EPAM Systems ETL Tester Interview Questions, Process, and Tips

Q1. What is ETl testing
Ans. 
ETL testing is the process of validating and verifying data extraction, transformation, and loading in a data warehouse or data mart.
• ETL testing involves ensuring data is extracted correctly from the source systems

• It also involves verifying that data is transformed accurately according to business rules

• Lastly, ETL testing checks that the loaded data is accurate and complete in the target database

• Examples include valida...read more
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Q2. What is the data warehouse
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A data warehouse is a centralized repository that stores structured and unstructured data from multiple sources for analysis and reporting.
• Data warehouses are designed for querying and analysis rather than transaction processing.

• They often contain historical data that is used for creating reports and data analysis.

• Data warehouses typically use ETL processes to extract, transform, and load data from various sources.

• Exam...read more
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Need to solve the use case and prepare code

Q1. Relevant questions on real time scenarios
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Q1. Many questions they asked
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Q1. What is the difference between Test Plan and Test strategy
Ans. 
Test plan is a detailed document that outlines the testing approach and activities. Test strategy is a high-level document that outlines the testing objectives and methods.
• Test plan is more detailed than test strategy

• Test plan includes specific test cases and test scenarios

• Test strategy outlines the overall testing approach and objectives

• Test strategy is created before the test plan

• Test strategy is reviewed and updated
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Q2. What is requirement traceability matrix.. compatibility Testing
Ans. 
Requirement Traceability Matrix is a document that links requirements to test cases. Compatibility testing checks if software works on different platforms.
• Requirement Traceability Matrix (RTM) is used to ensure that all requirements are tested and covered in test cases.

• RTM helps in tracking the progress of testing and ensures that all requirements are met.

• Compatibility testing is done to ensure that software works on d...read more
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Q3. Explain STLC .. difference between water fall and Agile methodologies
Ans. 
STLC is Software Testing Life Cycle which includes planning, designing, executing and reporting. Waterfall is a linear approach while Agile is iterative.
• STLC is a process of testing software from planning to reporting

• Waterfall is a linear approach where each phase is completed before moving to the next

• Agile is an iterative approach where testing is done in short cycles called sprints

• In Waterfall, testing is done at the...read more
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Q4. Where do you mantain entry and exit criteria
Ans. 
Entry and exit criteria are maintained in the test plan document.
• Entry criteria specify the conditions that must be met before testing can begin.

• Exit criteria specify the conditions that must be met before testing can be considered complete.

• These criteria are typically documented in the test plan document.

• Examples of entry criteria include having the necessary test data and test environment set up.

• Examples of exit crit...read more
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Q5. There are some sql queries questions
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Q6. What is a iterative model
Ans. 
Iterative model is a software development model where the development process is divided into smaller iterations.
• Iterative model involves repeating the development process in small cycles.

• Each cycle involves planning, designing, building, testing and evaluating the software.

• Feedback from each cycle is used to improve the software in the next cycle.

• Iterative model is useful when requirements are not clear or keep changi...read more
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Q7. Why do you want job change
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Q8. Questions on sql joins
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Q9. Questions on HP ALM Test management tool
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Q10. Explain Defects life cycle
Ans. 
Defects life cycle is a process that describes the stages of a defect from discovery to resolution.
• Defect is identified and reported

• Defect is assigned to a developer

• Developer fixes the defect

• Defect is retested by the tester

• If the defect is still present, it is reopened

• If the defect is fixed, it is closed
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Q11. How do you map requirement to test cases
Ans. 
Requirements are mapped to test cases by analyzing the requirements and creating test cases that cover all the aspects of the requirement.
• Analyze the requirement document thoroughly

• Identify the key functionalities and features

• Create test cases that cover all the aspects of the requirement

• Ensure that the test cases are traceable to the requirement

• Review and validate the test cases with stakeholders
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Q12. How do you compare files in Unix
Ans. 
Files can be compared in Unix using the diff command.
• Use the 'diff' command followed by the two file names to compare them.

• The output will show the differences between the two files.

• Use the '-y' option to display the differences side by side.

• Use the '-q' option to only show if the files are different or not.

• Use the '-r' option to compare files in directories recursively.
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Q13. Agile methodologie , questions on scrum master
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Q14. What are the components of test cases
Ans. 
Components of test cases include test case ID, test case description, test steps, expected results, actual results, and status.
• Test case ID: unique identifier for the test case

• Test case description: brief description of the test case

• Test steps: detailed steps to execute the test case

• Expected results: expected outcome of the test case

• Actual results: actual outcome of the test case

• Status: pass/fail status of the test cas
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Q15. What risks do you see in Test completion
Ans. 
Incomplete testing can lead to undetected defects and potential risks in production.
• Undetected defects can cause system failures and downtime.

• Incomplete testing can lead to security vulnerabilities.

• Lack of testing can result in poor user experience and customer dissatisfaction.

• Incomplete testing can lead to increased maintenance costs and longer development cycles.
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Q16. Tell us about your current project . Roles and responsibilities
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Q17. What documents will you produce durimg and sfter testing phase
Ans. 
I will produce test plan, test cases, test scripts, defect reports, and test summary report.
• Test plan outlining the testing approach and scope

• Test cases with steps, expected results, and actual results

• Test scripts for automation

• Defect reports with steps to reproduce and severity

• Test summary report with overall results and recommendations
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Q1. Waiting for the round 2
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