Top Data Warehouse Interview Questions :: ALLInterview.com http://www.allinterview.com Top Data Warehouse Interview Questions en-us 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 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. How to create a dynamic column name in Cognos? http://www.allinterview.com/showanswers/13065.html These are the steps - i. Create a calculated column which contains the information that the header is to contain, such as "Report for year 1999" (concatenated text and date to string sub string extraction). ii. Highlight the re 1)Difference between BO 5.1.2 and BO 6.5.1 and also BO XI (R2)?? 2)D http://www.allinterview.com/showanswers/36540.html 1) BO 5.1.2 had no Infoview. BO 6.5.1 included Infoview, but no Crystal Report, CMC not present, instead Supervisor(thick client) was used for giving Users rights. BO XI includes intgration with Crystal Reports, CMC (THin Client) for managi When should you use a STAR and when a SNOW-FLAKE schema? http://www.allinterview.com/showanswers/14115.html The snowflake and star schema are methods of storing data which are multidimensional in nature (i.e. which can be analysed by any or all of a number of independent factors) in a relational database. The snowflake schema (sometimes called snowf how can one connect two fact tables ? is it possible ? how? http://www.allinterview.com/showanswers/32226.html This confirm dimenstion methodology.If a dimension table is connected to more then one Fact table is called confirm dimension. what are the enhancements in cognos reportnet ? http://www.allinterview.com/showanswers/23293.html Enhancements in Cognos reportnet is Cognos 1.0,1.1,MR1.1,MR1.2 what is the difference between aggregate table and fact table ? how d http://www.allinterview.com/showanswers/32079.html fact table is one which contains all the facts (measures).aggregate table is one which is created after the cube is processed.this aggregate table contains human unreadable text. 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 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 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 prompt? Cascading prompt? Syntax http://www.allinterview.com/showanswers/23069.html To prompt the values and it is used on where condtion and filter row syntax @select(class\object )= @prompt ('message','type','{values1,values2...},class\object,mono\mu lti,free\constrained) 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. Hierarchy of DWH? http://www.allinterview.com/showanswers/8482.html Data modeling ETL process BI process what is the difference between compiler and interpreter? give any one http://www.allinterview.com/showanswers/57417.html A compiler compiles the source code in a form that can be used directly by the computer. At run time the code is to run the programme is already there. An interpreter reads each line of the source code and converts it to machine code on the