Prepare for your iOS Developer interview. Understand the required skills and qualifications, anticipate the questions you may be asked, and study well-prepared answers using our sample responses.
This question can help the interviewer understand how you interact with your coworkers and whether you’re comfortable working as part of a team. Your answer should show that you enjoy collaborating with others, but also that you have strong communication skills and are able to take the lead when necessary.
Answer Example: “I’m very comfortable working with a team of developers to create an app. I have extensive experience working with teams of developers on large-scale projects, and I’m confident in my ability to collaborate and communicate effectively with my colleagues. I understand the importance of teamwork and collaboration in order to create high-quality software, and I am willing to take on whatever role is necessary in order to ensure that we meet our goals.”
This question is your opportunity to show the interviewer that you have a strong understanding of the skills needed for this role. You can answer this question by listing the most important skills for an iOS developer, explaining why they’re important and providing examples of how you’ve used those skills in the past.
Answer Example: “The two most important skills for an iOS developer are programming knowledge and communication skills. Programming knowledge is essential because it allows me to create high-quality code that’s bug-free and efficient. I also need to be able to communicate effectively with other team members, as well as stakeholders and customers.”
This question can help the interviewer understand how you interact with other members of a team. Your answer should show that you value collaboration and are willing to work with designers and other developers.
Answer Example: “An iOS developer should have a strong relationship with designers because we often work together to create the best user experience possible. I believe that collaboration is key to creating high-quality apps, so I always strive to communicate clearly with designers about their needs and goals. This helps me create code that meets their requirements while also meeting mine as an iOS developer.”
This question can help the interviewer determine your level of experience with iOS development and how you approach projects. Your answer should show that you understand the importance of security, privacy and user experience when working with mobile devices.
Answer Example: “The most important thing to remember when working with mobile devices is to always keep security in mind. This means ensuring that all data is encrypted, passwords are strong and sensitive information is protected. It’s also important to remember that privacy is a top priority when developing for iOS devices. Users should have control over what information is shared and how it’s used. Finally, it’s essential to remember that user experience is key when designing apps for mobile devices.”
This question can help the interviewer understand how you approach challenges and whether you have experience with flexibility. Use examples from previous projects that highlight your ability to adapt to changing circumstances, solve problems and work with little or no direction.
Answer Example: “I recently had to be flexible when developing an iOS app for a client. The project required me to create a user-friendly interface that included multiple features, all while maintaining a high level of security.”
This question is a great way to see how you would apply your skills to real-world situations. It also shows the interviewer what interests you have outside of work, which can be important for building relationships with coworkers. When answering this question, think of an app that you would use personally and explain why you think it’s important.
Answer Example: “If I were given the opportunity to create my own app, I would create an app called ‘Food Finder’. This app would allow users to search for nearby restaurants that serve their favorite foods. It would also provide directions to each restaurant and allow users to leave reviews about their experiences there. This app would be useful for those who are traveling or just looking for new places to eat.”
This question can help the interviewer understand how you would respond to a challenging situation. Your answer should show that you are willing to take responsibility for your work and fix mistakes when they occur.
Answer Example: “If I noticed a mistake in one of my previous apps, my first step would be to assess the severity of the issue. If it was a minor mistake, such as an incorrect label or spelling error, I would simply update the app with the correct information. If it was a more significant issue, such as a bug or crash, I would immediately begin investigating the cause so that I could develop a solution.”
The Objective-C programming language is the primary language used for developing iOS apps. The interviewer may ask this question to see how much experience you have with Objective-C and whether you’re comfortable using it in a professional setting. To answer this question, you can list some of the features of Objective-C that you’re familiar with and explain how they work.
Answer Example: “I have extensive experience with the Objective-C programming language. I have been working with it for over five years, and I am very familiar with its syntax and functionality. I have developed several iOS applications using Objective-C, including apps that require complex data management and security features.”
