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Data Warehouse Interview Questions
Questions Answers Views Company eMail

1. How many People are part of your Team? 2. Explain how you create jobs or flow of project? 3. Join Stage vs Lookup vs Merge Stage 4. Summation scenario based question - How you find sum of salary for a specific employee (Explain stages and flow of job)? 5. Explain Remove duplicates stage ? Can you do sort in this stage? 6. SQL Questions - Joins - Types, Difference between Join and Union 7. Unix Questions - How you run the Job, How you list all jobs in project 8. Explain Environmental Variables? 9. SQL Scenario - If you have 3 Identical record in a Table, Ex: 1, Ram, Xyz; 1, Ram, Xyz; 1, Ram, Xyz; Delete only 2 of the records and keep only 1 using the Delete query. How you will you do this?

1 1427

What is Local Cache and how does it help in performance tuning

1 1422

How do you improve the performance of the Cognos Analytics report

972

What will be the output of using partition by Round-Robin after the partiton by key in ab initio?

1 2060

What will be the skew for, input file->partition by key-> partition by round robin->output file

904

file having these input and we have to get 3 output using same job Input 1 1 1 2 3 4 4 4 o/p1 o/p2 o/p3 1 1 2 2 1 3 3 1 4 4 4

887

how to achieve this output ? Two Input columns(ID & Name) - ID | Name 1 | Jack 1 | Kara In output there should be only 1 column which will be populated as - 1,Jack 1,Kara

752

what is the output when -1 is put in select_expr of FBE?

1369

How to replace last 4 digits of an input column with XXXX given input column has 12 digits?

1024

Code check-in and check-out commands in AbInitio

4244

Given input file with single column having 1 2 2 4 3 .. Required output 1 2 2 4 4 4 4 3 3 3.. How?

934

How to process records in batches like 1-20 records in first execution and 21-40 records in second run.. so on

905

How to convert a single column values 1 2 3 4 to single row of 4 columns ? And vice-versa

1024

Runtime behavior of Normalize and Reformat

2625

What will be the output when a file with 0 records is connected as input to a reformat and an output file? Note that in reformat we have assigned hardcoded values to output columns.

943


Un-Answered Questions { Data Warehouse }

What are session timeout and application timeout? Where we have to do this process?

974


What is is the guidelines to build universe with better performance? R performance tuning issues of universes?

846


Explain the key challenges that you face while performing etl testing.

945


How many clustered indexes can you create for a table in dwh? In case of truncate and delete command what happens to table, which has unique id.

977


How do users receive only information that they want?

921


What do you understand by the term ‘frame manager' in cognos and write all the layers of the framework manager model?

1110


Backup Script was blocked you are unable to archive the data now. how do you analyze it and where do you identify ?

1997


In proc transpose and data step with arrays which one you pick?

3040


How to open a universe with out using the Designer ??

7450


What is intricate mapping?

1091


Explain security role?

873


Is it possible to implement parallelism in Mainframe Jobs ? If Yes how ? If no why ?

2176


In source system we have os - windows BO - 5.1.5. with webi 2.7.1 Repository database - oracle Reports database - Oracle and DB2 Nearly we have 1200 reports in present system , i want to move as it is to new hardware os- windows bo- 5.1.5 with webi2.7.1 repository - oracle reports - oracle and db2 let me know is there any migration techniques in same version. thanks in advance Usha

2215


Mention some file extensions which are used in abinitio?

1065


hi, this is harish. i had finsihed cognos course recently.can some one help in the area of project explination, interview questions,real time scenarious....this is my maild id nanagupta907@gmail.com

1887