Limpidstone Technology Android Mobile Application Developer Interview Questions, Process, and Tips

An array is a data structure that stores a collection of elements of the same type. The index of an array is the position of an element within the array.

• Arrays are used to store multiple values in a single variable.

• To find the index of an element in an array, you can use the indexOf() method.

• Example: String[] array = {"apple", "banana", "orange"}; int index = Arrays.asList(array).indexOf("banana");

Shared Preference is a way to store key-value pairs in Android applications.

• Used to store small amounts of data locally on the device

• Data persists even after the app is closed

• Can be used to store user preferences, settings, etc.

• Example: Storing user login credentials

The Android lifecycle refers to the series of states an app goes through from when it is first launched to when it is closed.

• The Android lifecycle includes states such as onCreate, onStart, onResume, onPause, onStop, and onDestroy.

• Activities and fragments have their own lifecycle methods that are called at different points in the overall app lifecycle.

• Understanding the Android lifecycle is important for managing resour...read more

A fragment is a modular section of an activity that has its own lifecycle, layout, and behavior.

• Fragments are reusable components that can be used in multiple activities.

• They can be added or removed from an activity dynamically.

• Fragments allow for better organization and reusability of code.

• Examples include a navigation drawer, a list of items, or a settings screen.

Data can be passed between activities using Intent and Bundle.

• Create an Intent object in the sending activity

• Add data to the Intent using putExtra() method

• Start the new activity by calling startActivity() with the Intent

• Retrieve the data in the receiving activity using getIntent() and getExtra()