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IDQ Interview Questions

IDQ Interview Question And Answers:

Q.What is the difference between the Power Center Integration Service and the Data Integration Service? 

The Power Center Integration Service is an application service that runs sessions and workflows.
The Data Integration Service is an application service that performs data integration tasks for the Analyst tool,the Developer tool, and external clients. The Analyst tool and the Developer tool send data integration task requests to the Data Integration Service to preview or run data profiles, SQL data services, and mappings. Commands from the command line or an external client send data integration task requests to the Data Integration Service to run SQL data services or web services.


Q.What is the difference between the PowerCenter Repository Service and the Model Repository Service?

The PowerCenter application services and PowerCenter application clients use the PowerCenter Repository Service. The PowerCenter repository has folder-based security.

The other application services, such as the Data Integration Service, Analyst Service, Developer tool, and Analyst tool, use the Model Repository Service. The Model Repository Service has project-based security.
You can migrate some Model repository objects to the PowerCenter repository.


What is the difference between a mapplet in PowerCenter and a mapplet in the Developer tool? 

  1. Mapplet in PowerCenter and in the Developer tool is a reusable object that contains a set of transformations. You can reuse the transformation logic in multiple mappings. 
  2. PowerCenter mapplet can contain source definitions or Input transformations as the mapplet input.  It must contain Output transformations as the mapplet output. 
  3. Developer tool mapplet can contain data objects or Input transformations as the mapplet input.  It can contain data objects or Output transformations as the mapplet output. 

 A mapping in the Developer tool also includes the following features:

  1. You can validate a mapplet as a rule. 
  2. You use a rule in a profile. 
  3. A mapplet can contain other mapplets. 

Q.What is the difference between a mapplet and a rule? 

You can validate a mapplet as a rule. A rule is business logic that defines conditions applied to source data when you run a profile. You can validate a mapplet as a rule when the mapplet meets the following requirements: 

  1. It contains an Input and Output transformation. 
  2. The mapplet does not contain active transformations. 
  3. It does not specify cardinality between input groups. 

Q.What is the difference between a source and target in PowerCenter and a physical data object in the Developer tool? 

In PowerCenter, you create a source definition to include as a mapping source. You create a target definition to include as a mapping target. In the Developer tool, you create a physical data object that you can use as a mapping source or target.


Q.What is the difference between the PowerCenter Repository Service and the Model Repository Service? 

The PowerCenter application services and PowerCenter application clients use the PowerCenter Repository Service. The PowerCenter repository has folder-based security. The other application services, such as the Data Integration Service, Analyst Service, Developer tool, and Analyst tool, use the Model Repository Service. The Model Repository Service has project-based security. You can migrate some Model repository objects to the PowerCenter repository.


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