Interviewing Android Developer for E-commerce

 1. What is the difference between a fragment and an activity in Android?

In Android, an activity represents a single screen with a user interface that the user can interact with, while a fragment represents a portion of an activity’s UI or behavior that can be reused across multiple activities.

2. What is the significance of the AndroidManifest.xml file in an Android application?

In an Android application, the AndroidManifest.xml file is a key element. It is an XML file that provides important information about your application to the Android operating system.

3. How do you implement data binding in an Android application?

Data binding is a powerful feature in Android mobile app development that allows you to link UI components in your layout files to data sources in your app, such as a ViewModel or model object. This simplifies your code, reduces repetitive code, and makes your application more efficient.

4. What is the distinction between implicit and explicit intents in Android?

In Android, intents are a means of communication among various components of an application as well as between different applications. They can be used to call on the system to carry out operations such as opening a particular activity, sending a message, or sharing data.

5. What layout types are available in Android? When should you use each one?

An Android layout organizes UI components within activities or fragments. There are several types of layouts available in Android, each serving different purposes.

6. What is the difference between Services and Broadcast Receivers in Android?

Android system components running background tasks are Services and Broadcast Receivers.

7. How do you handle background tasks in an Android app?

Depending on your app’s needs as well as the type of task at hand, there are various means to deal with background activities in Android applications.

8. What is Android Debug Bridge (ADB)?

On a computer, using ADB allows interaction between it and an Android device or emulator via the command line. ADB forms part of the platform tools featured in Android SDK; therefore, it comes with several functionalities for debugging, installing, and managing applications related to Android.

9. What do DDMS and AIDL stand for?

DDMS, also known as Dalvik Debugging and Monitoring Server, is a software tool included in the Android SDK. It allows developers to monitor and debug Android applications running on either an emulator or a connected device. On the other hand, AIDL stands for Android Interface Definition Language. It is a language used by Android for defining IPC interfaces between different components of an application or between different applications.

10. What dialog boxes does Android support?

Android offers numerous kinds of dialogue boxes that allow for interaction with users and the presentation of essential information.

11. What is the Android app lifecycle and how do you handle each stage?

The stages through which an app passes from when it is first started to when it terminates or stops is called the life cycle of an Android app.

12. How do you implement localization in Android applications?

Localization is the process of adapting an app to different languages, cultures, and regions.

13. What is the purpose and use of Android’s LayoutInflater?

For creating a view hierarchy from an XML layout file, Android’s LayoutInflater does it. It creates the object of the XML layout resource and returns the hierarchy of views that are created. The purpose was to provide better ways for app developers to create UIs by loading XML layout resources and constructing these corresponding view objects.