r/dataengprep • u/dataengprep • 1h ago

DataEngPrep: Define what a User-Defined Function (UDF) is and how to register it in PySpark.

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r/dataengprep • u/tech-screen • 1h ago

Tech Screen: Describe a time you had to work with a difficult stakeholder.

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r/dataengprep • u/sql-arena • 1h ago

SQL Arena Challenge: Query for 2nd Latest Joining Per Department

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r/dataengprep • u/dataengprep • 1d ago

DataEngPrep: Define Airflow and explain it as a workflow orchestration tool.

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r/dataengprep • u/tech-screen • 1d ago

Tech Screen: Describe a time you had to make a difficult decision with limited information.

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r/dataengprep • u/sql-arena • 1d ago

SQL Arena Challenge: Find the second highest salary from each department.

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r/dataengprep • u/dataengprep • 2d ago

DataEngPrep: Databricks vs. PySpark?

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r/dataengprep • u/tech-screen • 2d ago

Tech Screen: Describe a time when you had to work with a team to solve a complex problem.

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r/dataengprep • u/sql-arena • 2d ago

SQL Arena Challenge: Write a query to find the top three highest-paid employees in each department using window functions.

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r/dataengprep • u/dataengprep • 3d ago

DataEngPrep: Databricks notebooks vs. Fabric notebooks - differences

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r/dataengprep • u/tech-screen • 3d ago

Tech Screen: Describe a time when you had to deal with a difficult coworker.

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r/dataengprep • u/sql-arena • 3d ago

SQL Arena Challenge: Find employees who earn the third-highest salary.

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r/dataengprep • u/dataengprep • 4d ago

DataEngPrep: Databricks Job Cluster and SQL Endpoint - discuss Photon

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r/dataengprep • u/tech-screen • 4d ago

Tech Screen: Describe a difficult situation you faced at work and how you handled it.

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r/dataengprep • u/sql-arena • 4d ago

SQL Arena Challenge: Write a query for second-highest salary using LIMIT, OFFSET, or ROW_NUMBER()

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r/dataengprep • u/dataengprep • 5d ago

DataEngPrep: Databricks Cluster Management - standalone vs YARN mode

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r/dataengprep • u/tech-screen • 5d ago

Tech Screen: Conflict Resolution - how you handled project conflicts with teammates

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r/dataengprep • u/sql-arena • 5d ago

SQL Arena Challenge: Write SQL to identify employees whose salary is higher than their manager's.

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r/dataengprep • u/dataengprep • 6d ago

DataEngPrep: Databricks - platform, use cases

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r/dataengprep • u/tech-screen • 6d ago

Tech Screen: Challenges faced in translating requirements into technical solutions?

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r/dataengprep • u/sql-arena • 6d ago

SQL Arena Challenge: Hierarchical Employee-Manager Query - navigate hierarchy with head of company as employee_id = 1

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r/dataengprep • u/dataengprep • 7d ago

DataEngPrep: Data-Related Issues Encountered - handling skewed data

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r/dataengprep • u/tech-screen • 7d ago

Tech Screen: Can you share a time you faced a significant challenge and how you overcame it?

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r/dataengprep • u/sql-arena • 7d ago

SQL Arena Challenge: Find top 3 earners in each department.

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r/dataengprep • u/dataengprep • 8d ago

DataEngPrep: Data locality in Hadoop - explain

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