Johnnette Technologies Android Developer Interview Questions and Answers

Android components are building blocks of an Android app. They include activities, services, broadcast receivers, and content providers.

• Activities - UI components that handle user interactions

• Services - Background components that perform long-running operations

• Broadcast Receivers - Respond to system-wide broadcast announcements

• Content Providers - Manage shared app data

Parcelable is faster and more efficient than Serializable.

• Parcelable is an Android-specific interface while Serializable is a Java interface.

• Parcelable is faster and more efficient than Serializable.

• Parcelable requires more work to implement than Serializable.

• Parcelable is used to pass data between Android components while Serializable is used for general serialization.

• Parcelable is preferred for performance-critical o

ANR can be handled by optimizing code, using background threads, and avoiding long-running operations on the main thread.

• Optimize code to reduce processing time

• Use background threads for long-running operations

• Avoid performing network operations on the main thread

• Use AsyncTask or HandlerThread for background processing

• Use StrictMode to detect and fix ANR issues during development