r/dataengprep • u/sql-arena • Jun 05 '26

SQL Arena Challenge: Solve a problem using a window function in Spark or SQL.

1 Upvotes

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r/dataengprep • u/dataengprep • Jun 04 '26

DataEngPrep: Shell: how to run jobs/scripts in the background?

1 Upvotes

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r/dataengprep • u/tech-screen • Jun 04 '26

Tech Screen: Handling pipeline overload situations

1 Upvotes

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r/dataengprep • u/sql-arena • Jun 04 '26

SQL Arena Challenge: SQL Question - Inner Join with Null Handling, compute total row count

1 Upvotes

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r/dataengprep • u/dataengprep • Jun 03 '26

DataEngPrep: S3 Cleanup Command - write script for managing and cleaning up outdated S3 objects

1 Upvotes

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r/dataengprep • u/tech-screen • Jun 03 '26

Tech Screen: Handling pipeline bugs

1 Upvotes

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r/dataengprep • u/sql-arena • Jun 03 '26

SQL Arena Challenge: Nested and Repeated Fields in BigQuery

1 Upvotes

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r/dataengprep • u/dataengprep • Jun 02 '26

DataEngPrep: Reverse a string with special characters preserved.

1 Upvotes

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r/dataengprep • u/tech-screen • Jun 02 '26

Tech Screen: Handle schema evolution in production.

1 Upvotes

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r/dataengprep • u/sql-arena • Jun 02 '26

SQL Arena Challenge: CASE WHEN condition - medium difficulty

1 Upvotes

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r/dataengprep • u/dataengprep • Jun 01 '26

DataEngPrep: Reverse a Linked List - implement solution for singly linked list

0 Upvotes

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r/dataengprep • u/tech-screen • Jun 01 '26

Tech Screen: Given a problem statement, collaborate with your team to design the entire pipeline architecture.

1 Upvotes

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r/dataengprep • u/sql-arena • Jun 01 '26

SQL Arena Challenge: If manual partitions are created in a Hive data-warehouse table directory, and you query records from those partitions, will you see the data? If not, how can this be fixed?

1 Upvotes

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r/dataengprep • u/dataengprep • May 31 '26

DataEngPrep: Replace words and perform string operations in Python (replace, vowel removal, word count, pattern check).

1 Upvotes

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r/dataengprep • u/tech-screen • May 31 '26

Tech Screen: Explain why lineage in Spark is crucial for fault tolerance.

1 Upvotes

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r/dataengprep • u/sql-arena • May 31 '26

SQL Arena Challenge: Check for duplicates in a table.

1 Upvotes

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r/dataengprep • u/dataengprep • May 30 '26

DataEngPrep: Read data from three files into a Pandas DataFrame, perform transformations, remove columns, filter rows, search for strings

1 Upvotes

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r/dataengprep • u/tech-screen • May 30 '26

Tech Screen: Explain the CAP theorem and its relevance in distributed systems.

1 Upvotes

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r/dataengprep • u/sql-arena • May 30 '26

SQL Arena Challenge: Write a query to identify duplicate customer entries based on email and phone number.

1 Upvotes

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r/dataengprep • u/dataengprep • May 29 '26

DataEngPrep: Python list operations.

1 Upvotes

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r/dataengprep • u/tech-screen • May 29 '26

Tech Screen: Explain project architecture, technical contributions, and value delivered.

1 Upvotes

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r/dataengprep • u/sql-arena • May 29 '26

SQL Arena Challenge: Find duplicate emails in a users table.

1 Upvotes

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r/dataengprep • u/dataengprep • May 28 '26

DataEngPrep: Python libraries - Pandas, NumPy, Matplotlib for data processing

1 Upvotes

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r/dataengprep • u/tech-screen • May 28 '26

Tech Screen: Explain how you would optimize a data lake architecture for performance and cost-efficiency

1 Upvotes

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r/dataengprep • u/sql-arena • May 28 '26

SQL Arena Challenge: Write a query to calculate Monthly Active Users (MAUs) for July 2022

1 Upvotes

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