iOS developer interview questions and tests

Recommended roles for iOS developer interview questions and online tests

The iOS developer is one of the most popular positions nowadays, so you may have many CVs from several candidates. Sadly, that doesn’t automatically mean you’ll succeed in finding the right one. To make your work fruitful, you need to ask the right iOS developer interview questions, which allow you to verify whether the candidate is likely to succeed or not. 

DevSkiller iOS developer interview questions and tests are designed for programmers who have experience in iOS across all seniority levels. Because they are powered by RealLifeTesting™ methodology, our tests and questions assess all the necessary iOS developers’ skills with tasks resembling everyday work.

Technologies covered:

Platform: iOS

Programming language: Swift, Objective-C

Build tools: Xcode

iOS
SENIOR
Tested skills
Duration
75 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Swift, iOS

Programming task - Level: Hard

iOS | Swift | NSA Cipher Tool - Solve the 3 cryptographic puzzles to take the dream position as a programmer in the NSA.

Available in Team and Enterprise plans

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Swift
MIDDLE
Tested skills
Duration
48 minutes max.
Evaluation
Manual
Test overview

Choice questions

assessing knowledge of Swift, iOS

Code gaps

assessing knowledge of Swift, Unicode, iOS

Code review task - Level: Medium

iOS | Swift | BookDataAnalyst - Please perform a code review of this code. Pay attention to the quality and compliance with the best practices.

Available in Team and Enterprise plans

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iOS
MIDDLE
Tested skills
Duration
126 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of iOS, Swift

Programming task - Level: Medium

iOS | Swift | Book Keeper App - Initialize the Core Data Stack, including saving and generic item fetching and implement additional functionality by filling out the missing methods and fixing the UI functionality.

Available in Team and Enterprise plans

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iOS
SENIOR
Tested skills
Duration
165 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Swift, iOS

Programming task - Level: Hard

iOS | Swift | Book Keeper App - Initialize the Core Data Stack to work concurrently, including saving on a background thread and generic item fetching on the main thread; implement additional functionality by filling out the missing methods and fixing the UI functionality so that a user would be able to add or edit Company items and Invoices; implement the search functionality in both views. Lastly, he will need to limit the textField entry appropriately in order to pass the tests.

Available in Team and Enterprise plans

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iOS
JUNIOR
Tested skills
Duration
55 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of iOS, Swift

Programming task - Level: Easy

IOS | Swift | Weather App - Build an app which analyzes weather data received from a weather service backend. The candidate must read the JSON file provided, create a data model, parse it and fill out the missing functions to retrieve the required weather conditions from the model.

Available in Team and Enterprise plans

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iOS
MIDDLE
Tested skills
Duration
80 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of iOS, Swift

Programming task - Level: Medium

iOS | Swift | CoffeHouse Analyst App - Implement the functionality of analising the given data for the management by filling out the missing functions.

Available in Team and Enterprise plans

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SENIOR
Tested skills
Duration
100 minutes max.
Evaluation
Automatic
Test overview

Programming task - Level: Hard

iOS | Swift | Conference App Senior - Implement a network service that is used to interact with the server.

Programming task - Level: Hard

Android | Async call from native to Java via JNI - Provide the missing JNI part of the native-Java communication combo that fulfills the certain requirements.

Available in Team and Enterprise plans

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JUNIOR
Tested skills
Duration
70 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Java, Android, iOS

Programming task - Level: Easy

Android | Style Basics - Implement a Style that can be re-used with a number of TextView widgets.

Programming task - Level: Easy

iOS | Swift | Water Power Plant Application - Implement the missing functions in the application for the analysis of data from a hydroelectric power plant.

Available in Team and Enterprise plans

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Android
MIDDLE
Tested skills
Duration
72 minutes max.
Evaluation
Automatic
Test overview

Choice questions

assessing knowledge of Android, iOS

Programming task - Level: Medium

Android | Reminder app - Implement missing features in the Reminder application using BroadcastReceivers, Services, Intent scheduling using AlarmManager and Notifications API.

Programming task - Level: Medium

iOS | Swift | Students details applicaction - Implement an app maintaining student details in a file and allowing users to query the file in order to retrieve specific data.

Available in Team and Enterprise plans

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The right iOS interview questions and online tests to screen iOS developers

Recommended roles for iOS interview questions and online tests

  • iOS developer
  • Mobile developer
  • Objective C developer
  • Junior mobile developer
  • Senior mobile developer
  • Mobile app developer
  • Swift developer
  • Junior iOS developer
  • Senior iOS developer

How our iOS interview questions work

Powered by the RealLifeTesting™ methodology, DevSkiller iOS interview questions and online tests will help you find the most qualified iOS developers. Our online tests go further than assessing your candidate’s academic ability by placing them in real-world scenarios and asking them to build or add new features to an application using the different technologies of iOS. Test iOS developers in both Objective-C & Swift within a single test and determine their coding ability, business logic, and time-management. 

Key features

  • Test software development skills and not just academic knowledge 
  • Convenient remote testing that can be taken anywhere, anytime
  • The RealLifeTesting™ methodology creates a better user experience and allows candidates to develop software, using their own IDE, clone to GIT, access Stack Overflow/Github/Google for research, and run unit tests.
  • Strict anti-plagiarism tools that ensure test accuracy
  • Automated test results that non-technical recruiters can understand
  • Tests available for junior, middle and senior iOS developers 

What to look for in an iOS developer

iOS is the operating system for most Apple products outside of their computers. Initially conceived to power the iPhone, Apple has used this operating system to power several other devices, including the iPad, Apple Watch, and Apple TV. When you talk about an iOS Developer, you’re actually talking about a developer who uses one or both languages, which are proprietary to iOS – Objective-C and Swift. 

iOS developers who have experience in projects such as Bluetooth, local databases, and working with location services is a positive sign. Another huge plus is if they’ve developed an app that can be verified on the iOS app store. Experience in another programming language such as C++ is also a good sign. Finally, first-hand experience with a specific platform (e.g. Apple Watch) is an excellent indication of a qualified candidate. 

Skills covered in our iOS interview questions

  • iOS
  • Objective-C
  • Swift
  • Ulkit
  • Swift 4
  • Unicode
  • Core Data
  • Concurrency
  • C,
  • Java
  • JNI
  • UI

Build your own custom tests 

Want to test iOS developers with your own custom test? No problem. The DevSkiller task wizard allows you to build custom tests using your own codebase. Find the perfect candidate with our iOS interview questions and online tests, that can be taken anywhere in the world, any time.