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Updated weekly · Last refresh Aug 30

Grainger Corporate Services Software Engineer Interview Questions

The questions to prepare for a Grainger Corporate Services Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~8htotal time
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1
CodingStart here. 9 questions · ~82 min
Palindrome Check FunctionEasy
Practice

Determine if a string reads the same forward and backward using a two-pointer scan.

StringsTwo PointersGrainger Corporate Services
Longest Unique Substring in EnoMedium
Practice

Use a sliding window and hash map to find the longest substring without repeated characters in a string.

Hash TablesStringsTwo PointersGrainger Corporate Services
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2
Execution17 questions · ~155 min
Design Feature for Existing ApplicationMedium

Explain how you would design a new feature in an existing application while managing scope, trade-offs, and success criteria.

Trade-offsRoadmappingScope ManagementGrainger Corporate Services
Design a RESTful APIMedium

Tests API design principles, resource modeling, and practical contract considerations.

Trade-offsScope ManagementGrainger Corporate Services
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3
System Design5 questions · ~46 min
Real-Time Notification SystemHard

Tests system design skills for low-latency delivery, scalability, and reliability.

Feature StoreModel ServingGrainger Corporate Services
Track Customer Orders SystemHard

Evaluates your system design skills for order lifecycle tracking and consistency.

system designGrainger Corporate Services
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4
Behavioral & Leadership17 questions · ~155 min
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5
More topics2 questions · ~18 min
SQL vs NoSQL DifferencesEasy

Tests foundational database knowledge and when to choose each type.

JoinsData WranglingGrainger Corporate Services
Production Database MigrationsMedium

Tests safe rollout strategies, backward compatibility, and risk management.

InfrastructureDependenciesQualityGrainger Corporate Services
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.