Business Pro Creations Interview Questions, Process, and Tips

The life cycle of an activity and fragment in Android determines how they are created, started, resumed, paused, stopped, and destroyed.

• Activity life cycle: onCreate(), onStart(), onResume(), onPause(), onStop(), onDestroy()

• Fragment life cycle: onAttach(), onCreate(), onCreateView(), onActivityCreated(), onStart(), onResume(), onPause(), onStop(), onDestroyView(), onDestroy(), onDetach()

• Activity and fragment life cycle...read more

Different ways to store data in Android include SharedPreferences, SQLite database, Content Providers, and File system.

• SharedPreferences: used to store key-value pairs

• SQLite database: used for structured data storage

• Content Providers: used for sharing data between applications

• File system: used for storing files locally

One way to store multiple data in mobile without using SQLite is by using SharedPreferences.

• SharedPreferences can be used to store key-value pairs of data.

• It is a lightweight storage option and is easy to implement.

• Data can be stored as primitive types, strings, or sets.

• Example: Storing user preferences, app settings, or small amounts of data.

The activity life cycle in Android refers to the sequence of events that occur when an activity is created, paused, resumed, and destroyed.

• Activities have different states such as onCreate, onStart, onResume, onPause, onStop, and onDestroy.

• The activity transitions between these states based on user interactions and system events.

• For example, when an activity is first created, the onCreate method is called, followed by ...read more

To increase app performance, I would use techniques like code optimization, caching, multithreading, and reducing network calls.

• Optimize code by removing unnecessary operations and improving algorithms

• Implement caching to store frequently accessed data locally

• Utilize multithreading to perform time-consuming tasks in the background

• Reduce network calls by batching requests or using local storage

• Use tools like Android Pro

The output of a left join operation.

• A left join returns all the rows from the left table and the matching rows from the right table.

• If there is no match, NULL values are returned for the right table columns.

• The output will have all the columns from the left table and the matching columns from the right table.