Android Interview Questions for Fresher and Experienced In 2021
Android is an open-sourced operating system which is founded by Andy Rubin. Android is a Linux-based operating system that allows developers to develop and run apps that perform both basic and advanced functions.
With more than 70% market share, Android is the most popular mobile operating system globally, which is making it important for companies and developers to land on mobile devices. Android Developers are still in strong demand. We have a list of basic android interview questions that can help you crack an interview.
Basic Android Interview Questions to be Asked
1. What is Android?
Android is a mobile operating system based on the Linux kernel. It is primarily designed for touchscreen mobile devices like smartphones, tablets, and smart televisions.
2. What is Android Architecture?
Android Architecture is made up of 4 key components:
- Linux Kernel
- Android Framework
- Android Applications
Read More: Top iOS Interview Questions and Answers
3. How many apps have you published in the google play store
Candidates should be able to tell how many apps are published in the google play store. A junior-level candidate should have published at least 1-2 apps on the google play store. Mid-level android developers should have published 2-5 apps, a Senior level candidate should have published 5+ apps.
4. Have you worked on third party APIs?
The candidate should tell you if they have worked on integrating third party APIs in the app like Facebook API, Instagram API, Paypal API.
5. How many years have you worked in android development?
Candidates should be able to tell the number of years spent on android development. If a candidate’s experience is 1-2 years, the candidate is at junior level. 2-5 years experience is mid-level, 5+ years experience in Senior level.
6. What experience do you have in integrating APIs with the app?
The candidate should be able to tell the recruiters about the exp in integrating APIs with the app.
7. What database have you used in building an Android app?
CoreData is used to save data locally in the app. The backend database could be MySQL, MongoDB, NoSQL, AWS-DynamoDB.
Advanced Technical Questions to be Asked
1. What is AAPT?
AAPT is short for Android Asset Packaging Tool. This tool provides developers with the ability to deal with zip-compatible archives, which includes creating, extracting, and viewing its contents.
2. What items are important in every Android project?
These are the essential items that are present each time an Android project is created:
3. What is the importance of XML-based layouts?
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.
4. What are containers?
Containers, as the name itself implies, hold objects and widgets together, depending on which specific items are needed and in what arrangement is wanted. Containers may hold labels, fields, buttons, or even child containers, as examples.
5. What is the importance of Android in the mobile market?
Developers can write and register apps that will specifically run under the Android environment. This means that every mobile device that is Android enabled will be able to support and run these apps. 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.
6. What is ADB?
ADB is short for Android Debug Bridge. It allows developers the power to execute remote shell commands. Its basic function is to allow and control communication towards and from the emulator port.