Top 10 Android development Interview Questions & Answers

by chittaranjan deo

As a candidate for Android development, you would definitely like to know the best possible questions you might face in your next Android Interview. Thought the questions change from one interviewer to another, we would like to put together a set of questions considering that it is expected from you to know the correct answers to these essential questions.

List of Freelance Android Developers

Here you go:

Question 1

Which tool you will use for your Android development and what is importance of having an emulator within your that development environment?

Answer: ‘Android Studio’ is the standard development tool we use for development and an emulator within this environment allows us to play around an interface as if it’s an actual mobile device

*Tip: Remember, some interviewers go logically from start of development till deployment while some ask random questions but they all get some words from your earlier answer to phrase their next questions, so be careful about using the right words

Question 2

What is a Hybrid mobile App?

Answer: Hybrid applications are web applications in native browsers. They are developed using HTML, CSS and JavaScript and then wrapped in native application.

*Tip: You should be prepared to answer a few questions which you may feel ‘out of Syllabus’ as the interviewer will try to see whether you understand the overall development methodology

Question 3

What is importance of XML based Layout?

Answer: XML based layouts provide standard means of setting up the User Interface definition format

*Tip: You may be a developer but your knowledge of UI/UX is equally important for overall success of the developed product

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Question 4

What are some of the challenges for developers working in Android App development?

Answer: Since Android is an open source format, different Android OS have been released in different devices on different versions and upgrades. An App developed for particular OS may or may not run on another version and developer need to analyse and correct the code

*Tip: Challenges are often asked as it gives an overview of developer’s ability to resolve the real life development issues

Question 5

What is AIDL?

Answer: AIDL stands for Android Interface Definition Language. It handles the interface requirements between a client and a service.

*Tip: The jargon of acronyms is a part of developer’s life and we are supposed to know at least the key acronyms and their long form as well as meaning.

Question 6

What are Activities and Intents?

Answer: Activities are like windows to a user interface. Activities play same role of windows for input and output operations though it may not be always in the form of user interface.

Intents display notification messages to the user from within Android device. It can be used to alert the user also for a particular state of the App

*Tip: Be prepared to answer combined questions and don’t try to mix the answers. Be specific about answering them separately

Question 7

What is importance of setting permissions related to data protection?

Answer: Permissions allow to impose restrictions to protect the data and code. This is necessary so that the code should not get tampered.

*Tip: The same question can be asked from different angles, so take into consideration the interviewer’s intent and answer accordingly

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Question 8

What is a Wi-Fi hotspot?

Answer: Wi-Fi hotspot allows you to share your Mobile internet connection with other wireless devices.

*Tip: Functionality knowledge of the device is an important aspect for developer to know the capabilities and that always gets tested during a technical interview

Question 9

What is the difference between an Activity and a fragment?

Answer: An Activity is typically a single focussed operation that a user can perform, whereas a fragment is a modular section of an activity with its own lifecycle and inputs.

*Tip: Difference between two similar coding functions is favourite question of many interviewers

Question 10

Does Google Play store support deploying country specific Mobile App? Is it important for developer to know the distribution region?

Answer: Google Play lets you choose the countries / territories where you want to distribute your App. You can select all countries or choose specific countries as per App requirement. It is important for developers to know this in advance as it may affect things like time zone support, local pricing, etc.

*Tip: Asking a question or two about deployment process can be common questions to check whether you have end-to-end development and deployment knowledge

We hope you have got the gist of important questions which can help you prepare for your interview

All the Best!