Wednesday, 4 February 2015

Technical Round AB Initio Interview Questions and Answers (Part3)

11. What can we say about the Scan component versus a RollUp component?
Scan components make a total series of records while RollUp components summarize groups of data records.

12. What are the supported layouts in Ab Initio?
The supported layouts are the serial and the parallel and a graph can include them both. The parallel layouts is related to the parallelism degree.

13. What is the definition of a multistage component?
It is a transform component in which we find different packages.

14. What can we say about partitioning with key and round robin?
The partitioning with key (also called hash partition) is partitioning method used when we have diverse keys. The technique is used basically in the processing of parallel data. On the other hand round robin partitioning is a technique that allows us to distribute the data on every destination partition uniformly. While in the case of partitioning with key we can have large data skew due to large key volume, in the case of using round robin partitioning the skew is zero.

15. What is the role of a driving port?
Driving port is usually meant for graph performance enhancement.
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