Shell Data Engineer Interview Questions
The questions to prepare for a Shell Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Reverse a singly linked list in place using an iterative pointer update or recursion.
ShellUse a hash map to find two array elements that sum to a target in O(n) time.
ShellImplement BFS to traverse a graph level by level from a given start node.
ShellFind the second highest salary in each department without using aggregate functions.
ShellExplain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.
ShellAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
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Benjamin MooreCompute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.
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Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.
ShellCompare ETL and ELT, and explain when ELT is the better pipeline pattern.
ShellApproach for maintaining data quality and integrity across ETL pipelines.
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