Data warehousing testing interview questions

  • How do you test data in a data warehouse?

    Data Warehouse Testing tools (DWH testing tools) are specialized for data-centric systems, aiming to automate testing and certification processes in data warehousing.
    These tools play a crucial role during the development phase of the data warehouse..

  • What are the interview questions for ETL testing?

    In system testing, the whole data warehouse application is tested together.
    The purpose of system testing is to check whether the entire system works correctly together or not.
    System testing is performed by the testing team..

  • What are the main steps in the data warehouse testing process?

    Let's dive in

    Step 1: gather and analyze requirements.Step 2: define the testing scope.
    Extraction.
    Transformation.
    Loading.Step 3: design test cases.Step 4: set up the testing environment.Step 5: execute test cases.Step 6: verify test results.Step 7: report and document findings.The limits of data warehouse testing..

  • What is data warehouse testing tool?

    1.
    Explain partitioning in ETL and write its type. 2.
    Write different ways of updating a table when SSIS (SQL Server Integration Services) is being used.6 days ago.

  • What is system testing in data warehouse?

    1.
    Explain partitioning in ETL and write its type. 2.
    Write different ways of updating a table when SSIS (SQL Server Integration Services) is being used.6 days ago.

  • Data integrity can be compromised when data is created, integrated, moved, or transformed.
    BI/data warehouse testing is designed to prevent data integrity issues by exposing the problem early and automatically.
ETL Testing Interview Questions for Freshers
  • 1) What is ETL?
  • 2) Explain what are the ETL testing operations includes?
  • 3) Mention what are the types of data warehouse applications and what is the difference between data mining and data warehousing?
  • 4) What are the various tools used in ETL?
  • 5) What is fact?

What are the benefits of data warehousing?

Example: "A few benefits of data warehousing include increased efficiency, lower operational costs and improved decision-making

If a data warehouse has clear and consistent labeling procedures for its dimensions, you can easily find and analyze data

What is the difference between data warehousing and business intelligence?

Businesses rely on data to provide insights on what they can do next and how long it would take to reach those desired outcomes

Both data warehousing and business intelligence allow for the accurate storage and organization of data

Data warehousing is the fundamental area that facilitates business intelligence processes

Here are 10 data warehouse interview questions and example answers for you to study:

  • 1. What's the purpose of a data warehouse? ...
  • 2. What's the difference between agglomerative clustering and divisive hierarchical clustering? ...
  • 3. Explain dimensional modeling. ...
  • 4. What does data warehousing involve, and what are its benefits? ...
  • 5. Tell me what skills an IT professional needs when working in a data warehouse. ...
  • 6. How does data warehousing relate to business intelligence? ...
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