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Drw Holdings Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 17 questions · ~159 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersDrw Holdings
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingDrw Holdings
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2
System Design8 questions · ~75 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingDrw Holdings
Scaling a Web ApplicationHard

Tests system design thinking for scalability, reliability, and performance under increased load.

system designcloud architecturedistributed systemsDrw Holdings
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3
Execution3 questions · ~28 min
Debug Performance in Web AppsMedium

Tests your ability to diagnose performance bottlenecks using data, profiling, and systematic troubleshooting.

Trade-offsRisk AssessmentDrw Holdings
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4
Security & Infrastructure13 questions · ~122 min
Safe Thread Data ExchangeHard

Tests synchronization mechanisms and ability to avoid race conditions and deadlocks.

Networkingtechnicalos internalsDrw Holdings
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5
SQL & Data Manipulation3 questions + 3 drills · ~58 min
SQL: Travel Fee by DayEasy

Assesses SQL ability to filter and aggregate time-based data correctly.

sqlAggregationsDrw Holdings
SQL Top N QueryEasy
Practice
Practice drill

Return the 10 most-viewed active California physician profiles using WHERE, ORDER BY, and LIMIT.

RankingSortingAggregationsDoximity
SQL Sort QueryEasy
Practice
Practice drill

Sort Thales Ground Master radar readings by signal strength in ascending order, placing unknown values last.

SortingsqlThales
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
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6
Behavioral & Leadership5 questions · ~47 min
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7
More topics1 question · ~9 min
Real-Time Data Processing DesignHard

Tests real-time pipeline design tradeoffs for low latency, correctness, and throughput in trading.

Stream ProcessingOrchestrationPipelinesDrw Holdings
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.