The code for an activity is far more in-depth than for a fragment. Be sure to mention to your interviewer that due to the extended work, activities should only be used for swapping entire screens, while fragments are used for everything else. If possible, list some use cases in which you almost always use a fragment rather than an activity (e.g. when you use components or data that must persist across varied activities). This is a set of tools that Android developers use in order to develop or write apps.
In addition, you’ll also have your web development portfolio to support you in the interview. It will prove a valuable reference point when discussing projects you’ve worked on and scenarios you’ve been in. Lastly, the stress on the day itself can be lessened by preparing for some of the more common questions that how to become a mobile developer will come up. First of all, developers can find it difficult to create apps that easily adjust the display to fit the different screen sizes of all these different devices. Content providers exchange information between different Android applications. Examples include contact information, images, video, and audio.
What is the difference between a Fragment and an Activity?
That transfers knowledge about that piece of code to other teammates and helps catch bugs and design smells early on. Pair programming is a practice where two developers work on the same task together on the same machine . The goal is to facilitate collaboration, discussion, code review, and QA right where the code gets produced. It also improves code quality because two sets of eyes are looking at the code as it’s written. This process happens for two developers at the same time and is sometimes called synchronous. Many developers make a mistake of calling any test object a mock, but there is a specific distinct nomenclature for test objects that indicates the purpose for each one.
- Most browsers these days come with their own debugging tools, so it’s worth pointing out that your exact approach would depend on the browser being used.
- Please use the latest version of Google Chrome or Mozilla Firefox in order to take an interview.
- Your developer should know how the process works and guide you along the way.
- C is procedural programming, whereas Objective C is object-oriented programming.
- Interviewers will ask questions to determine what new ideas you will bring to the organization and your willingness to contribute to the growth of the development team.
- This technique is especially suitable for small and simple apps.
This question can help the interviewer determine your level of expertise with mobile operating systems. You can answer this question by naming the ones you have experience working with and briefly describing what projects you worked on that used those operating systems. Employers ask this question to learn more about your skills and experience. They want to know what makes you unique as a developer, so they can decide if you’re the right fit for their company. When answering this question, think of two or three things that make you stand out from other developers.
Mobile Developer Interview Questions
ViewModel is one of the most critical classes of the Android Jetpack Architecture Component that support data for UI components. Moreover, its main function is to maintain the integrity and allows data to be serviced during configuration changes like screen rotations. Any kind of configuration change in Android devices tends to recreate the whole activity of the application. It means the data will be lost if it has not been saved and restored properly from the activity which was destroyed. To avoid these issues, it is recommended to store all UI data in the ViewModel instead of an activity. In Android, Content Providers are a very important component that serves the purpose of a relational database to store the data of applications.
This question can help the interviewer determine how you might fit into their company culture. Teamwork is an important skill for mobile app developers to have, so it’s likely that your potential employer will want to know that you’re willing and able to work with others on a project. In this article you’ll find iOS interview questions and answers for senior developers. This article continues the work I’ve done before writing The iOS Interview Guide and I will update it every year. In this 2020 edition, I added several new things from my experience and companies where I worked to help you be ready for iOS interview questions now.
What’s Content Provider in android?
On the other hand, services are designed to run behind the scenes, and can act independently. Most services run continuously, regardless of whether there are certain or no activities being executed. A monthly roundup of software strategy, design, and development topics from our experts.