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Prep plan
Updated weekly · Last refresh Aug 30

CloudFactory Software Engineer Interview Questions

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

50questions
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1
CodingStart here. 13 questions · ~146 min
Check Binary Tree BalanceEasy
Practice

Use postorder recursion to determine whether a binary tree is height-balanced in O(n) time.

RecursionSearchingTreesCloudFactory
Implement Breadth-First SearchEasy
Practice

Return the breadth-first visitation order from an NAU campus location represented as a directed adjacency-list graph.

QueueSearchingGraphsCloudFactory
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2
SQL & Data Manipulation9 questions + 1 drill · ~111 min
SQL Join Matching RowsEasy
Practice

Filter Revature assessment records to find candidates who passed SQL Fundamentals, then sort the matching rows by candidate name.

SubqueriesJoinsData WranglingCloudFactory
Finding Duplicate RecordsEasy
Practice

Find duplicate customer emails using GROUP BY and HAVING in PostgreSQL.

Group ByHavingAggregationsCloudFactory
Top Customers SQL QueryEasy
Practice
Practice drill

Aggregate customer sales volume and return Pyramid Consulting's top 10 customers in descending order.

RankingGroup ByAggregationsPyramid ConsultingBNYCambia Health Solutions
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3
System Design6 questions · ~67 min
Design Cold Start for RecommendationsHard

Design a recommendation system strategy for model cold start and new-user cold start, including serving, evaluation, and safe rollout.

Cold StartRetrievalTwo-Tower ModelsCloudFactory
Design Feature Drift Monitoring SystemHard

Design a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.

Feature StoreFeature DriftModel ServingCloudFactory
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4
Pipelines7 questions · ~79 min
Batch vs Streaming Data ProcessingEasy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingCloudFactory
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5
Execution12 questions · ~135 min
Discuss Architecture Pattern ChoicesEasy

Explain which architecture patterns you have used, how you chose among them, and how you managed delivery trade-offs.

InfrastructureTrade-offsRoadmappingCloudFactory
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6
Behavioral & Leadership3 questions · ~34 min
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The finish line: interview-readyComplete all 50 questions plus 1 hands-on drill to finish this plan.