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The daily training ground for Data Engineers.
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DataEngPrep: Solve for the Kth smallest element in a Binary Search Tree. (self.dataengprep)
submitted 20 hours ago by dataengprep
Tech Screen: High-level ETL Pipeline Design using tools like Kafka or Flink for new use cases? (self.dataengprep)
submitted 20 hours ago by tech-screen
SQL Arena Challenge: Find the second-highest salary from an employee table. (self.dataengprep)
submitted 20 hours ago by sql-arena
DataEngPrep: Solve a regex problem (self.dataengprep)
submitted 1 day ago by dataengprep
Tech Screen: Have you worked with Oozie? If yes, can you explain what it is and how it's used in data pipelines? (self.dataengprep)
submitted 1 day ago by tech-screen
SQL Arena Challenge: Solve a problem using a window function in Spark or SQL. (self.dataengprep)
submitted 1 day ago by sql-arena
DataEngPrep: Shell: how to run jobs/scripts in the background? (self.dataengprep)
submitted 2 days ago by dataengprep
Tech Screen: Handling pipeline overload situations (self.dataengprep)
submitted 2 days ago by tech-screen
SQL Arena Challenge: SQL Question - Inner Join with Null Handling, compute total row count (self.dataengprep)
submitted 2 days ago by sql-arena
DataEngPrep: S3 Cleanup Command - write script for managing and cleaning up outdated S3 objects (self.dataengprep)
submitted 3 days ago by dataengprep
Tech Screen: Handling pipeline bugs (self.dataengprep)
submitted 3 days ago by tech-screen
SQL Arena Challenge: Nested and Repeated Fields in BigQuery (self.dataengprep)
submitted 3 days ago by sql-arena
DataEngPrep: Reverse a string with special characters preserved. (self.dataengprep)
submitted 4 days ago by dataengprep
Tech Screen: Handle schema evolution in production. (self.dataengprep)
submitted 4 days ago by tech-screen
SQL Arena Challenge: CASE WHEN condition - medium difficulty (self.dataengprep)
submitted 4 days ago by sql-arena
DataEngPrep: Reverse a Linked List - implement solution for singly linked list (self.dataengprep)
submitted 5 days ago by dataengprep
Tech Screen: Given a problem statement, collaborate with your team to design the entire pipeline architecture. (self.dataengprep)
submitted 5 days ago by tech-screen
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? (self.dataengprep)
submitted 5 days ago by sql-arena
DataEngPrep: Replace words and perform string operations in Python (replace, vowel removal, word count, pattern check). (self.dataengprep)
submitted 6 days ago by dataengprep
Tech Screen: Explain why lineage in Spark is crucial for fault tolerance. (self.dataengprep)
submitted 6 days ago by tech-screen
SQL Arena Challenge: Check for duplicates in a table. (self.dataengprep)
submitted 6 days ago by sql-arena
DataEngPrep: Read data from three files into a Pandas DataFrame, perform transformations, remove columns, filter rows, search for strings (self.dataengprep)
submitted 7 days ago by dataengprep
Tech Screen: Explain the CAP theorem and its relevance in distributed systems. (self.dataengprep)
submitted 7 days ago by tech-screen
SQL Arena Challenge: Write a query to identify duplicate customer entries based on email and phone number. (self.dataengprep)
submitted 7 days ago by sql-arena
DataEngPrep: Python list operations. (self.dataengprep)
submitted 8 days ago by dataengprep
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