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Updated weekly · Last refresh Sep 15

Apple Backend Engineer Interview Questions

The questions to prepare for a Apple Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

50questions
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1
CodingStart here. 17 questions · ~238 min
Top K Smallest DistancesMedium
Practice
Recently asked

Use a min-heap to return the K smallest-distance pairs from a sorted integer array.

ArraysArray ManipulationAlgorithmsApple
Crawl URLs with BFSMedium
Practice

Use BFS to crawl linked HTML pages and build a URL-to-content map without revisiting URLs.

deduplicationbfsAlgorithmsApple
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2
System Design17 questions · ~238 min
Online Block Diagram EditorHard

Design a real-time collaborative block diagram editor that supports multiple users and an infinite canvas.

latencydistributed systemsoffline syncApple
Distributed Cache SystemHard

Explain a distributed cache you built, including eviction, replica consistency, observability, and completion criteria.

latencydistributed systemsfailure modesApple
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3
Execution9 questions · ~126 min
Optimize Java Loop for PerformanceMedium

Improve Java summation code by addressing LinkedList indexing, boxed primitives, and unnecessary memory allocations.

code maintainabilityExecutionbottlenecksApple
React GDP VisualizationMedium

Plan and deliver a React page that presents GDP data clearly while handling data sourcing, loading states, and validation.

automated testingapi designApple
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4
Behavioral & Leadership5 questions · ~70 min
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5
More topics2 questions · ~28 min
SQL Top-N Per DepartmentEasy
Practice

Use ROW_NUMBER and a department join to identify the three highest-paid Hexaware employees per department.

JoinsRankingAggregationsApple
SQL vs NoSQL Trade-offsEasy
Recently asked

Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.

JoinsData WranglingAggregationsApple
Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.