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Updated weekly · Last refresh Aug 30
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Cook Systems Software Engineer Interview Questions

The questions to prepare for a Cook Systems Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

31questions
~5htotal time
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1
CodingStart here. 10 questions · ~92 min
Find Two Sum IndicesEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysSortingCCook Systems
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysCCook Systems
Core Java for ScalabilityMedium

Assesses Java fundamentals and how you apply them to scalable software design.

javascalabilityCCook Systems
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2
SQL & Data Manipulation3 questions + 3 drills · ~57 min
Optimize a Slow SQL QueryHard

Tests advanced SQL tuning and ability to improve performance while preserving results.

SubqueriesJoinsCTEsCCook Systems
SQL vs NoSQL DatabasesEasy

Tests your foundational understanding of database models and when to use each.

JoinsData WranglingCTEsCCook Systems
Purpose of Database IndexingEasy

Tests understanding of indexing tradeoffs and how it impacts query performance and write overhead.

JoinsData WranglingAggregationsCCook Systems
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
Unify CRM and Google Analytics ViewHard
Practice
Practice drill

Merge CRM orders with GA events via an identity map to build a customer-level view using joins, window functions, and monthly rollups.

SubqueriesJoinsData WranglingArtefact
Optimize Dashboard Revenue Join QueryHard
Practice
Practice drill

Optimize a multi-join dashboard query using CTEs and window functions to reduce repeated work.

JoinsData WranglingCTEsApptio
3
Behavioral & Leadership16 questions · ~147 min
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4
More topics2 questions · ~18 min
Designing a Simple CacheMedium

Evaluates your system design thinking around performance, correctness, and eviction.

system designperformancecachingCCook Systems
Implementing a Basic APIMedium

Assesses API design and implementation fundamentals for production-ready services.

api designsystem architectureimplementationCCook Systems

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The finish line: interview-readyComplete all 31 questions plus 3 hands-on drills to finish this plan.