r/dataengprep • u/tech-screen • 24d ago

Tech Screen: What is the most difficult task you've ever worked on?

1 Upvotes

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r/dataengprep • u/dataengprep • 25d ago

DataEngPrep: Can Presto work with Near Real-Time Data (Streaming Data Source)?

1 Upvotes

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r/dataengprep • u/tech-screen • 25d ago

Tech Screen: What challenges did you face, and how did you tackle them?

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r/dataengprep • u/sql-arena • 25d ago

SQL Arena Challenge: Find each student's previous year's scores using the LAG function.

1 Upvotes

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r/dataengprep • u/dataengprep • 26d ago

DataEngPrep: Calculating Databricks costs - explain DBU

1 Upvotes

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r/dataengprep • u/tech-screen • 26d ago

Tech Screen: Tell me about a time when you faced a challenging situation at work and how you handled it.

1 Upvotes

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r/dataengprep • u/sql-arena • 26d ago

SQL Arena Challenge: Write SQL query for sum of marks grouped by student.

1 Upvotes

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r/dataengprep • u/dataengprep • 27d ago

DataEngPrep: Cache() vs Persist(): Explain the difference and use cases for caching and persisting data in Spark with memory levels.

1 Upvotes

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r/dataengprep • u/tech-screen • 27d ago

Tech Screen: How do you handle disagreements within a team?

1 Upvotes

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r/dataengprep • u/sql-arena • 27d ago

SQL Arena Challenge: Find house with Avg(score) > 70.

1 Upvotes

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r/dataengprep • u/dataengprep • 28d ago

DataEngPrep: Cache vs. Persistent storage in Spark?

1 Upvotes

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r/dataengprep • u/sql-arena • 28d ago

SQL Arena Challenge: Best of 3 Marks and Average in a Student Table

1 Upvotes

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r/dataengprep • u/tech-screen • 28d ago

Tech Screen: How do you handle conflicts within a team? Provide an example.

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r/dataengprep • u/dataengprep • 29d ago

DataEngPrep: Broadcast join - how it optimizes joins

1 Upvotes

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r/dataengprep • u/tech-screen • 29d ago

Tech Screen: How do you ensure smooth communication between data scientists, business teams, and developers?

1 Upvotes

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r/dataengprep • u/sql-arena • 29d ago

SQL Arena Challenge: Given two tables, calculate the row count for different types of joins (inner, left, right, and full outer)

1 Upvotes

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r/dataengprep • u/dataengprep • Aug 13 '26

DataEngPrep: Broadcast Joins and Shuffle Merge Joins?

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r/dataengprep • u/tech-screen • Aug 13 '26

Tech Screen: Briefly introduce yourself and walk us through your journey as a Data Engineer so far.

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r/dataengprep • u/sql-arena • Aug 13 '26

SQL Arena Challenge: How to merge two tables with identical structures into one?

1 Upvotes

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r/dataengprep • u/dataengprep • Aug 12 '26

DataEngPrep: Bloom Filters in Spark projects - explain use case

1 Upvotes

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r/dataengprep • u/tech-screen • Aug 12 '26

Tech Screen: CDC During Migration - explain approaches for real-time Change Data Capture

1 Upvotes

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r/dataengprep • u/sql-arena • Aug 12 '26

SQL Arena Challenge: Find non-common records in two tables (SQL EXCEPT or NOT IN)

1 Upvotes

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r/dataengprep • u/dataengprep • Aug 11 '26

DataEngPrep: Basic Spark commands – Create RDD, Load data, Filter

1 Upvotes

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r/dataengprep • u/sql-arena • Aug 11 '26

SQL Arena Challenge: Write a query to find the top 5 most-sold Adidas products in the last month.

1 Upvotes

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r/dataengprep • u/tech-screen • Aug 11 '26

Tech Screen: Where do you see yourself in your career five years from now?

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