Swift interview preparation, with questions and answers, cheat sheets, examples...

Last update: Aug 21, 2022

Overview

Swift-Interview

Hello every one, in this repo I'm preparing for my swift thecnical question, so you'll find examples and frequently asked questions about :

Unwrapping optional

Classes & structures

Bounds vs. Frame

Error handling, do, try, catch

Concurrency and Threading

Filter, Map, Reduce

Observer & Notification Pattern

Delegate Protocol

Gesture Recognizer

Retain Cycle, Automatic Reference Counting, Memory Leak

and more will be added as soon as I learn, This repo is public so if It's helpfull don't foget to star and follow me.

Comments

Proposals for interview questions
Bounds vs. Frame

When the bounds origin is not equal to (0, 0)? Which UI elements in standard library deal with the bounds origin? Check out this answer on stackoverflow for reference.

Classes & structures

Where are stored instances of classes and structures (heap, stack)?

What is copy-on-write, copy-on-assignment?

What are other examples of reference types (besides classes) and value types (besides structures)?

Concurrency and Threading

Can we create more threads than amount of cores on the device?

What are .sync, .async and the difference between them?

What is the difference between threads and queues?

How many default queues we have, which of them are serial, which of them are concurrent?

Common problems of concurrency (race condition, priority inversion, deadlock, thread explosion)?

Synchronization Primitives (I think it is important to know at least NSLock, NSRecursiveLock, Dispatch Semaphores, using queues, Barrier)

How to create custom GCD queue?

Unwrapping optional

consider adding some info about what optional is in the first place

for guard let topic your example is wrong, there is no guard let statement at all

there is another one way of unwrapping optional - nil coalescing operator

consider adding info about implicitly unwrapped optionals
opened by ruslangazizov 0

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Swift interview preparation, with questions and answers, cheat sheets, examples...

Related tags

Overview

Swift-Interview

Unwrapping optional

Classes & structures

Bounds vs. Frame

Error handling, do, try, catch

Concurrency and Threading

Filter, Map, Reduce

Observer & Notification Pattern

Delegate Protocol

Gesture Recognizer

Retain Cycle, Automatic Reference Counting, Memory Leak

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Comments

Proposals for interview questions

Bounds vs. Frame

Classes & structures

Concurrency and Threading

Unwrapping optional

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