What are good iOS developer interview questions?

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iOS developer interview questions

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What’s a good IOS developer interview question?

From asking about the difference between NSArray and NSMutable to Apple’s Design Principles, here are the 11 responses to the question, “What’s a good IOS developer interview question?”

  • What’s The Difference Between NSArray and NSMutable?
  • What’s Your Process for Troubleshooting and Debugging?
  • How Could You Set Up Live Rendering?
  • What are the Differences Between Objective-C and Swift?
  • Which Are the Ways of Achieving Concurrency in IOS?
  • What IOS App Do You Think is Excellent and Why?
  • How Do You Add An App to the App Store?
  • Describe The Most Innovative App You’ve Built
  • How is Bundle ID Different from App ID?
  • What’s The Difference Between Static Typing and Dynamic Typing?
  • What Are Apple’s Design Principles?

What’s The Difference Between NSArray and NSMutable?

The difference between those two is quite straightforward but it is, nonetheless, the kind of question that should find its way to the interview at most employment levels. Even Junior IOS developers should know that NSMutable allows us to change, add, and remove the values in the array. while NSArray is for data that shouldn’t change in any way. It’s a good question to see roughly at what level the candidate’s knowledge is.

Natalia Brzezinska, Marketing & Outreach Manager, US Passport Photo

What’s Your Process for Troubleshooting and Debugging?

Here is a potential interview question for an iOS developer:”Describe a time when you had to troubleshoot and fix a particularly difficult bug in your iOS app. Walk me through the steps you took to identify and resolve the issue.”This question can help the interviewer understand the candidate’s problem-solving skills and their ability to identify and fix issues in their iOS code. It can also provide insight into the candidate’s technical proficiency and attention to detail.

Jake Smith, Managing Director, Absolute Reg LTD

How Could You Set Up Live Rendering?

As someone with a personal history of interviewing potential IOS developers, a good question to gauge the candidate’s experience and knowledge is How could you set up Live Rendering?

Although not a simple question, this inquires into their ability to think on their feet and understand the logistical aspects of setting up an app. It is also a great indicator of how well they understand how application components interact with each other to create the desired outcome.

This is one of the main skill sets required for any successful IOS developer and it’s important that you get insights into it during an interview.

Lorien Strydom, Executive Country Manager, Financer.com

What are the Differences Between Objective-C and Swift?

I have many developers on retainer after founding a mobile app that syncs up with many virtual platforms for my teambuilding events. Asking the differences between Objective-C and Swift allows the interviewee to demonstrate their knowledge of the two main programming languages used for iOS development and their ability to make informed decisions about which language is best suited for any one of my given projects.

Will Gill, Event Entertainer, DJ Will Gill

Which Are the Ways of Achieving Concurrency in IOS?

A good iOS developer interview question would be to ask the candidate, “Which are the ways of achieving concurrency in IOS?”. This can help assess their knowledge and experience developing applications for Apple’s mobile operating system. The answer should include information about Dispatch queues, Threads, and Operation queues.

Kate Wojewoda-Celinska, Marketing Manager, Spacelift

What IOS App Do You Think is Excellent and Why?

“Name an IOS app you think is excellent, and explain why.” This is a question that really works for any type of skill-based role, because it allows you to get an idea of a candidate’s style and perspective. By asking them who is doing the job correctly, you can see what their benchmark is for quality and how it aligns with your own. It also gives you an opportunity to see how they speak objectively when they’re not trying to sell themselves as a candidate, which can be helpful in evaluating them as a possible fit.

Brian Munce, Managing Director, Gestalt Brand Lab

How Do You Add An App to the App Store?

Can you explain the process of submitting an app to the App Store?One potential interview question for an IOS developer is: “Can you explain the process of submitting an app to the App Store?” This question can help gauge the candidate’s familiarity with the app submission process. However, examining a candidate’s knowledge is only one of the goals you want to achieve by asking this. What you genuinely want to discover is a candidate’s ability to communicate technical information clearly and effectively.

Simply explaining complex information is one of the essential skills for this position. An IOS developer must be able to communicate effectively with other team members who are not familiar with the IOS world, such as designers, project managers, and quality assurance engineers.

Additionally, communication can help the developer explain technical concepts to non-technical clients and stakeholders, which can be crucial for ensuring the project’s success.

Nina Paczka, Community Manager, Live Career

Describe The Most Innovative App You’ve Built

While there are a wide variety of questions to ask when interviewing an iOS developer – from technical knowledge to soft skills and beyond – one great question, to begin with, is “Describe the most innovative app you’ve built.”

This gives insight into their experience level and shows how they think outside of the box when it comes to solving programming challenges and building dynamic products. After all, innovation is the key to creating high-quality apps that truly stand out!

Mina Elias, Founder and CEO, Trivium

How is Bundle ID Different from App ID?

Every iOS developer should know the answer to this question. Each App is identified by its bundle ID, which is determined in Xcode. Various targets and multiple apps can be produced by a single project. It has both free and paid versions and is branded in a variety of ways.

A single developer team’s apps can be identified by their App ID. Team ID is separated from the bundle IF search string by a period (.) in this two-part string. While Apple provides the Team ID, the developer is the one who will provide a bundle ID search string.

Shawn Mahaffey, Founder, Wingit

What’s The Difference Between Static Typing and Dynamic Typing?

As someone who has experience interviewing IOS developers, I can tell you that one of the most useful questions to ask them is What is the difference between static typing and dynamic typing? This allows the person being interviewed to demonstrate their knowledge of programming languages such as Objective-C and Swift, which are both used heavily in IOS development.

Asking this question also gives insight into whether they have a fundamental understanding of programming concepts – an important factor to consider when hiring an IOS developer.

Douglas McShane, Director, Newcastle First Aid Courses

What Are Apple’s Design Principles?

Although this question looks simple, it is a good one. Understanding Apple’s design principles and application interface guidelines is the starting point for developing an acceptable app Apple users will appreciate. These principles revert to the developer in very precise terms on how the interface of an iOS app should feel and look, as well as the programming and functionality methodologies to be used.

Not understanding these principles and application interface guidelines will likely result in developing an app that’s not in tune with Apple’s standards. Thus, leading to compatibility issues, as well as declined requests to get featured on the Apple app store.

AJAYI Ayomide, Growth Marketer & Writer, Howsociable

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