iOS · 12 min
Apple iOS mock interview: a practice loop for 2026
An Apple iOS mock interview built honestly: what Apple's careers pages publish (little), a Swift-heavy practice loop, seven practice prompts and a rubric.
Mobile interview guides
Each guide follows a question past the first answer: what the interviewer is scoring, what a weak answer sounds like, what a senior one sounds like, and the follow-up that separates them.
By round: Mobile system design · Coding and live coding · Architecture · Senior and Staff · Swift, SwiftUI and UIKit · Kotlin and Jetpack Compose
43 guides, all free and complete.
iOS
iOS · 14 min
iOS architecture interview questions: defending a decision
Ten iOS architecture interview questions and how senior answers are scored: MVVM, TCA, navigation, dependency injection, SPM modules, testing.
iOS · 12 min
iOS coding interview: the tasks and how they are graded
What an iOS coding interview asks: the practical tasks that recur, the algorithm round in Swift, and what is graded beyond whether it compiles.
iOS · 18 min
iOS interview questions in 2026, round by round
iOS interview questions for 2026, organised by round: Swift, concurrency, memory, SwiftUI, UIKit, architecture, system design, testing, coding and behavioural.
iOS · 13 min
iOS mock interview: a full round you can run in 2026
A complete iOS mock interview you can run alone or with a partner: timing, eight prompts with follow-ups, a scoring rubric and how to self-score a recording.
iOS · 11 min
iOS technical interview: the rounds and what each scores
What an iOS technical interview loop contains, what each round scores, and where strong Swift candidates still lose it.
iOS · 16 min
Senior iOS interview questions for 2026, and the follow-ups
Twelve senior iOS interview questions for 2026: what each scores, a weak and a senior answer, and the follow-up on Swift 6 concurrency, SwiftUI, architecture.
iOS · 15 min
Senior iOS mock interview: a full loop for 2026
A senior iOS mock interview loop: four 45 to 60 minute rounds, escalating follow-ups, senior versus mid-level answers, a rubric and a debrief template.
iOS · 13 min
Swift interview questions and answers, as they are scored
Swift interview questions with spoken answers: value and reference types, protocols, generics, memory and errors, and the follow-up each one leads to.
iOS · 13 min
SwiftUI interview questions and what they score
SwiftUI interview questions on identity, state ownership, Observation and performance, each with the answer that scores, the trap and the follow-up.
iOS · 14 min
Top 10 iOS interview questions for 2026
The top 10 iOS interview questions in 2026, with what each one scores, a weak answer, a senior answer and the follow-up that separates the two.
iOS · 30 min
Top 100 iOS interview questions with answers (2026)
The top 100 iOS interview questions for 2026 with short answers, grouped by area: Swift, memory, concurrency, SwiftUI, UIKit, architecture, design and testing.
iOS · 24 min
Top 50 iOS interview questions and answers (2026)
The top 50 iOS interview questions for 2026, grouped by area, with what each question scores and a senior answer: Swift, concurrency, SwiftUI, UIKit and more.
iOS · 12 min
UIKit interview questions still asked in 2026
UIKit interview questions that still appear in iOS loops: lifecycle, layout passes, cell reuse, diffable data sources, and UIKit with SwiftUI.
Android
Android · 14 min
Android architecture interview questions: layers and modules
Ten Android architecture interview questions and how senior answers are scored: layers, the domain layer, UDF, Hilt, modules, navigation and testing.
Android · 12 min
Android coding interview: the tasks and how they grade
What an Android coding interview asks: the practical tasks to prepare, the algorithm round in Kotlin, and what is graded beyond a screen that works.
Android · 22 min
Android interview questions in 2026, round by round
Android interview questions for 2026, organised by round: Kotlin, coroutines, Compose, lifecycle, architecture, system design, testing, performance, security.
Android · 15 min
Android mock interview: a full script with a rubric
A complete Android mock interview to run alone or with a partner: timings, eight prompts with follow-ups, a scoring rubric and how to self-score a recording.
Android · 16 min
Android technical interview questions and answers
Android technical interview questions and answers: lifecycle, process death, coroutines, data, security and testing, with the follow-up to each.
Android · 14 min
Jetpack Compose interview questions and follow-ups
Compose interview questions on recomposition, state, side effects and performance, with the weak answer, the answer that scores and the follow-up.
Android · 17 min
Kotlin coroutines interview questions, and the follow-ups
Kotlin coroutines interview questions for 2026: structured concurrency, cancellation, exceptions, dispatchers, Flow and testing, with weak and senior answers.
