ETL Developer

ETL Developer Interview Questions and Answers for Freshers

Updated 11 Jan 2025
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Q1. Are you ok if we give you testing project

Ans.

Yes, I am open to taking on a testing project as part of my role as an ETL Developer.

  • I have experience with testing tools and methodologies in my previous roles.

  • I understand the importance of testing in ensuring data accuracy and quality.

  • Taking on a testing project will help me improve my skills and knowledge in ETL development.

Q2. Use error handling method with Stored Procedure

Ans.

Use TRY...CATCH block in SQL to handle errors in Stored Procedures

  • Enclose the code inside a TRY block

  • Use a CATCH block to handle any errors that occur

  • Use RAISEERROR or THROW statement to raise custom error messages

  • Use @@ERROR or @@ROWCOUNT to check for errors or affected rows

Q3. Which version of talend you are using

Ans.

I am using Talend version 7.3.1 for ETL development.

  • I am currently using Talend version 7.3.1 for ETL development.

  • The specific version of Talend being used is 7.3.1.

  • Talend 7.3.1 offers various features and improvements for ETL processes.

Q4. Stored Procedure to get user input

Ans.

Use a stored procedure to prompt user for input in ETL process.

  • Create a stored procedure with parameters to accept user input.

  • Use the parameters in the stored procedure to filter or manipulate data.

  • Prompt the user for input values when calling the stored procedure.

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Q5. Performance tuning of ssis packages

Ans.

Performance tuning of SSIS packages involves optimizing data flow, memory usage, and parallelism.

  • Optimize data flow by using efficient data sources and destinations

  • Minimize memory usage by using appropriate buffer sizes and reducing unnecessary data transformations

  • Increase parallelism by using multiple threads and optimizing task execution order

  • Use performance monitoring tools like SSIS logging and performance counters to identify bottlenecks

  • Consider using advanced techniques...read more

Q6. Explain SSIS and ite use cases

Ans.

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 extract data from a CRM system, transform it into a standardi...read more

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