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Updated weekly · Last refresh Aug 30

HashedIn Software Engineer Interview Questions

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

50questions
~9htotal time
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1
CodingStart here. 14 questions · ~149 min
Detect a Linked List LoopEasy
Practice

Use Floyd's tortoise-and-hare algorithm to detect whether an Equifax review chain contains a linked-list cycle.

RecursionLinked ListsTwo PointersHashedIn
Linked List ReversalEasy
Practice

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

RecursionLinked ListsArraysHashedIn
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2
SQL & Data Manipulation13 questions + 2 drills · ~159 min
Second Maximum Salary QueryEasy
Practice

Use DENSE_RANK and a LEFT JOIN to find active HashedIn employees earning the second-highest distinct salary.

sql queriesHashedIn
SQL Queries and Database ProblemsMedium

Assesses practical SQL and database problem-solving approach.

databasesqlHashedIn
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
SQL Query for Expected ResultsMedium
Practice
Practice drill

Use LEFT JOINs, a CTE, and aggregation to summarize 2025 claims and completed payments for active Guidewire PolicyCenter policies.

databasesqlGGuidewire Software
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3
System Design13 questions · ~139 min
Designing Stack Overflow DatabaseHard

Assesses database design skills and modeling for a large Q&A platform.

databasedesignHashedIn
Designing Fleet Management SystemHard

Assesses system design skills for a fleet management use case and tradeoffs.

designHashedIn
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4
Execution6 questions · ~64 min
Process Turnaround TimeMedium

Assesses your understanding of CPU scheduling concepts and turnaround time calculations.

turnaround timeHashedIn
Handle a Multi-Round AssessmentMedium

Assesses performance under multi-round pressure across systems and coding topics.

system designtechnical interviewHashedIn
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5
Behavioral & Leadership4 questions · ~43 min
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.