Top 50

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Updated weekly · Last refresh Nov 2

Top 50 iOS Interview Questions

The most frequently asked iOS questions across all roles and companies, ranked by real interview frequency. Updated daily.

50questions

~7htotal time

36companies covered

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Technical FundamentalsStart here. 40 questions · ~320 min

Native UI vs Custom Drawing Trade-offsHard

Recently asked

Compare native UI components with custom drawing frameworks across accessibility, performance, maintainability, and platform integration.

android lifecycleiOSTrade-offs

Instacart

Robinhood

MDM Role in EnterpriseMedium

Explains how Apple MDM uses enrollment, APNs, profiles, and Apple Business Manager to manage enterprise devices.

iOSStakeholder ManagementCommunicationJJamf

Apple

SwiftUI vs UIKit ChoiceHard

Compare SwiftUI's declarative state-driven model with UIKit's imperative view-controller model and choose appropriately.

iOSswiftuiMobile Platformmmomox

CGI

iOS View Controller LifecycleHard

Tests UIKit view controller lifecycle callbacks, ARC ownership, and preventing retain cycles.

memory managementmemory leakiOS

CGI

ServiceTitan

Testing Legacy CodebasesHard

Recently asked

Tests how to introduce XCTest and XCUITest coverage safely around tightly coupled legacy Swift code.

iOStest coverageTesting

Apple

Core Signal Processing ConceptsHard

Assess signal-processing fundamentals and whether the candidate can apply sampling, filtering, FFTs, and noise analysis in real systems.

iOStechnical fundamentalsRuntime Performance

Apple

Advanced Mobile Debugging and ProfilingHard

Explain how advanced Android and iOS profilers identify CPU, memory, rendering, threading, and lifecycle problems.

profilingmobile developmentiOS

Walmart

Testing for Reliability and PerformanceMedium

Tests whether the candidate can combine functional, failure, load, and performance testing into a measurable reliability strategy.

iOSperformanceTesting

Apple

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Behavioral & Leadership5 questions · ~40 min

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System Design3 questions · ~24 min

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