Informatica Interview Questions and Answers
Experienced / Expert level questions & answers
Ques 1. Differentiate between static and dynamic cache in Informatica.
Static cache is populated at the beginning of a session and does not change during the session, while dynamic cache can be updated during the session.
Ques 2. What is a Constraint-based Loading Order in Informatica?
Constraint-based loading order in Informatica ensures that data is loaded into the target in a specific order based on defined constraints between transformations.
Ques 3. How is Incremental Aggregation achieved in Informatica?
Incremental Aggregation in Informatica involves updating only the changed or new records in the source, reducing the processing load.
Ques 4. Explain the concept of a Dynamic Lookup Cache.
A Dynamic Lookup Cache in Informatica is created at runtime and allows the addition of new entries during the session.
Ques 5. What is a Persistent Cache in Informatica?
A Persistent Cache in Informatica is a type of cache that is stored on disk and can be reused across sessions, providing improved performance.
Ques 6. Explain the concept of a Data-driven session in Informatica.
In a Data-driven session in Informatica, the session properties and mappings are determined at runtime based on metadata, allowing dynamic control of the ETL process.
Ques 7. What is the purpose of a Unconnected Stored Procedure transformation?
The Unconnected Stored Procedure transformation in Informatica is used to execute stored procedures that are not connected to the pipeline and do not return a value.
Ques 8. Explain the concept of a Dynamic Partitioning in Informatica.
Dynamic Partitioning in Informatica allows the Informatica server to dynamically determine the number of partitions based on the available system resources.
Ques 9. What is a Lookup Override in Informatica?
A Lookup Override in Informatica allows you to override the default SQL query generated by the Lookup transformation to customize data retrieval.
Ques 10. Explain the concept of a Source Filter in Informatica.
A Source Filter in Informatica is used to filter rows at the source database level before they are read by the source qualifier, optimizing data extraction.
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