Also, keep an eye out for potential hires who are passionate about their field and take on side projects. They’re more likely to contribute fresh ideas, inform their team about new tools and perform well at work. Android programs are compiled into a .dex file (Dalvik Executable file) by DVM, which are then zipped into a .apk file on the device. It is not possible to test an application for all kinds of devices and operating systems. There might be a possibility that an application is not compatible with your OS.

• At the end of the day, you want your mobile app developer to be as heavily invested in the app as you.
• For example, build.gradle is a script file placed in the root project directory, defines build configurations that will be applied to all modules in your project.
• The ideal candidate will have extensive knowledge of mobile application development and stay abreast of developing trends.
• Testing should be conducted during and after mobile app development.

It also shows that you’re proactive in seeking ways to enhance user experience and overall app quality. The art of debugging is a critical skill for any mobile developer, as it demonstrates not only technical proficiency but also problem-solving abilities and persistence. In today’s hyperconnected world, mobile developers play a critical role in shaping the digital experiences of millions across the globe. If you want to make sure that you’re ready, here is a look at some senior iOS developer interview questions and answers to help you prepare.

Soft skills interview questions

Niels is a seasoned software architect and entrepreneur with over fifteen years of experience. He’s a generalist with strong communication and business skills who speaks the language of customers as well as techies. He has extensive experience as a product architect in B2B hi-tech software as well as B2C web and mobile software. https://remotemode.net/become-a-mobile-developer/ Niels enjoys designing and implementing simple solutions to complex problems. Submitted questions and answers are subject to review and editing, and may or may not be selected for posting, at the sole discretion of Toptal, LLC. Using this technique, elements can be placed in relation to other elements or screen edges.

JobManager automatically handles the network unreliability so it makes handling uploads easier. It describes the basic characteristics of the application and defines each of its components. Again if you Call the activity D, then it will call the same activity from the 2nd stack and pass the intent to onNewIntent(). This enables them to gain an understanding of your business and audience. In turn, it can help them imagine what they can do for your organization.

An Android application keeps crashing. How do you resolve the issue?

Android’s weaknesses stem from one of its advantages, namely that it’s everywhere and can run on a huge number of devices. Since you may have taken advantage of several during your career, it’s wise to discuss each solution you turn to regularly. Additionally, if you can describe use cases and provide examples, your answer will be far more compelling. Additionally, while Objective-C doesn’t support dynamic libraries or Tuples, Swift does.

Next, I prioritized these issues based on their impact on the overall app performance and maintainability. I designed the notification payload to include relevant information such as the headline, article URL, and an image thumbnail. This allowed users to get a quick overview of the story without opening the app.

What is an application resource file?

An unwillingness to pursue cross-platform development is a major red flag. Since the average senior iOS developer has the skills needed to handle debugging, this is one of the more common interview questions for these positions. The answer to this interview question can head in different directions, though, since iOS developers may have their own preferences or unique skills that alter how they approach debugging.

• For doing that the object should be either serializable or parcelable.
• These are frameworks that try to connect the ease of writing multi-platform apps with native performance.
• Developers must be aware that the device on which they are testing their app is just one of thousands of devices their users will use.
• Activity is typically a single, focused operation that a user can perform such as dial a number, take a picture, send an email, view a map etc.
• Since you’ll be working very closely with your mobile app developer, you want to understand how you will be working together (i.e. how often will you be communicating with him or her).

Because of Dalvik, a device will have the ability to execute multiple instances of virtual machines efficiently through better memory management. Android provides a collection of view classes that serve as containers for views. These container classes are called layouts, which are defined in the form of XML files that cannot be changed by our code during execution. The layout managers provided by Android SDK are LinearLayout, RelativeLayout, FrameLayout, AbsoluteLayout, GridLayout, and TableLayout.

Mobile Developer Interview Questions

Additionally, I integrated JSON Web Tokens (JWT) to securely transmit user information between the client and server, ensuring data integrity and confidentiality. To ensure smooth communication within the team, we held daily stand-up meetings where everyone provided updates on their progress and discussed any challenges they faced. This allowed us to address issues promptly and adjust our plans as needed. Additionally, we used agile methodologies and continuously tested the app throughout the development process, enabling us to identify and fix bugs early on.

• Android is an open-sourced operating system that is used on mobile devices, such as mobiles and tablets.
• Another approach I take is participating in online forums and developer communities where professionals share their experiences, challenges, and solutions.
• They’re more likely to contribute fresh ideas, inform their team about new tools and perform well at work.
• Get the realistic interview experience you need to master the interview.

This allows for a deeper discussion of  your goals and plans for the app. It’s always a good sign if the professional is interested in what you do. The applicant may not have all the answers, but a great applicant can prepare ahead and research your company.

Q2. What is an Activity? Which method is implemented by all subclasses of an Activity?

At the end of the day, you want your mobile app developer to be as heavily invested in the app as you. Mobile app developers should give you a tour of the apps on their phone, or happily provide links to the apps on the App Store or Google Play store. They should go into detail about their involvement and how it directly relates to what you’re looking for. Google has changed the lives of everyone by launching a product that improves the mobile experience for everyone. Android helps in understanding your tastes and needs, by giving various features such as having wallpapers, themes, and launchers which completely change the look of your device’s interface. Mobile Testing is performed on the mobile device itself, specifically on the device’s features like Contacts, SMS, the browsers, and it’s Calling function.

This information allowed me to identify areas where users were struggling or dropping off, enabling me to prioritize feature improvements and bug fixes accordingly. For example, by analyzing screen flow data, I discovered that a significant number of users were abandoning the onboarding process midway. To address this issue, I simplified the onboarding steps and added contextual help, which resulted in increased completion rates and overall user satisfaction. Another essential measure is secure storage of user data on the device itself. I utilize encryption libraries like SQLCipher for storing data locally, which adds an extra layer of protection against potential breaches. Additionally, I follow best practices for handling authentication tokens, such as using short-lived tokens and securely storing them in Keychain (iOS) or Keystore (Android).

So make sure to stir out specific answers from the professional to see how they can incorporate their knowledge directly into your project. There is also a third group of apps, developed using technologies like React Native, Xamarin, or Flutter. These are frameworks that try to connect the ease of writing multi-platform apps with native performance. They offer the possibility to write code in one language—JavaScript, C#, or Dart—and compile it into native code.