Android · 13 min
Kotlin interview questions for Android engineers
Kotlin interview questions as Android loops ask them: null safety, coroutines, cancellation, Flow, sealed types and generics, with each follow-up.
Android · 16 min
Senior Android interview questions and what follow-ups test
Twelve senior Android interview questions with what each scores, a weak and a senior answer, and the follow-up: coroutines, Flow, Compose, process death.
Android · 24 min
Top 50 Android interview questions, with short answers
The top 50 Android interview questions for 2026, grouped by area: Kotlin, coroutines, Compose, lifecycle, architecture, data, performance, security, design.
Mobile system design
Mobile system design · 15 min
Android system design interview: designing for the platform
What an Android design round adds: process death, WorkManager, Doze, FCM priority and Room as source of truth, with a worked chat design and its follow-ups.
Mobile system design · 15 min
iOS system design interview: platform details that matter
What an iOS design round adds: background limits, background URLSession, storage, image pipelines and push, with a worked photo feed design.
Mobile system design · 12 min
Mobile caching system design interview: the image loader
How to design caching in a mobile system design interview: memory and disk tiers, eviction, invalidation, HTTP caching and the image loader prompt.
Mobile system design · 17 min
Mobile system design interview: how the round is scored
How a mobile system design round runs, the seven things a senior answer covers, a worked offline sync example, and how Senior and Staff are scored.
Mobile system design · 14 min
Offline-first mobile system design for the interview
How to design offline-first sync in a mobile system design interview: local source of truth, the outbox, conflict rules, clocks and migration on device.
Live coding
Live coding · 14 min
Mobile live coding interview: what to say while you type
How a mobile live coding round is scored, a 45-minute plan, what to say at each stage, a worked Swift example, and how to recover when you stall.
Live coding · 10 min
Pair programming interview: what gets scored
How a pair programming interview differs from live coding, what the interviewer scores when they type with you, and how to take and give the keyboard.
Flutter
Flutter · 15 min
Flutter and Dart interview questions and answers
Flutter interview questions and answers on widgets, state, navigation and testing, plus Dart questions on async, the event loop and null safety.
Flutter · 10 min
Flutter architecture interview questions and costs
Flutter architecture interview questions on layering, state ownership, packages and testing, with the decision each one tests and what it costs a team.
Flutter · 12 min
Flutter machine coding interview: tasks and grading
What a Flutter machine coding interview asks, how the build is graded, and the state and structure choices that decide it before the UI is finished.
Flutter · 15 min
Senior Flutter interview questions and follow-ups
Twelve senior Flutter interview questions on rendering, keys, state, isolates, platform channels and architecture, with the follow-up to each.
React Native
React Native · 14 min
React Native interview questions and answers
Twelve React Native interview questions on rendering, lists, effects, the New Architecture, Hermes and storage, with what is scored, the trap and the follow-up.
React Native · 13 min
Senior React Native interview questions and follow-ups
Ten senior React Native interview questions on migration, startup, retries, old app versions, feature flags and native rewrites, with the follow-up to each.
Senior and Staff loops
Senior and Staff loops · 12 min
Amazon mobile mock interview: practise the loop in 2026
An Amazon mobile mock interview built on Amazon's published SDE prep: assessment, four 55-minute rounds, Leadership Principles, six prompts and a rubric.
Senior and Staff loops · 13 min
FAANG mobile mock interview: a full loop to practise in 2026
A FAANG mobile mock interview you can run with a partner: what Google, Meta, Amazon and Apple publish about their loops, seven practice prompts and a rubric.
Senior and Staff loops · 12 min
Google mobile mock interview: practise the loop in 2026
A Google mobile mock interview based on what Google's careers pages publish: shared-doc coding, design and behavioural rounds, six practice prompts and a rubric.
Senior and Staff loops · 12 min
Meta mobile mock interview: a practice loop for 2026
A Meta mobile mock interview based on what Meta's careers pages publish: a 45-minute screen, a full loop, six practice prompts, follow-ups and a scoring rubric.
Senior and Staff loops · 11 min
Mobile architecture interview questions, any platform
Architecture interview questions that do not depend on the platform: modules, shared code, server-driven UI, flags, old app versions and who owns what.
Senior and Staff loops · 15 min
Staff mobile system design interview, scored against Senior
How I decide Staff vs Senior in a mobile system design loop: the questions I ask, what each level answers, the follow-ups, and how down-levelling happens.