Top Informatica Interview Questions and Answers

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Informatica Interview Questions and AnswersInformatica is a popular ETL (Extract, Transform, Load) tool primarily used for developing data warehouses in various companies. Reportedly, more than 21K organizations in the United States utilize Informatica, making it one of the most sought-after career paths. It is widely utilized in diverse industries, including healthcare, finance, insurance, marketing, non-profit sectors, and others, leading to a growing demand for Informatica professionals.

If you are looking for Informatica interview questions for both experienced and fresh candidates, you’ve come to the right place. Today, numerous reputed brands and Fortune 500 companies worldwide offer plenty of opportunities for Informatica professionals. It indicates that Informatica has a progressive market share, providing you with an excellent chance to advance your career in Informatica Development.

For your convenience, we have prepared an extensive guide containing commonly asked Informatica interview questions and answers along with valuable tips to help you excel in your next Informatica Interview and secure your highly paying job.

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Informatica is a widely used ETL (Extract, Transform, Load) tool used for data integration and data warehousing projects.

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Informatica PowerCenter is available in three editions: Standard Edition, Advanced Edition, and Premium Edition.

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The Source Qualifier is a transformation used to represent the rows that the Informatica Server reads from the source database.

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Active transformations change the number of rows passing through it, while Passive transformations do not change the number of rows.

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A Lookup transformation is used to look up data in a relational table and return a related value from the same or another table.

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The types of lookup caches are Persistent Cache, Shared Cache, and Static Cache.

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The Rank transformation is used to select the top or bottom ‘n’ records based on a specified condition.

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To handle NULL values, you can use the ‘NVL’ function or configure the transformation properties to treat NULL values accordingly.

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Connected transformations are directly connected to other transformations or targets, whereas unconnected transformations are not connected and called from other transformations.

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Performance can be improved by increasing the session buffer size, using partitions, enabling pushdown optimization, etc.

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Incremental Aggregation is a method to improve session performance by processing only new or changed data since the last run.

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SCDs can be loaded using various techniques, such as using the Informatica SCD Type 1, Type 2, or Type 3 mappings.

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A Router transformation directs data rows to different target pipelines based on specified conditions, while a Filter transformation only passes rows that meet a specific condition.

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A parameter file is a text file used to store values that can be referenced from Informatica workflows.

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Informatica provides various functions like TO_CHAR, TO_DATE, TO_NUMBER to handle data type conversions.

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A workflow is a set of instructions that defines the order in which tasks and sessions are run in Informatica.

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Data partitioning is the process of dividing data into smaller subsets to be processed parallelly, improving session performance.

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A mapplet is a reusable object that represents a set of transformations and can be used in multiple mappings.

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The types of OLAP caches are Detail cache, Index cache, and Data cache.

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You can use the Command task to execute the Informatica session in a sequential batch.