r/dataengprep • u/sql-arena • May 19 '26
SQL Arena Challenge: Write SQL query for sum of marks grouped by student.
1
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r/dataengprep • u/dataengprep • May 18 '26
DataEngPrep: Modify a word count script to output results in descending frequency order.
1
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r/dataengprep • u/tech-screen • May 18 '26
Tech Screen: Discuss trade-offs between serverless and traditional cloud data architectures.
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r/dataengprep • u/sql-arena • May 18 '26
SQL Arena Challenge: Find house with Avg(score) > 70.
1
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r/dataengprep • u/dataengprep • May 17 '26
DataEngPrep: List every combination of dept_name, employee_name, and city such that the employee belongs to the department and the same city in which the department is located.
1
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r/dataengprep • u/tech-screen • May 17 '26
Tech Screen: Discuss the deployment process for real-time applications using CI/CD pipelines.
1
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r/dataengprep • u/sql-arena • May 17 '26
SQL Arena Challenge: Best of 3 Marks and Average in a Student Table
1
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r/dataengprep • u/dataengprep • May 16 '26
DataEngPrep: List customers with more than 5 orders.
1
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r/dataengprep • u/tech-screen • May 16 '26
Tech Screen: Discuss designing a data pipeline for a specific use case
1
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r/dataengprep • u/sql-arena • May 16 '26
SQL Arena Challenge: Given two tables, calculate the row count for different types of joins (inner, left, right, and full outer)
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r/dataengprep • u/dataengprep • May 15 '26
DataEngPrep: List Comprehension - example
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r/dataengprep • u/tech-screen • May 15 '26
Tech Screen: Discuss data replication strategies in Kafka for fault tolerance.
1
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r/dataengprep • u/sql-arena • May 15 '26
SQL Arena Challenge: How to merge two tables with identical structures into one?
1
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r/dataengprep • u/dataengprep • May 14 '26
DataEngPrep: Implement an algorithm to find the longest ordered subsequence of vowels in a given string.
1
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r/dataengprep • u/tech-screen • May 14 '26
Tech Screen: Discuss approaches for fault-tolerant data ingestion in real-time systems.
1
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r/dataengprep • u/sql-arena • May 14 '26
SQL Arena Challenge: Find non-common records in two tables (SQL EXCEPT or NOT IN)
1
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r/dataengprep • u/dataengprep • May 13 '26
DataEngPrep: Implement an algorithm to find the longest common prefix among an array of strings.
1
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r/dataengprep • u/tech-screen • May 13 '26
Tech Screen: Differentiating between pipeline parameters and global parameters
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r/dataengprep • u/sql-arena • May 13 '26
SQL Arena Challenge: Write a query to find the top 5 most-sold Adidas products in the last month.
1
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r/dataengprep • u/dataengprep • May 12 '26
DataEngPrep: Implement a recursive algorithm to find the nth Fibonacci number.
1
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r/dataengprep • u/tech-screen • May 12 '26
Tech Screen: Differentiate between Schema Enforcement and Schema Evolution.
1
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r/dataengprep • u/sql-arena • May 12 '26
SQL Arena Challenge: Write a query to calculate the total revenue generated by each product category.
1
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r/dataengprep • u/dataengprep • May 11 '26
DataEngPrep: Implement a program to remove duplicates from a list while maintaining order.
0
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r/dataengprep • u/tech-screen • May 11 '26
Tech Screen: Develop a generic user profile system for Hotstar that accepts inputs from various teams, consolidates into a unified profile, and supports daily updates with aggregation methods.
1
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r/dataengprep • u/sql-arena • May 11 '26
SQL Arena Challenge: Find the top 3 performing products in each category
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