Top Questions Ask at Informatica Interview Along with Their Answers

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Are you preparing for an upcoming Informatica interview? Listen out carefully! You will face intense competition in the screening test. So, you cannot get into the job without having a significant edge. And you cannot outstrip other applicants by mugging up the concepts blindfolded. It’s better to have something extra to impress the recruiters and bag any Informatica job in the blink of an eye. What can give you such a competitive advantage? Yes, you’ve guessed it correctly!

A comprehensive Informatica interview questions can help you prepare well and get any job quickly. If you have enrolled in a Simplilearn online course, revising the entire curriculum the night before an Informatica interview will be hectic. However, brushing up on the concepts through real-life interview questions is the best deal. Also, you can appear more prepared in an interview if you already know what your interviewers will likely ask. 

It is your ultimate location if you are looking for the most frequently-asked Informatica interview questions. Let’s dive into the article and review the best Informatica interview questions!

  1. What do you mean by Informatica? Why do we use it?

Informatica is a software development firm that provides ETL, data virtualization, master data management, data quality, data replica, ultra messaging, and other data integration solutions.

The following are some of the most well-known Informatica products

  • Informatica PowerConnect
  • Informatica PowerCenter
  • Informatica Power Exchange
  • Informatica Power Mart
  • Informatica Power Quality
  • Informatica Power Analysis

When working with data systems that contain data, we need Informatica to conduct particular operations and follow a set of rules. It cleans and changes data from structured and unstructured data systems easier on the operations line.

  1. What do you mean by Informatica PowerCenter?

It’s an ETL/Data Integration tool for connecting and retrieving data from various sources and processing data. PowerCenter manages a large amount of data and facilitates data retrieval from ERP systems like SAP, PeopleSoft, and others.

To integrate data into a third system, you can link PowerCenter to database management systems like SQL and Oracle.

  1. In a repository, what is the format of Informatica objects? What databases can it connect to through Windows?

You can write Objects in Informatica in XML format.

The following is a list of databases with which it may communicate:

  • Oracle
  • SQL Server
  • MS Excel
  • MS Access
  • DB2
  • Teradata
  • Sybase
  1. What are the various components of PowerCenter?

Following are the seven essential components of PowerCenter:

  • PowerCenter Service
  • PowerCenter Clients
  • PowerCenter Repository
  • PowerCenter Domain
  • Repository Service
  • Integration Service
  • PowerCenter Administration Console
  • Web Service Hub
  1. What makes a repository server different from a powerhouse?

The repository server is in charge of the entire repository, including tables, charts, and numerous procedures. Its primary purpose is to ensure the integrity and consistency of the warehouse. The implementation of innumerable operations among the factors of the server’s database repository is governed by a powerhouse server.

  1. What is the advantage of segmenting a session?

Within a session, partitioning involves creating solo implementation sequences. Its primary goal is to improve the server’s performance and efficiency. Other transformations, such as extractions and different single partition outputs, are performed in parallel.

  1. What are the sessions?  How do batches combine executions?

A session is a teaching set that you can apply to transfer data from a source to a goal. You can use the session manager or the pmcmd command to manage the session. 

You can use batch execution to combine the execution of several sessions in a serial or parallel way. Different sessions can be carried on in batches parallely or serially.

  1. What is the difference between a mapping parameter and a mapping variable, and how do you explain it?

A mapping variable is a variable that changes values during the execution of a session. When the session is finished, the Informatica server saves the end value, which is then reused when the session is restarted. Furthermore, mapping parameters are values that do not change during the execution of the session. The mapping procedure describes how to use mapping parameters. Before the session begins, these parameters are given values.

  1. What are the benefits of using aggregator cache files?

During each run, aggregator transformations are handled in chunks of instructions. It keeps track of transitional values encountered in the local buffer memory. Aggregators provide additional cache files for storing transformation values if more memory is needed.

  1. Can you explain lookup transformation?

Lookup transformations access data sets stored in a relational database management system (RDBMS). The server speeds up access by looking up detailed table data or the database in lookup tables. Associating the lookup condition with all lookup ports given during transformations yields concluding data.

  1. What exactly is code page compatibility?

Data loss cannot occur when data is transferred from one code page to another if both pages have the same character set. The target page must comprise attributes of the source page. Furthermore, if all of the characters from the source page are not present on the target page, it is a subset, and data loss will almost certainly occur during transformation due to the incompatibility of the two code pages.

  1. Describe Expression transformation?

In this type of transformation, values can be calculated in a single row before writing to the target. You can use it to conduct calculations that aren’t aggregated. Compositional statements can be evaluated before sending the output results to the target tables.

  1. What exactly do you mean by “filter transformation”?

It’s a filtering method for rows in a mapping. Firstly, convert the data, and then the filter condition must be applied. The rows that fulfill the criterion can only travel via the filter transformation, containing all input/output ports.

  1. What do you mean by Joiner transformation?

A joiner transformation combines data from two affiliated heterogeneous sources located in various places, whereas a source qualifier transformation combines data from a single source.

Conclusion

During the screening assessments, these Informatica interview questions will give you an upper leg. You can ensure better exam performance if you have prepared this questionnaire right before appearing for the interview.