Innova Solutions ETL Developer Interview Questions and Answers

Q1. Informtica with date functions
Ans. 
Informatica is a popular ETL tool used for data integration and transformation. It has built-in functions to handle date operations.
• Informatica is a powerful ETL tool used for extracting, transforming, and loading data.

• It provides a variety of built-in functions for handling date operations such as date calculations, formatting, and conversions.

• Examples of date functions in Informatica include TO_DATE, TO_CHAR, ADD_TO_
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Q1. Rank and dense rank
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Q2. Scenario based etl question
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Q1. Explain SSIS and ite use cases
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SSIS is a Microsoft tool used for ETL processes in data integration and data warehousing.
• SSIS stands for SQL Server Integration Services

• It is used for extracting, transforming, and loading data from various sources to destinations

• SSIS can be used for automating workflows, data cleansing, and data migration tasks

• It provides a visual interface for designing data flow tasks and control flow tasks

• Example: Using SSIS to ext...read more
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Q1. Informatica powercenter architecture, scd1, scd2 etc
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Q2. Lookups and where to use them
Ans. 
Lookups are used to retrieve related data from another table based on a common key.
• Lookups are used in ETL processes to enrich data by adding additional information from a reference table.

• They are commonly used to replace codes with corresponding descriptions, such as replacing product IDs with product names.

• Lookups can be performed using SQL joins or lookup transformations in ETL tools like Informatica or Talend.
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It's an assignment for apti, verbal

Q1. It's like an what are u mentioned in resume skills.
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Q1. Just like interaction with candidate like personal details.
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Q1. What is the uses of filter stage
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Filter stage is used in ETL processes to selectively pass or reject data based on specified criteria.
• Filter stage helps in removing unwanted data from the input dataset.

• It can be used to apply conditions like filtering out duplicate records, selecting specific columns, or excluding certain values.

• For example, a filter stage can be used to only pass records where the sales amount is greater than $1000.
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Q2. What is the uses of transfor stage
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Transform stage is used in ETL process to apply business rules, clean and enrich data before loading into target database.
• Transform stage is used to apply business rules to the data.

• It is used to clean and standardize data before loading into the target database.

• Transform stage can also be used to enrich data by combining multiple sources or adding calculated fields.

• Examples include converting data types, removing dupl
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Q3. What is the uses of sort stage
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Sort stage is used in ETL processes to sort data based on specified criteria before loading it into the target system.
• Sort stage helps in arranging data in a specific order for better analysis and reporting

• It can be used to remove duplicates from data before loading

• Sorting can be done based on multiple columns or expressions

• Example: Sorting customer data based on their purchase amount before loading into a data warehou
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Q4. How to create the prallel job
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To create a parallel job, use parallel processing techniques to divide tasks into smaller subtasks that can be executed simultaneously.
• Identify tasks that can be executed independently and in parallel

• Use parallel processing techniques such as multi-threading or distributed computing

• Implement parallel job using ETL tools like Informatica or Talend

• Monitor and optimize parallel job performance to ensure efficient executio
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Q5. Defenation of scd
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SCD stands for Slowly Changing Dimension, a technique used in data warehousing to track changes in dimension attributes over time.
• SCD is used to maintain historical data in a data warehouse

• There are different types of SCDs - Type 1, Type 2, and Type 3

• Type 1 SCD overwrites old data with new data

• Type 2 SCD creates a new record for each change and maintains history

• Type 3 SCD keeps a limited history by adding columns to tr
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Q1. Basic questions based on Informatica power center
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Q1. Scenario based questions on Informatica power center
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Q1. Basic salary and other discussion
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Q1. Question on logic SCD types
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Q2. Dynamic lookup along with lookup
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