The 24-Hour iOS Interview Answer Book
Senior answer cards
The 24-Hour iOS Interview Answer Book
Review the questions. Rehearse the answer.
This is a fast, practical interview-prep reference for iOS developers who already know how to build apps but need strong answers under pressure.
In 24 hours, you can review the highest-frequency senior iOS topics, memorize clean wording, understand the traps and rehearse how to recover when pushed.
It is the field manual you use when the interview is close: ranked questions, short answers, senior answers, weak answers, interviewer pushes, recovery lines and what earns the point.
Instant PDF and EPUB download. Secure checkout via Gumroad. Lifetime updates.
What this book helps with
Everything between the app and the system around it.
Most candidates do not lose points because they know nothing.
They lose points because their answer collapses under follow-up.
Why this book exists
Over more than 15 years, I have watched good engineers lose interview signal after the first follow-up, not because they knew nothing, but because their wording collapsed under pressure.
Definitions get you into the conversation. Follow-ups, tradeoffs, traps and recovery lines decide whether you sound mid-level, senior or staff.
This book exists for that last mile: the moment when you do not need another tutorial, you need the exact shape of the answer and a way to recover cleanly when pushed.
What is inside
From where you are to the next level.
Swift Core
Optionals · Protocols · Generics · Codable · some vs any
Memory and ARC
Retain Cycles · weak vs unowned · Closures · Leaks
Concurrency
async/await · Actors · Sendable · Cancellation · MainActor
SwiftUI
State · Observation · Identity · Rendering · Performance
Architecture
MVVM · Clean · Coordinators · DI · Modularization
Leadership
Failure Stories · Mentoring · Disagreement · Scope
The framework
The Answer Card
- Short Answer
- Senior Answer
- Trap
- Follow-up
- Recovery
Each question turns knowledge into interview-ready wording.
Product proof
What you can inspect before buying.
Each book page shows the method, the scope, and the kind of transformation the material is designed to create. Real reader testimonials are only shown when genuine quotes are available.
Sample pages
Open the in-page sample reader and inspect the interior before purchasing.
Before / after
Concrete examples show how weak signals become senior-level answers.
The 24-Hour iOS Interview Answer Book
Senior answer cards
Sample chapter
Read the first pages inside the site.
Open the in-page reader to flip through the real first pages, exported straight from the book sample.
The roadmap
Where this fits
- 01Get Found
- 02Build
- 03Interview
- 04Answer PracticeYou are here
- 05System Design
- 06Staff Systems
- 07Build With AI
- 08Lead
- 09Architect
Before / After
Swift concurrency
Before
Actors make code thread-safe.
After
Actors protect isolated mutable state, but they do not make every interaction automatically safe.
I would still reason about reentrancy, Sendable boundaries and cancellation.
SwiftUI state
Before
Use StateObject for view models.
After
I choose the wrapper based on ownership.
If the view creates and owns the object, StateObject is appropriate. If it receives it, ObservedObject or environment-style injection is usually cleaner.
Reader reviews
What readers say
“The interview doesn't start when they ask the question. It starts when they challenge your answer. I kept preparing definitions; interviewers kept asking about trade-offs and failure modes. For the first time in years, I walked in prepared for the conversation, not just the questions.”
“The cards are about a page each but cover exactly what interviewers ask. I read the token-refresh section the night before and got almost that exact discussion in the loop.”
“Instead of saying 'I'd use MVVM,' I started explaining why I'd choose it and when I wouldn't. That changed the entire conversation in my interviews.”
“The hardest part was knowing how much detail to give. The short answers and live wording finally gave me a structure instead of talking until I ran out of ideas.”
Reviews shared with permission from readers of The 24-Hour iOS Interview Answer Book.
Who this is for
- Mid-Level iOS Engineer
- Senior iOS Engineer
- Lead Candidate
- Staff Candidate
- Interview in 24-72 hours
Not for
- Are still learning beginner iOS
- Need a full Swift tutorial
- Want theory without interview practice
About me
Mike Salari
Staff Mobile Engineer · Mobile Architect · Technical Author
I wrote this for the last-mile pressure of senior iOS interviews, where wording, tradeoffs and recovery matter as much as raw knowledge.
- 15+ years
- Building production mobile software
- Production scale
- High-trust consumer and enterprise mobile systems
- Mentor
- Engineers helped through interviews, growth and senior-level decisions
- Ex-Cisco & Mastercard
- Plus experience across Apple, Adobe and Visa
Published author of The iOS Interview Blueprint.
Read the full storyWalk in with answers that hold up.
Use the answer cards to rehearse the topics interviewers ask, the traps they set and the recovery lines that keep you credible.
Instant PDF and EPUB download. Secure checkout via Gumroad. Lifetime updates.
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