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Informatica interview question answers collection

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  • 1. Informatica Interview Question Answers Collection  Informatica FAQS Technical Interview Questions  Informatica Job Interview Questions Answers  Informatica ETL Interview Questions  Informatica Interview FAQs And Answers  Informatica Interview Questions Collection Can you copy the session to a different folder or repository? Yes. By using copy session wizard, you can copy a session in a different folder or repository. What is a command that used to run a batch? pmcmd is used to start a batch. What are the types of mapping in Getting Started Wizard? Simple Pass through mapping Slowly growing target mapping What are the different types of Type2 slowly changing dimensions? There are three types of slowly changing dimensions SCD with versioning SCD with flags SCD with Date What are the different threads in DTM process? Master thread Mapping thread Reader thread Writer thread
  • 2. Pre and post session threads What are the active and passive transformations? An active transformation can change the number of rows that pass through it. A passive transformation does not change the number of rows that pass through it. What are the scheduling options to run a session? Different options of scheduling are Run only on demand: Informatica server runs the session only when user starts session explicitly Run once: Informatica server runs the session only once at a specified date and time. Run every: Informatica server runs the session at regular intervals as you configured. Customized repeat: Informatica server runs the session at the date and time specified in the repeat dialog box. How can we store previous session logs? Just run the session in time stamp mode then automatically session log will not overwrite current session log. What is the difference between Mapping and Mapplet? Mapping is the collection of Source Definition, Target Definition, Transformation(s) and/or Mapplet. Mapplet is a set of reusable transformations for applying same business logic. What is the use of Repository Manager? Repository Manager is used to manage folders, view Source/Target dependencies, Mapping Dependencies, adding and removing repositories, Versioning etc. What are the various Tasks in Informatica Workflow Manager? The various Tasks in Informatica are Assignment Task Command Task
  • 3. Control Task Decision Task E-mail Task Event Raise Task Event Wait Task Session Task Timer Task Link Task What is the use of Source Analyzer? Source Analyzer is used to create source definition. What is the use of Target Designer? Target Designer is used to create Target Definition. What is Target Designer called prior to Informatica 8.6? Warehouse Designer Can we use Reusable Sequence Generator transformation in Mapplet? No Why Cache? Explain with an example? If there are x lot number of records with y number of columns from source data and we need to extract z number of columns only (very less) then the cache stores those columns for respective records in the $PMCACHEDIR of Informatica Server so that we don’t need to extract each record from database and load into Informatica. Doing this increases the performance of the system. What is the use of Shared Object? It is easier to explain this using an example.
  • 4. Suppose there is an object which is used by many users in the company. If the object undergoes a change, this change has to be updated to each and every user. Instead, if the object is made as shared, then the update has to be done to the object and all other users get the update. What is Dual table? Dual table is a table that is created by oracle along with data dictionary. It gives output of exactly one column name dummy and one record ‘x’. Select * from Dual; ----------- DUMMY X Can we install Power Center Informatica 8.X version on Windows 7? No we can’t install Informatica on Power Center. We can Install Informatica 9.x on Windows 7. What are the types of variables in Informatica? There are three types of variables in Informatica Predefined variable represented by $ User defined variable represented with $$ System variable denoted by $$$  Informatica Interview Questions Collection 2  Informatica Interview Questions Collection 1  Informatica ETL Interview Questions  IBM Informatica Technical Questions  Informatica Interview Questions Collection  Informatica Technical Questions Collection