Top 10 Mobile Apps Interview Questions (With Sample Answers)

By Indeed Editorial Team

Published 11 May 2022

The Indeed Editorial Team comprises a diverse and talented team of writers, researchers and subject matter experts equipped with Indeed's data and insights to deliver useful tips to help guide your career journey.

Whether you are a fresher or have years of experience working in mobile app development, interviews are a crucial step of the recruitment process. Doing well in interviews can help impress recruiters with your accomplishments, skills and interests, helping you secure the role. Preparing for a mobile app interview can be overwhelming, especially if you are new to the field. In this article, we explore some of the common mobile apps interview questions and share sample answers to help you prepare for an upcoming interview.

Related: What Is An Application Developer? Definition And Skills

Technical mobile apps interview questions

Having knowledge of common mobile apps interview questions can improve your chances of getting hired. Since mobile app development is a technical role, interviewers are likely to evaluate your technical skills during the interview process. Before attending the interview, you can revise the basics of mobile app development to keep yourself updated with the latest tools and other developments in the field. Here are some of the common technical interview questions, along with sample answers:

1. What are native, web and hybrid apps?

An interviewer usually asks this question in a mobile app design and development interview. The idea behind this question is to make you comfortable with the in-depth technical questions that follow. Explain the definitions of these three apps concisely and straightforwardly.

Example: "Native apps run exclusively on a specific platform like iOS or Android. Web apps run on mobile or web browsers. Hybrid apps are a combination of both native and web apps. They are web pages wrapped in a mobile app."

2. How do you choose between native and hybrid apps?

Hiring managers ask this question to check whether you are familiar with the terminologies of native and hybrid apps. As these app types have varying pros and cons, interviewers do not expect you to choose one over another. Instead, they evaluate if you can provide an unbiased answer based on the business requirements.

Example: "Both native and hybrid apps have their pros and cons. Hybrid apps are easier to develop and require lesser maintenance than native apps. In contrast, native apps are faster as the speed of hybrid apps depends on the browser's performance. So, I would choose the right app style after evaluating various factors like available budget, development time, required features, objectives of the app and target users."

3. Describe the process of publishing apps on Apple's app store and Google Play.

The interviewer asks this question to check if you have prior knowledge of publishing apps on Android or iOS platforms. If you have experience in publishing apps in the past, you can highlight them here to demonstrate that you have a working knowledge of the app launch process.

Example: "Both Google and Apple require an app description, images and a unique identifier to publish apps on their platforms. In Google Play, when an app is ready, the developer builds the android application package (APK) file and signs it with a Keystore. Once the developer sends the files, it takes a few hours before the app is available on Google Play.

Apple requires developers to have a developer account to publish apps. The next step is creating a profile for the app in iTunes Connect. The developer then builds the finished app as an IPA file and uploads the necessary certificates. It takes a few working days for the team at Apple to review and publish the app."

4. What is app sandboxing?

You can expect the interviewer to ask you questions about the different mobile development terminologies to check if you are aware of them. If you do not know a particular terminology, be honest and let the interviewer know you are unaware of it, but you are eager to learn. You can also mention that you have chosen the field of mobile app development for the vast learning opportunities.

Example: "App sandboxing is a security mechanism to isolate apps at the kernel level. In this methodology, one can run each app in its sandbox, having limited access to data. It can access only its data files and other apps cannot read or write over this data. Sandboxing helps to protect apps from other malicious software on the device."

5. What is internationalisation and localisation? Are they the same?

The interviewer may ask challenging questions like these to determine if you have a deep understanding of mobile app development and evaluate your skill levels. Despite their similarity, these terms are not the same.

Example: "Internationalisation is the process of adapting the app code to other languages. For example, an app might display prices in different currencies or different formats. It takes into account the user's time zone. Localisation is the process of translating the app content to different languages. The resources for different languages are available in different directories and the OS chooses the relevant one based on the user's default language settings."

Related: Mobile Testing Interview Questions

Other expected interview questions for a mobile app developer

The interviewer asks general questions that test your professionalism, work ethic and overall personality. Here are some of the common questions in this section:

1. Walk us through the mobile apps you have worked on recently

An interviewer may ask this question to determine if you have the right skill-sets for their current projects. You can read the job description to identify employer requirements and research the company, its products and services. Then frame your answer to suit the employer's needs.

Example: "Most recently, I have been working on remote learning mobile apps. Earlier in my career, I focussed on apps for the financial industry. Recently, our team worked on a remote learning app for K-12 students. We launched the app on both iOS and Android platforms. I can share the link to the apps if you would like to check the functions and user interface."

Related: How To Crack A Job Interview

2. Share some challenges that you faced while creating a mobile app for a client.

The interviewer asks this question to evaluate your problem-solving skills. While answering this question, do not blame others, like the client or your teammates. Instead, focus on the lessons you gained from the experience and how they helped improve your professional skills.

Example: "The most challenging project I recently worked on was a mobile app for managing a sports team. We had to develop the application quickly, as the team owners wanted to launch the app before the championship games. We did not have the time to put the app through several rounds of testing like we usually do. To overcome this challenge, I suggested developing the app concurrently with the testing team working on completed functionalities. Together we were able to launch the software as per schedule with minimal bugs."

Related: 9 Common Mistakes To Avoid In An Interview

3. What steps do you take to ensure the mobile app's usability?

Sometimes, mobile app developers focus more on the technical aspects of the app like functions, operations and processes. This may result in issues related to the design and usability of the app. Ensure that your answer highlights how you balance functionality and usability without compromising one over another.

Example: "I think from the user's point of view, keeping in mind the target audience and user demographics so that I can choose the right functions that fit the end user's requirements. Also, I consider the usage scenario and possible use-cases before I commence working on the app. Finally, I involve myself in the testing process to ensure that the app is user-friendly and delivers the best possible user experience."

4. Tell us about your preferred mobile app development methodology

The interviewer tests whether you are familiar with popular development methodologies like agile and scrum. Explain your working style from design to launch and how you use various tools and methodologies for each step of the development process.

Example: "I prefer the agile methodology as it allows for adaptability and flexibility. Since agile is an iterative process, it provides for adding additional features and requirements as per client feedback. Agile methodology allows developers to share each iteration with the client and get their feedback, incorporating the suggestion in the successive iteration. As a result, the final product has a higher chance of meeting client requirements."

5. How do you collaborate with your team members and communicate with your manager?

Mobile app development is a team activity. The interviewer checks if you are a team player and how you handle miscommunications or conflicts at the workplace. Give specific examples of your working style within a team and independently.

Example: "I enjoy working in teams and I am more productive when I have a collaborative and supportive team. Usually, our team meets as a group in the morning to discuss and brainstorm. We then work independently, coming together for a quick refocus session at the end of the day. This schedule worked well as we were able to accomplish both our individual and collective goals."

Please note that none of the companies, institutions or organisations mentioned in this article are associated with Indeed.

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