Top Informatica Interview Questions :: ALLInterview.com http://www.allinterview.com Top Informatica Interview Questions en-us Explain about HLD and LLD ? http://www.allinterview.com/showanswers/58137.html HLD refers High Level Design and LLD refers Low Level Design Means HLD contains overview of the design and LLD contains detailed design. What is Performance tuning in Informatica? http://www.allinterview.com/showanswers/15949.html The goal of performance tuning is optimize session performance so sessions run during the available load window for the Informatica Server. Increase the session performance by following. The performance of the Informatica Server is related what are the difference between Informatica 7.1 and 8.1? http://www.allinterview.com/showanswers/60122.html DIFFERENCE BETWEEN INFORMATICA 7.1 AND 8.1 =========================================== Object Permissions* Effective in version 8.1.1, you can assign object permissions to users when you add a user account, set user permissions, or edit a Whatis the difference between View and Materialized View ? http://www.allinterview.com/showanswers/37203.html In view we cannot do DML commands where as it is possible in Materialized view. WHAT IS UPDATE OVERRIDE . DIFFERENCE BETWEEN SQL OVERRIDE AND UPDATE http://www.allinterview.com/showanswers/32091.html hai i guess this question comes under scd's itseems, becoz in scd type1 we will overwrite the oldvalue with new value.here we dont have any history What is a diff between joiner and lookup transformation http://www.allinterview.com/showanswers/56275.html Joiner will join the two different data sources based on a join condition ,and pass only the rows which satisfy that condition.discards the remaining rows. Joiner transformation supports 4 types of joins at Informatica level Normal Master What are the types of lookup caches? http://www.allinterview.com/showanswers/15891.html Persistent cache: yoU can save the lookup cache files and reuse them the next time the informatica server processes a lookup transformation configured to use the cache. Recache from database: If the persistent cache is not synchronized with he Generally how many Fact Tables and Dimensions Table you have used in http://www.allinterview.com/showanswers/29468.html it depends upon the requirement of the client . dimension table is loaded first , using the primary keys of the dimension table , fact tables are loaded .size of the fact and dimension table also depends upon the requirement . size of the table a what is a junk dimension ? http://www.allinterview.com/showanswers/11631.html A junk dimension is a convenient grouping of flags and indicators. It's helpful, but not absolutely required, if there's a positive correlation among the values. The benefits of a junk dimension include: ? Provide a recognizable, user What are mapping parametres and variables in informatica? http://www.allinterview.com/showanswers/13674.html mapping parametres is constant value it should defines in separately using mapping parametres create function provided informatica server, it use to create name,type,datatype,precision,scale. mapping variable should varied when the each tome What is operational data source (ODS)? http://www.allinterview.com/showanswers/15965.html thsi is the data base used to captur daily business activites and this is normalized databse. In real time scenario where can we use mapping parameters and variabl http://www.allinterview.com/showanswers/35417.html Mapping & Mapplet, v can use the mapping parameter & variable. V can also create the parameter & variable in the sesssion level. What is incremental aggregation and how it is done? http://www.allinterview.com/showanswers/36877.html Gradually to synchronize the target data with source data, there are further 2 techniques:- Refresh load - Where the existing data is truncated and reloaded completely. Incremental - Where delta or difference between target and source data 1)can anyone explain how to use Normalizer transformation for the fo http://www.allinterview.com/showanswers/33105.html Hi, actually normalizer tr act as a datapivoting. datapivoting sense to generate the multiple records from a single record. What is Factless fact table ??? http://www.allinterview.com/showanswers/36017.html A Fact table without measures(numeric data) for a column is called Factless Fact table. eg: Promotion Fact(only key value available in FT)