Cisco Restaurant + Bar Data Engineer Interview Questions

The questions to prepare for a Cisco Restaurant + Bar Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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SQL & Data ManipulationStart here. 4 questions · ~46 min

Find the second highest salary in each department without using aggregate functions.

Structured vs Unstructured Data BasicsEasy

Explain how structured and unstructured data differ in format, storage, and how easily they can be queried with SQL.

Data WranglingETL

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Daily Revenue and Top StoresMedium

Practice

Aggregate daily store revenue and return the top three stores per day using deterministic ranking.

Window FunctionsJoinsData Manipulation

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Coding5 questions · ~58 min

Reverse a singly linked list in-place using iterative pointer manipulation.

Binary Search on Sorted ArraysEasy

Explain how binary search works on a sorted array and why its time complexity is O(log n).

time complexityArraysSearching

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Pipelines4 questions · ~46 min

Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQuality

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CAP Theorem for Distributed DatabasesHard

Tests understanding of distributed systems tradeoffs and how they affect database design.

InfrastructureData ModelingQuality

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Behavioral & Leadership7 questions · ~81 min

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