You have chosen the best clothes, your resume and other reference materials are neatly assembled and ready, and you feel well-rested. Non-default constructors on a Fragment are not advisable because the Fragment may be destroyed and recreated due to a configuration change (e.g. orientation change). Using #setArguments()/getArguments() ensures that when the Fragment needs to be recreated, the Bundle will be appropriately serialized/deserialized so that construction data is restored. Although onDestroy() is the last callback in the lifecycle of an activity, it is worth mentioning that this callback may not always be called and should not be relied upon to destroy resources. It is better have the resources created in onStart() and onResume(), and have them destroyed in onStop() and onPause(), respectively. Under what condition could the code sample below crash your application?

Senior Android developer interview questions

In an application, An Intent is a messaging object that can be used to request an action from another app component. It specifies the type of intents that the component would like to receive. For instance, you make it possible for other apps to directly start your activity with a certain kind of intent by declaring an intent filter for an activity. The Android platform provides several sensors that are used to monitor the motion of a device. Android AsyncTask going to do background operation on the background thread and update on the main thread.

Q41: What is the difference between the System.currentTimeMillis() and System.nanoTime() methods in Android?

Retained Fragment consists of the configuration change that causes the underlying Activity to be destroyed. The term “retained” refers to the fragment that will not be destroyed on configuration changes. The weaknesses of Android stem from one of its strengths, namely that it is available everywhere and can run on a wide variety of devices.

Senior Android developer interview questions

If you have experience in this area, it will show the interviewer that you’re a well-rounded developer who understands the importance of quality assurance. It also shows that you’re comfortable using the latest technologies, which is always a plus. Be prepared to provide specific examples of projects you’ve worked on and the technologies used.

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Memory management is critical in Android app development, and an interviewer will want to know that you have the technical knowledge and experience to handle these issues. They’ll also want to know that you can quickly identify and address any potential memory issues in an app. One of the main challenges of developing for mobile is the array of different device sizes and resolutions.

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. You can see in this article how and why Android app development trends are on the rise. This is a great opportunity to demonstrate your commitment to the craft and staying ahead of the curve.

Is the latest Android operating system supported in all mobile phones?

If not, you can simulate the situation and talk about how you would do it. 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. Mobile Application Testing tests the features and functions of the apps loaded onto a mobile device. Content providers share information between different Android applications.

This is because a serializable approach creates a lot of temporary objects and garbage collection. In contrast, the parcelable method is much faster because developers are explicit about the serialization process rather than using reflection to infer it. Don’t forget to check our best Android tutorials recommended by the community to further help your preparation.

Q51: What is the difference between the android:layout_width and android:layout_height attributes in Android?

By its very nature, making, testing, and maintaining all software is a complex venture. As a result, every member of the development team has an importantcontribution to make. Terminating or killing the foreground activity is the last and final savior.

Senior Android developer interview questions

The growth has been seen rapidly over the years and is the most used smartphone operating system in the world. The reason may be because of adding a large number of phones from different companies, by bringing in their twist, developing gradually day by day. It is an indispensable way to enable data sharing between applications.

What programming languages are used to develop Android applications?

It encapsulates the data and provide mechanisms for defining data security. ContentProvider is the standard interface that connects data in one process with code running in another process. We start off with some basic Android interview questions, before moving on to the more difficult ones. As a recommended architecture approach by Google, MVVM has become a standard in Android development. Libraries let you take advantage of the work of other developers for better performance as you create apps.

  • Due to their limited experience, entry-level Android developers must usually be mentored by mid-level and senior Android developers.
  • To answer this question, you want to make sure that you demonstrate your familiarity with the Material Design guidelines.
  • Without this, codes could be compromised, resulting in defects in the actual function.
  • The debug build type will use an android debug certificate for packaging the APK file.
  • Finally, highlight any successes you had in developing an app for a particular version, such as increased user engagement or improved performance.

Finally, explain why you think it’s important to create an intuitive user experience and discuss any challenges you’ve faced while designing for Android devices. This question is designed to gauge a candidate’s experience working on complex projects that involve multiple components. It also gives the interviewer an idea of how well the candidate understands the basics of Android development, such as the use of APIs and the integration of third-party services into an app. Knowing how to do this is essential for any senior android developer. If you’re preparing for an interview as an Android Developer, it’s important to have a solid understanding of the platform and the tools used to develop Android apps. To help you prepare, we’ve compiled a list of the top 50 Android Developer interview questions for 2023, along with detailed answers.

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