conditional)
E.ReturnValue(Conditional)
Correct:A C E

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NO.16 A job has two input sources that need to be combined. Each input source exceeds available
physical memory. The files are in the same format and must be combined using a key value. It is
guaranteed that there will be at least one match. Given the above scenario, which stage would
consume the least amount of physical memory?
A.Merge
B.Funnel
C.Lookup
D.Transformer
Correct:A

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NO.17 How does a Join stage process an Inner join?
A.It transfers records from the input data sets whose key columns contain equal values to the output data
set.
B.It transfers all values from the left data set but transfers values from the right data set and intermediate
data sets only when key columns match.
C.It transfers all values from the right data set and transfers values from the left data set and intermediate
data sets only where key columns match.
D.It transfers records in which the contents of the key columns are equal from the left and right input data
sets to the output data set. It also transfers records whose key columns contain unequal values from both
input data sets to the output data set.
Correct:A

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NO.18 Establishing a consistent naming standard for link names is useful in which two ways?
(Choose two.)
A.using less memory at job runtime
B.specifying link order without having to specify stage properties to generate correct results
C.improving developer productivity and quality by distinguishing link names within stage editors
D.easing use of captured job statistics (eg. row counts in an XML file) by processes or users outside of
DataStage
Correct:C D

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NO.19 The last two steps of a job are an Aggregator stage using the Hash method and a Sequential File
stage with a Collector type of Auto that creates a comma delimited output file for use by a
common spreadsheet program. The job runs a long time because data volumes have increased.
Which two changes would improve performance? (Choose two.)
A.Change the Sequential stage to use a Sort Merge collector on the aggregation keys.
B.Change the Sequential stage to a Data Set stage to allow the write to occur in parallel.
C.Change the Aggregator stage to use the sort method. Hash and sort on the aggregation keys.
D.Change the Aggregator stage to a Transformer stage and use stage variables to accumulate the
aggregations.
Correct:A C

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NO.20 A customer is interested in selecting the right RDBMS environment to run DataStage
Enterprise Edition to solve a multi-file and relational database data merge. The customer realizes
the value of running in parallel and is interested in knowing which RDBMS stage will match the
internal data partitioning of a given RDBMS. Which RDBMS stage will satisfy the customer's
request?
A.ODBC Enterprise
B.Oracle Enterprise
C.Sybase Enterprise
D.DB2/UDB Enterprise
Correct:D

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