Dataford
Dataford
Top 39
Company roadmap
Updated weekly · Last refresh Oct 17

Open Systems Technologies Interview Questions

The questions to prepare for Open Systems Technologies interviews, across all roles. Questions from real interview reports rank first. Updated daily.

39questions
~6htotal time
Track your progressSign up free to work through all 39 questions and resume where you left off.
Start practicing free →
1
CodingStart here. 3 questions · ~26 min
Reverse Linked List ComplexityEasy
Practice

Reverse a singly linked list in place using pointer reassignment with O(n) time and O(1) extra space.

time complexityLinked ListsData StructuresOpen Systems Technologies
More Coding questions with a free account
2
Execution3 questions · ~26 min
Design a Microservices Migration PlanHard

Plan a microservices migration by balancing delivery speed, service boundaries, and operational risk.

Trade-offsRisk AssessmentScope ManagementOpen Systems Technologies
More Execution questions with a free account
3
Behavioral & Leadership26 questions · ~222 min
More Behavioral & Leadership questions with a free account
4
More topics7 questions · ~60 min
Consistency Across Data SourcesMedium

Approach for keeping records aligned and trustworthy when multiple source systems feed the same pipeline.

InfrastructureQualityOpen Systems Technologies
Design ML-Driven Cache RankingHard

Design an ML-based caching system for a high-traffic e-commerce app that optimizes admission, refresh, and eviction under tight latency and freshness constraints.

InfrastructureModel ServingQualityOpen Systems Technologies
Optimize Production Query LatencyHard

Tests your approach to diagnosing and improving SQL performance under real production constraints.

performancequery optimizationdata integrityOpen Systems Technologies
Concurrency and Thread SafetyMedium

Tests your understanding of concurrent execution, race conditions, and safe shared-state design.

thread safetybasicsconcurrencyOpen Systems Technologies
Prospecting and Cold CallingMedium

Assesses your ability to generate pipeline through outbound prospecting and cold outreach.

cold callingOpen Systems Technologies
Reviewing Your Recent ExperienceMedium

Evaluates how clearly you summarize your recent experience and relevant finance exposure.

experienceOpen Systems Technologies
More questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Reproducible Analysis for ReviewMedium
Practice
Practice drill

Identify the latest reproducible analysis runs and summarize their review history with PostgreSQL joins, aggregation, and a CTE.

Data WranglingCTEsdata validationHelloFreshBooking
Detect Consecutive Losing StreaksMedium
Practice
Practice drill

Identify bet365 users with consecutive losing bets above a risk threshold using ordered streak grouping.

abuse trackingData Manipulationsql querybet365
The finish line: interview-readyComplete all 39 questions plus 3 hands-on drills to finish this plan.