LNJ Institute of Skills and Technology Interview Questions and Answers

FrameLayout is a layout manager that allows multiple child views to be stacked on top of each other.

• FrameLayout is used to display a single view at a time.

• It is commonly used for displaying fragments, dialogs, and popups.

• It is also useful for creating custom views with overlapping elements.

• The child views are positioned relative to the top-left corner of the layout.

• The last child added to the layout is displayed on top of the others.

Firebase offers a variety of features for mobile and web app development.

• Realtime Database

• Authentication

• Cloud Firestore

• Cloud Storage

• Cloud Functions

• Hosting

• Crashlytics

• Performance Monitoring

• Remote Config

• Dynamic Links

There are two types of network calls available in Android: Synchronous and Asynchronous.

• Synchronous network calls are executed on the main thread and block the UI until the response is received.

• Asynchronous network calls are executed on a separate thread and do not block the UI.

• Examples of synchronous network calls include HttpUrlConnection and OkHttp.

• Examples of asynchronous network calls include Retrofit and Volley.

Services in Android are background processes that can run even when the app is not in foreground.

• Services are used for long-running operations such as playing music or downloading files.

• They can be started and stopped using startService() and stopService() methods.

• Services can also be bound to an activity using bindService() method.

• Foreground services are used for tasks that require user attention such as playing music.

• IntentService is a subclass of Service that handles async...read more

Broadcast receiver is a component that receives and responds to system-wide broadcast announcements.

• Broadcast receiver is a part of the Android system that listens to system-wide broadcast announcements.

• It can be used to receive and respond to events such as battery low, network connectivity changes, incoming SMS, etc.

• It can be registered either statically in the AndroidManifest.xml file or dynamically in code.

• Once registered, it can receive broadcasts even if the app is not ...read more

Coordinating layout is a type of layout in Android that allows multiple child views to be positioned relative to each other.

• Coordinating layout is used to create complex and dynamic user interfaces.

• It allows views to be positioned relative to each other using constraints.

• It is more flexible than other types of layouts like LinearLayout and RelativeLayout.

• Examples of coordinating layouts include ConstraintLayout and CoordinatorLayout.