Answer Posted / mahesh

Explain how you create jobs or flow of project?
Meta Data Import - Stages with Transformation logics - Load into Staging Tables

Join Stage vs Lookup vs Merge Stage
Differences
Mentioned about Input and Output, Reject Links
Mentioned about Volumes of Data etc.,

Summation scenario based question - How you find sum of salary for a specific employee (Explain stages and flow of job)?
Import Meta data - Database Connector - Filter Stage - Aggregator stage (Sum) - To list Result into a file Ex. Dataset

Explain Remove duplicates stage ? Can you do sort in this stage?
Removes the Duplicate values based on the First retained or second retain
Remove duplicates does have only internal sort, As a Recommendation It is better if we send Remove duplicate stage sorted data.

6. SQL Questions - Joins - Types, Difference between Join and Union
Join Types
Full Outer
Left Outer
Right Outer
Inner Join

Union vs Full outer: Union is similar to the Funnel stage in DS. Union need to be done on tables which has similar meta data where as Full outer need a matching Column between 2 or more tables

7. Unix Questions - How you run the Job, How you list all jobs in project
dsjob -run projectname jobname
dsjob -ljobs projectname

8. Explain Environmental Variables?
Can be created from DS Administrator, from User defined variables. Which can be used across all the projects in Datastage

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?
- I didn't answer this. Please let me know if you have any thoughts. Which will help for future interviews. Thanks

Difference between in process and inter process?

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if i have two tables table1 table2 1a 1a,b,c,d 1b 2a,b,c,d,e 1c 1d 2a 2b 2c 2d 2e how can i get data as same as in tables? how can i implement scd typ1 and type2 in both server and in parallel? field1 field2 field3 suresh , 10,324 , 355 , 1234 ram , 23,456 , 450 , 456 balu ,40,346,23 , 275, 5678 how to remove the duplicate rows,inthe fields?

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Name the third party tools that can be used in datastage?

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what is 'reconsideration error' and how can i respond to this error and how to debug this

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what are the errors,warnings in datastage

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Define Routines and their types?

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sed,awk,head

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What are routines in datastage? Enlist various types of routines.

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Explain Quality stage?

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What is the difference between an operational datastage and a data warehouse?

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On which interface you will be working as a developer?

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Can you explain players in datastage?

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What are stage variables and constants?

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create a job that splits the data in the Jobs.txt file into four output files. You will direct the data to the different output files using constraints. • Job name: JobLevels • Source file: Jobs.txt • Target file 1: LowLevelJobs.txt − min_lvl between 0 and 25 inclusive. − Same column types and headings as Jobs.txt. − Include column names in the first line of the output file. − Job description column should be preceded by the string “Job Title:” and embedded within square brackets. For example, if the job description is “Designer”, the derived value is: “Job Title: [Designer]”. • Target file 2: MidLevelJobs.txt − min_lvl between 26 and 100 inclusive. − Same format and derivations as Target file 1. • Target file 3: HighLevelJobs.txt − min_lvl between 101 and 500 inclusive. − Same format and derivations as Target file 1. • Rejects file: JobRejects.txt − min_lvl is out of range, i.e., below 0 or above 500. − This file has only two columns: job_id and reject_desc. − reject_desc is a variable-length text field, maximum length 100. It should contain a string of the form: “Level out of range: ”, where is the value in the min_lvl field. My Question is how do you write the stage variable for reject rows.

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tell me 5 situations when we r using oracle db stages like orecle connector, oracle enterprise

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