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IBM Assessment: IBM InfoSphere DataStage v9.1 Assessment Sample Questions:

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

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

2. You are editing the configuration file. Which statement is true about file system efficiency?

A) In a clustered environment where NAS is used for a common storage, you must specify the internal disk for scratch disk.
B) Creating scratch disk spaces on an internal disk rather than on an NFS drive improves sort performance.
C) For the resource disk, it is best to use the partition where the engine is installed.
D) Using multiple scratch spaces in a logical node improves performance.

3. In a Transformer expression for a stage variable, there is a nullable input column. Assume the legacy NULL processing option is turned off. What happens when a row is processed that contains NULL in that input column?

A) The job aborts.
B) The row is rejected.
C) The value written to the stage variable is undetermined.
D) NULL is written to the stage variable.

4. In your job you are using a Sequential File stage as a source. You have decided to use a schema file as an alternative way of specifying column definitions and record format properties. What two items are true in configuring this stage in your parallel job? (Choose two.)

A) Configure the APT_SEQFILE_HASSCHEMA property with the schema file path.
B) Configure the column tab with one column named 'Input'.
C) Enable Run Time Column propagation.
D) Enable Run Time Schema propagation.
E) Configure the Schema File property with the path of the schema file definition.

5. What are the two Transfer Protocol Transfer Mode property options for the FTP Enterprise stage? (Choose two.)

A) RFTP
B) TFTP
C) SFTP
D) EFTP
E) FTP

Solutions: