Application Developer interview questions and answers Workable


If you add multiple Views to a FrameLayout then it’ll stack them one above the other, so FrameLayouts are also useful if you need overlapping Views, for example, if you’re implementing an overlay or a HUD element. Since the AsyncTask maintains a reference to the previous instance of the Activity, that Activity won’t be garbage collected, resulting in a memory leak. When you have data that needs to persist across Activity restarts (i.e you need to use retained fragments). Some Android-powered phone allows you to upgrade to the higher Android operating system version. However, not all upgrades would allow you to get the latest version. It depends largely on the capability and specs of the phone, whether it can support the newer features available under the latest Android version.

  • Some of the other tools are Sentry (useful when you write an app in JavaScript, e.g., for React Native), Appsee, Raygun, and Instabug.
  • Android 13 is the latest release of the Android mobile operating system, expected to reach platform stability in June/August of 2022.
  • It is an open-sourced operating system that is used primarily on mobile devices, such as cell phones and tablets.
  • The reason for doingso is that the activity life cycle onCreate() method is called only once.

The use of XML-based layouts provides a consistent and somewhat standard means of setting GUI definition format. In common practice, layout details are placed in XML files while other items are placed in source files.

Mobile Developer Interview Questions

You can see in this article how and why Android app development trends are on the rise. Like an interface in Java, the protocol defines a list of optional and required methods that a class can/must implement to adopt the protocol. Any class can define a protocol, and other classes can send protocol method-based messages to the class without knowing its type. Different paradigms help solve different problems, and RxJava helps simplify asynchronous programming.

Andrei is an experienced full-stack web developer with almost a decade of experience working with a large variety of technologies—over half of that working remotely. He is equally comfortable collaborating with a team of developers or flying solo. He has worked with satisfied clients from the US, Australia, Kuwait, and Russia. The how to become a mobile developer finished app is built into an IPA file, which has to be signed by some certificates. Xcode helps to do it all automatically using the Distribution Certificate and the Provisioning Profile, which connects the DC to the app ID. Apple requires a developer account connected with the Apple Developer Program to publish apps here.

General Questions

Before you start interviewing potential candidates who will build a mobile app you want to launch, take a look at our extensive list. We’ve categorized the questions into different components to give you a well-rounded view of the potential individual you’ll hire. Each of the questions will address different aspects of the mobile app developer’s experience, skills and more. Mobile developers create and maintain mobile applications for android, iOS, and windows devices. Responsibilities of the mobile developer include creating applications, researching technology trends, and brainstorming new ideas with computer engineers. Your due diligence is important when hiring mobile app developers.

Mobile Application Testing tests the features and functions of the apps loaded onto a mobile device. And make no mistake about it; Android is the dominant operating system today. According to Statcounter, Android has a commanding market share of 75.22% versus iOS’ 22.76%, based on figures from January 2018 to January 2019. The demand for trained Android developer professionals consequently remains strong.

Mobile app developer interview questions

With the growing popularity of Android mobile devices, developers can take advantage of this trend by creating and uploading their apps on the Android Market for distribution to anyone who wants to download it. Keeping users engaged, keeping up with bug fixes and updating app versions is part of the maintenance process. No one knows the ins and outs of your app better than your mobile app developer. Hearing most of the following will indicate that the mobile app developer being interviewed has a good understanding of all the stages of the development of a mobile app. Not all mobile app developers will have built an app from scratch, but rather worked on different aspects of the app. Ask these questions during your in person or virtual video conference interview to find out if this person is right for you and your idea.

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  • Also, keep an eye out for potential hires who are passionate about their field and take on side projects.
  • Here are 4 data types that you want your developer to take into account.
  • In common practice, layout details are placed in XML files while other items are placed in source files.
  • The signature on an application’s executable code is protected because the signature becomes invalid if any of the programs compiled components changes.

So in order to interact they need to decompose their objects into primitives that the OS can understand and gather the objects across that boundary. The code to do that gathering is very complex to write, so Android handles it with AIDL. So generally AIDL is similar to the other IDLs and it allows to define the programming interface that both the client and service agree upon in order to interact with each other using interprocess communication . Autolayout is a layout system that allows you to create user interfaces such as iPhone apps and iPad apps, which can adapt dynamically depending on the size at runtime. The interface elements in our applications are known as UI elements. Some of these components, such as buttons and text fields, will respond to user interactions, while others that include pictures and labels provide information. The Web Development bootcamp is an intensive, hands-on learning experience, designed to introduce the skills and concepts required to build modern web applications.

What is the difference between native mobile app design and responsive web design?

Therefore, if you only have the retained version of an object, you will share that copy of the same with whoever sent it to you. Questions about improving your apps to be faster, more efficient, less crashy, and similar. Questions are grouped by category, and I’ve also tried to provide some idea of difficulty using a traffic light system. Obviously my idea of “easy” or “hard” won’t exactly match yours, but hopefully it at least lets you focus your attention more easily. To get started, select a category, then select a question that interests you. No one can argue against the fact that the best team requires the best people to be successful….

What is Dart used for?

Dart is a client-optimized language for developing fast apps on any platform. Its goal is to offer the most productive programming language for multi-platform development, paired with a flexible execution runtime platform for app frameworks.

Before your interview, read through the company’s website and social media accounts to get an idea of what their employees are like. If they seem friendly and collaborative, emphasize that you enjoy working in those types of environments. If they seem more competitive or individualistic, explain that you prefer a more challenging work environment where you can use your skills to solve problems on your own. It is Apple’s main software design pattern for developing iOS apps.

Intents displays notification messages to the user from within the Android enabled device. It can be used to alert the user of a particular state that occurred. Show interest on what they are doing, discuss some details and make some relevant suggestions about their projects. If they do, it’s a solid indication that they know how to keep track of deliverables, use the tool to communicate with key stakeholders, and track the progress every step of the way.

mobile developer interview questions answers

Interviewers will expect you to have perspectives on when collaboration is effective and when it isn’t. Many developers feel that their job is finished once the application is released into production or commercial use. They feel that the ongoing maintenance and support for the application is the responsibility of the end-user support team or other members of the software development organization.

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