XML is a common language used in iOS development. The interviewer may ask this question to see if you have experience working with XML and how well you can use it. In your answer, explain what XML is and explain how you’ve used it in your previous work.
Answer Example: “XML is a markup language used to define the structure of data. I have extensive experience working with XML, including developing custom frameworks and libraries for parsing and generating XML documents. I understand the different approaches to parsing XML documents, including DOM, SAX, and XPath.”
This question can help the interviewer understand how you prioritize your work and determine when an app is ready to be released. Your answer should show that you have a strong understanding of the testing process, including any steps you take to ensure that an app is ready for public use.
Answer Example: “When testing my apps, I always make sure they are bug-free before releasing them to the public. I begin by conducting a thorough review of the code to look for any errors or inconsistencies. Then, I run multiple tests on each feature of the app to ensure they’re working properly. Finally, I submit the app to an external tester who uses it in different environments to make sure there aren’t any issues. Once all of these steps have been completed, I can feel confident that the app is ready to be released.”
This question is an opportunity to show your knowledge of the company’s products. It also allows you to give constructive criticism, which can be helpful for the company’s future development.
Answer Example: “I think the app was fairly user-friendly. There were a few areas where I think it could be improved, though. For example, I found it confusing when I tried to change the color of my avatar. The button was small and hard to find. I think it would be better if it were placed next to the color palette rather than hidden in the bottom right corner.”
Debugging is a common task for iOS developers. The interviewer may ask this question to see how you approach solving problems and whether your process is effective. In your answer, describe the steps you take when debugging an app and explain why these steps are important.
Answer Example: “When debugging an app, I like to start by looking at the console log. This gives me an idea of what’s going wrong in the app and where it’s happening. Next, I’ll check out the code to see if there are any obvious issues. If not, I’ll look at the app’s environment settings to see if there’s anything out of the ordinary. Finally, if all else fails, I’ll contact my team lead for help.”
This question is a great way to see if the candidate has experience with iOS and its unique features. You can also ask this question to see if they have experience working with other mobile operating systems, such as Android or Windows. This can show you how well they might fit into your team environment.
Answer Example: “iOS is unique because it’s the only operating system that’s built entirely on Apple’s proprietary software. This means that it has a consistent user experience across all devices, unlike Android, which is built on Linux. Another unique feature of iOS is the App Store, which allows users to download third-party apps without having to jailbreak their device.”
This question can help the interviewer determine your level of expertise in different programming languages. Use this opportunity to highlight any other languages you’re familiar with and how they relate to your experience as an iOS developer.
This question can help the interviewer determine your understanding of the challenges of developing for mobile devices. Your answer should show that you understand the importance of user experience, performance and security when developing for iOS.
Answer Example: “I think it’s important to remember that mobile devices are used differently than desktop computers. Users often have fewer features available to them, so it’s important to make sure that the app they’re using is easy to navigate and use. I always make sure my apps are user-friendly and easy to navigate.”
This question can help the interviewer determine how committed you are to your career and whether you’re likely to stay with their company for a long time. Your answer should show that you have an interest in learning new things, but it’s also important to mention any certifications or training you’ve completed recently.
Answer Example: “I am always looking for ways to improve my programming skills. I regularly attend webinars and online courses about different programming languages and technology trends. In fact, I just finished a course on Swift 4 development last month. I also try to read up on news stories about Apple products and advancements in technology.”
Troubleshooting is a skill that all developers need. The interviewer may ask this question to see how you approach problem-solving and determine whether you have the necessary skills to fix bugs in their system. In your answer, explain the steps you take to troubleshoot a bug in code.
Answer Example: “When I encounter a bug in my code, my first step is to identify what exactly is causing the issue. To do this, I use debugging tools such as print statements and breakpoints to trace the root cause of the bug. Once I have identified the source of the problem, I then work through each line of code to determine where the issue lies. This process can take some time, but it is important to thoroughly examine each line of code in order to find a solution.”