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IBM A2090-421 Exam Syllabus Topics:

IBM Assessment: InfoSphere DataStage v8.5 Sample Questions:

1. Which condition is required to use the LastRowInGroup() function to determine a key break on a field?

A) The input data has to be sorted by the key field, but it is not required that DataStage be able to detect this. For example, the input data might be sorted before it is input to the job. (However, the job will abort at runtime if the data isn't sorted.)
B) The input data has to be sorted by the key field and DataStage must be able to detect that the data is sorted, for example, by the presence of a Sort stage.
C) The LastRowInGroup() function does not require the data to be either sorted or grouped by the key field. If necessary the LastRowInGroup() function will perform a sort.
D) The LastRowInGroup() function requires the data to be grouped by the key field, but the data does not have to be sorted.

2. Which two statements are true about project-level configuration for National Language Support (NLS)? (Select two)

A) Change the Parallel job project map.
B) Choose NVarChar for string fields.
C) Choose appropriate NLS map in the stage property.
D) Change the Parallel job project locale.

3. You would like to invoke a job sequence from a web service. How can this be done?

A) Check the use job sequence checkbox when creating the web service.
B) Select the job sequence when creating the web service operation,
C) Invoke the job sequence using the dsjob command.
D) Create a DataStage routine that invokes the job sequence and invoke the routine from a DataStage job. Then use this job when creating the web service operation.

4. A 100MB input dataset has even distribution across 400 unique key values.
When run with a 4-node configuration file, which two changes could improve sort performance in this scenario? (Select two)

A) Convert all numeric fields to varchars.
B) Alter the Sort stage properties to perform a stable sort.
C) Set $APT_TSORT_STRESS_BLOCKSIZE to 50M
D) Specify "Restrict Memory Usage" to 60MB on the Sort stage properties.
E) Specify Round Robin partitioning on the input link to the Sort stage.

5. Which three data types can the ODBC Enterprise stage handle? (Choose three.)

A) SQL_TIMESTAMP
B) SQL_SMALLDATETIME
C) SQL_CLOB
D) SQL_BIGINT
E) SQL_VARBINARY

Solutions: